ios项目 学习总结

主要是一个图片展示的项目，现在才发现，项目前期的规划很重要，本文记录下项目开发中遇到的问题，

1 动画的实现，在界面内到处飘荡的蒲公英,简单的使用了uiview的动画和时间函数NStimer实现的，代码大致如下：

      puGongYingTimer = [NSTimer scheduledTimerWithTimeInterval:10 target:self selector:@selector(runPuGongYing) userInfo:nil repeats:NO];//时间函数
bigPuGongYingGif =[[GifView alloc] initWithFrame:CGRectMake(-20, 50, 45,46) filePath:[[NSBundle mainBundle] pathForResource:@"pugongying" ofType:@"png"]];
//上面的是GIf图片的实现开始的动画实现       
 　　　　[bgView addSubview:bigPuGongYingGif];
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDelegate:self];
        [UIView setAnimationDuration:50];
        int startX = round(random() % 900);//随机的路径
        int endX = round(random() % 700);
        NSLog(@"startX===%d   endX===%d",startX,endX);
        bigPuGongYingGif.frame=CGRectMake(1025, endX,  45, 46);
        [UIView setAnimationDidStopSelector:@selector(runPuGongYingAgain)];//循环调用
        [UIView commitAnimations];
　　

2 在appdelegate里面页面的跳转方法，先设置为空，然后设置为需要的VC

 　　self.window.rootViewController=Nil;、、
        PingBao_PageViewController *pic_page=[[PingBao_PageViewController alloc]init];
        self.window.rootViewController=pic_page;

3 app不让自动锁屏幕 [UIApplication sharedApplication].idleTimerDisabled=YES;
4单例模式的使用非常有用，下面给一个例子，方面以后使用

#import <Foundation/Foundation.h>

@interface DataPist : NSObject{
    NSMutableDictionary *arryData;
}
@property(nonatomic,strong)NSMutableDictionary *arryData;
@property(nonatomic,strong)NSArray *jianBaoArry;
@property(nonatomic,strong)NSString *ipString;

+(DataPist *) shared;
+(id) allocWithZone:(NSZone *)zone;
+(NSData*)stringToByte:(NSString*)string;
+(void)showLoading;
+(void)hideLoading;
+ (NSString *)dataFilePath ;
@end

#import "DataPist.h"

@implementation DataPist
@synthesize arryData,jianBaoArry,ipString;
static DataPist *ShareDataPist = nil;

+(DataPist *) shared{
    
    @synchronized(self)
    {
        if (ShareDataPist == nil)
        {
            ShareDataPist = [[self alloc] init] ;
            
        }
    }
    return ShareDataPist;
}

+(id) allocWithZone:(NSZone *)zone
{
    @synchronized(self)
    {
        if (ShareDataPist == nil)
        {
            ShareDataPist = [super allocWithZone:zone];            
            return ShareDataPist;
        }
    }  
    return nil;
}

//转码函数16进止的图片转换的NSData
+(NSData*)stringToByte:(NSString*)string
{
    NSString *hexString=[[string uppercaseString] stringByReplacingOccurrencesOfString:@" " withString:@""];
    if ([hexString length]%2!=0) {
        return nil;
    }
    Byte tempbyt[1]={0};
    NSMutableData* bytes=[NSMutableData data];
    for(int i=0;i<[hexString length];i++)
    {
        unichar hex_char1 = [hexString characterAtIndex:i]; ////两位16进制数中的第一位(高位*16)
        int int_ch1;
        if(hex_char1 >= '0' && hex_char1 <='9')
            int_ch1 = (hex_char1-48)*16;   //// 0 的Ascll - 48
        else if(hex_char1 >= 'A' && hex_char1 <='F')
            int_ch1 = (hex_char1-55)*16; //// A 的Ascll - 65
        else
            return nil;
        i++;
        
        unichar hex_char2 = [hexString characterAtIndex:i]; ///两位16进制数中的第二位(低位)
        int int_ch2;
        if(hex_char2 >= '0' && hex_char2 <='9')
            int_ch2 = (hex_char2-48); //// 0 的Ascll - 48
        else if(hex_char2 >= 'A' && hex_char2 <='F')
            int_ch2 = hex_char2-55; //// A 的Ascll - 65
        else
            return nil;
        
        tempbyt[0] = int_ch1+int_ch2;  ///将转化后的数放入Byte数组里
        [bytes appendBytes:tempbyt length:1];
    }
    return bytes;
}
+(void)showLoading{
//    [[UIApplication sharedApplication].windows objectAtIndex:0]
    
       [MBProgressHUD showHUDAddedTo:[[UIApplication sharedApplication].windows objectAtIndex:0] animated:YES];
//    mb.labelText=@"正在加载";
}
+(void)hideLoading{
    [MBProgressHUD hideHUDForView:[[UIApplication sharedApplication].windows objectAtIndex:0] animated:YES];

}
+ (NSString *)dataFilePath {
    //写入library
    NSString *path=[NSHomeDirectory() stringByAppendingPathComponent:@"Library"];
    
    NSString *pathNext = [NSString stringWithFormat:@"%@/Caches",path];
    NSString *fileNamepath=[pathNext stringByAppendingPathComponent:@"Image.plist"];
    return fileNamepath;
}
@end

5  下载多个zip文件图片，然后解压，放入指定的目录，实现

下载实现：

 //宏定义沙盒目录#define DocumentsDirectory [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES) lastObject]
-(void)download{
    mb.labelText=@"正在下载";
    // 初始化队列
    if (!networkQueue) {
        networkQueue = [[ASINetworkQueue alloc] init];
        // 设置最大并发数 默认为-1 无限制
        [networkQueue setMaxConcurrentOperationCount:-1];
    }
    // 重制队列
    [networkQueue cancelAllOperations];
    [networkQueue reset];
    // 设置队列的进度条
    [networkQueue setDownloadProgressDelegate:progressView];
    // 设置完成方法
    [networkQueue setRequestDidFailSelector:@selector(Failed:)];//一个文件下载失败执行
    [networkQueue setQueueDidFinishSelector:@selector(Succeed:)];//不管下载成功失败都会执行的
    [networkQueue setRequestDidFinishSelector:@selector(Finished:)];//一个成功就执行
    // 显示精确进度
    [networkQueue setShowAccurateProgress:YES];
    [networkQueue setDelegate:self];
    ASIHTTPRequest *request;
    //zip_names从服务器去的zipname地址
    for (int i=0; i<[zip_names count]; i++) {
        NSString *name=[zip_names objectAtIndex:i];
        NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@/api/%@.zip",[DataPist shared].ipString,name]];
        request = [ASIHTTPRequest requestWithURL:url];
　　　　　[request setTemporaryFileDownloadPath:[DocumentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.zip.temp",[zip_names objectAtIndex:i]]]];
        [request setDownloadDestinationPath:[DocumentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.zip",[zip_names objectAtIndex:i]]]];
        [request setAllowResumeForFileDownloads:YES];
        [networkQueue addOperation:request];
    }
    [networkQueue go];
}

-(void)Succeed:(ASINetworkQueue *)request{
    if (Flag != NO) {
        [self performSelector:@selector(changeloading) withObject:self afterDelay:0];
        [self jieya];
    }
}
-(void)Finished:(ASIHTTPRequest *)request{
    
}

-(void)changeloading{
    mb.labelText=@"正在初始化数据";
}
-(void)Failed:(ASIHTTPRequest *)request{
    Flag = NO;//一个文件下载失败的时候设置为no，将不会执行Succeed:(ASINetworkQueue *)request里面的解压方法
    if (IsFail==NO) {
        [ MBProgressHUD hideHUDForView:self.view animated:YES];
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"网络更新失败，请重新下载" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:Nil, nil];
        [alert show];
        IsFail=YES;变成yes后，他就只执行一次，
    }
    progressView.hidden=YES;
     [ MBProgressHUD hideHUDForView:self.view animated:YES];
}
//IsFail=NO下载失败，为了不让重复出现下载失败的弹出框;
//Flag = YES;作用是显示只有下载成功后才开始执行 Succeed:(ASINetworkQueue *)request里面的方法，这是他们的初始化值，
//当失败后，又的从新开始他们的数据初始化，IsFail=no，Flag=yes
//解压方法
- (void)jieya{
   要用到zipArchive的类库
    ZipArchive *zip=[[ZipArchive alloc]init];
    for (int i = 0; i < zip_names.count; i++) {
        NSString *name = [NSString stringWithFormat:@"Documents/%@.zip",[zip_names objectAtIndex:i]];
        NSString *path=[NSHomeDirectory()stringByAppendingPathComponent:[NSString stringWithString:name]];
           NSLog(@"-----%@",path);
        
        NSString *unZipTo;
        NSString *rang=[zip_names objectAtIndex:i];
　　　　　//　这块是为了找到下载的zip是那种，然后分开设置放到不同的文件夹里，
        if (([rang rangeOfString:@"large"].location!=NSNotFound)) {
            
            unZipTo = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/bigImage"];
        }else{
            
            unZipTo = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
        }
        
        if ([zip UnzipOpenFile:path])
        {
            [zip UnzipFileTo:unZipTo overWrite:YES];
            [zip UnzipCloseFile];
        }
    }

    if ([[zip_names objectAtIndex:0] rangeOfString:@"small"].location!=NSNotFound||[[zip_names objectAtIndex:0] rangeOfString:@"publicimg"].location!=NSNotFound) {
        [self writer];
    }else{
      NSLog(@"大图不需要写入");
  
}
写入的方法，当时想的是哦把图片存到plist文件了，
-(void)writer{
    //拿到应用程序沙盒里面的路径
//    NSArray *paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0];
    //读取存在沙盒里面的文件图片
    for (int i = 0; i < zip_names.count; i++) {
        if ([[zip_names objectAtIndex:i] isEqualToString:@"publicimg"] || [[zip_names objectAtIndex:i] isEqualToString:@"uppublicimg"]) {
            NSString *imgPath1=[NSHomeDirectory()stringByAppendingPathComponent:[NSString stringWithFormat:@"Documents/%@.json",[zip_names objectAtIndex:i]]];
            ////因为拿到的是个路径 把它加载成一个data对象
            NSData *data=[NSData dataWithContentsOfFile:imgPath1];
            NSDictionary *weatherDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:NULL];
            //判断登录是否正确
            //    NSString *str = [NSString stringWithFormat:@"%@",[weatherDic objectForKey:@"flag"]];
            //取出所有图片信息
            NSDictionary *season = [weatherDic objectForKey:@"season_img"];
            NSDictionary *season_line = [weatherDic objectForKey:@"line_season_img"];
//            NSDictionary *report_img = [weatherDic objectForKey:@"report_img"];
            NSDictionary *screen_img = [weatherDic objectForKey:@"screen_img"];
            //    NSLog(@"%@,%@,%@,%@,%@",wirte,season,season_line,report_img,screen_img);
            //    NSDictionary *line_name = [NSDictionary alloc];
            //写入plist
            //    NSString *filePath = [self dataFilePath];
            
            if ([DataPist shared].arryData ==Nil) {判断arryData是否存在，不存在的话，从新创建文件路径
                [DataPist shared].arryData = [[NSMutableDictionary alloc]init];
            }
            if ([[NSFileManager defaultManager] fileExistsAtPath:[self dataFilePath]]) {
                [DataPist shared].arryData  = [[NSMutableDictionary alloc]initWithContentsOfFile:[self dataFilePath]];
            }
            NSFileManager* fm = [NSFileManager defaultManager];
            [fm createFileAtPath:[self dataFilePath] contents:nil attributes:nil];
           
            if (![[NSString stringWithFormat:@"%@",[season objectForKey:@"img_null"]] isEqualToString:@"0"]) {
                [ [DataPist shared].arryData  setValuesForKeysWithDictionary:season];//这中setvalue的dic是直接写入的plsit里面添加的，他会自动写入key value，
            }
            if (![[NSString stringWithFormat:@"%@",[season_line objectForKey:@"img_null"]] isEqualToString:@"0"]) {
                [ [DataPist shared].arryData  setValuesForKeysWithDictionary:season_line];
            }
//            if (![[NSString stringWithFormat:@"%@",[report_img objectForKey:@"img_null"]] isEqualToString:@"0"]) {
//                [ [DataPist shared].arryData  setValuesForKeysWithDictionary:report_img];
//            }
            if (![[NSString stringWithFormat:@"%@",[screen_img objectForKey:@"img_null"]] isEqualToString:@"0"]) {
                [ [DataPist shared].arryData  setValuesForKeysWithDictionary:screen_img];
            }
        }
        else if([[zip_names objectAtIndex:i] rangeOfString:@"small"].location!=NSNotFound){
            NSString *imgPath1=[NSHomeDirectory()stringByAppendingPathComponent:[NSString stringWithFormat:@"Documents/%@.json",[zip_names objectAtIndex:i]]];
            ////因为拿到的是个路径 把它加载成一个data对象
            NSData *data=[NSData dataWithContentsOfFile:imgPath1];
            NSDictionary *weatherDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:NULL];
            
            NSDictionary *img_name = [weatherDic objectForKey:@"line_img"];
            if (![[NSString stringWithFormat:@"%@",[img_name objectForKey:@"img_null"]] isEqualToString:@"0"]) {
                [ [DataPist shared].arryData  setValuesForKeysWithDictionary:img_name];
            }
        }else{
            
        }
        
        
        [ [DataPist shared].arryData  setValue:line_img forKey:@"line_name"];
        //-------------------
        [ [DataPist shared].arryData  setValue:screen_id forKey:@"screen_id"];
        
        [ [DataPist shared].arryData  writeToFile:[self dataFilePath] atomically:YES];
        
    }
     isDown=@"1";
    
    [self downLoadAgain];
     [DataPist hideLoading];
    Choose_LineViewController *choose_Line = [[Choose_LineViewController alloc]init];
    [[NSUserDefaults standardUserDefaults] setObject:leftrightImageUrl forKey:@"leftOrRightUrl"];
    choose_Line.urlDic=leftrightImageUrl;
    [self presentViewController:choose_Line animated:YES completion:Nil];
}
//成功后的判断
-(void)downLoadAgain{
    NSString *uuid = [[UIDevice currentDevice] uniqueIdentifier];
    NSString *post = [NSString stringWithFormat:@"%@/api/flag.php?uid=%@&status=%@",[DataPist shared].ipString,uuid,isDown];
    NSURLRequest *request111 = [NSURLRequest requestWithURL:[NSURL URLWithString:post]];
    NSData *response = [NSURLConnection sendSynchronousRequest:request111 returningResponse:nil error:nil];
//    update_flg=@"1";
//    [[NSUserDefaults standardUserDefaults]setObject:update_flg forKey:@"update_flg"];
    
}

上面主要用到了常规的方法，还有强大的BOOl变量，可以判断许多东西方法是否执行，以后记得使用，

6：ipad上面的弹出视图：用下面这周方式，类似qq弹出设置界面的

 Setting_PageViewController *setting_page = [[Setting_PageViewController alloc]init];
    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:setting_page];
    nav.modalPresentationStyle=UIModalPresentationFormSheet;
    [self presentViewController:nav animated:YES completion:NULL];

如果弹出界面有多层的视图，可以使用这样push进去的，（用的是tableView的方法）

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    if (indexPath.section==0) {
        switch (indexPath.row) {
            case 0:
            {
                ScreenSaveAnimation_ViewController *SV=[[ScreenSaveAnimation_ViewController alloc]init];
                [self.navigationController pushViewController:SV animated:YES];
            }
                break;
            case 1:{
                ScreenSaveType_ViewController *ST=[[ScreenSaveType_ViewController alloc]init];
                [self.navigationController pushViewController:ST animated:YES];
                
            }break;
                
            default:
                break;
        }

push进去的视图，返回的时候也可以返回 [self.navigationController popViewControllerAnimated:YES];

在tableview中int n=[indexPath indexAtPosition:0];可以取到section的位置，主要用在tableview中的didSelectRowAtIndexPath方法里面，在点击此方式的时候，为了在列表的左边显示一个记号的话，可以在开始的时候在每个rows里都添加记号的按钮，先隐藏掉，设置tag，然后，在点击的时候通过tag让他显示出来，就是先把tableview上的view全部遍历一遍，都隐藏，然后找出你点击的view的tag，让他显示，别的也就都隐藏了，类似此类的代码

-(void)nextTag:(NSIndexPath *)indexPath{
    
    UIImageView *image;
    
    int n=[indexPath indexAtPosition:0];//区分section
    if (n==0) {
        for (int i=500; i<540; i++) {//先全部循环隐藏掉，
            image=(UIImageView *)[self.view viewWithTag:i];
            [image setHidden:YES];
        }
        image=(UIImageView *)[self.view viewWithTag:indexPath.row+500];//某一个显示
        image.hidden=NO;
        
    }else if (n==1){
        
        for (int i=500; i<540; i++) {
            image=(UIImageView *)[self.view viewWithTag:i];
            [image setHidden:YES];
        }
        image=(UIImageView *)[self.view viewWithTag:indexPath.row+510];
        image.hidden=NO;
        
    }else if (n==2){
        
        for (int i=500; i<540; i++) {
            image=(UIImageView *)[self.view viewWithTag:i];
            [image setHidden:YES];
        }
        image=(UIImageView *)[self.view viewWithTag:indexPath.row+520];
        image.hidden=NO;
        
    }else if (n==3){
        
        for (int i=500; i<540; i++) {
            image=(UIImageView *)[self.view viewWithTag:i];
            [image setHidden:YES];
        }
        
        image=(UIImageView *)[self.view viewWithTag:indexPath.row+530];
        image.hidden=NO;
    }
    
}

7 用button显示九宫格的的方法，

-(void)initImage:(int)number
{ 此方法主要用于现在在scrollview上分页加载显示图片的，
    int num = line_detailInfo.count - number*10;//判断line_detailInfo是总得图片数，
    //num11 判断行数
    int num11 = 0;
    //num22 判断列数
    int num22 = 0;
    
    if (num > 5) {
        num11 = 2;
    }else if(num <= 5 ){
        num11 = 1;
    }
    for (int M=0; M < num11; M++) {
        if (num >= 5) {
            num22 = 5;
        }else if(num < 5){
            num22 = num%5;
        }
        for (int i=0; i < num22; i++) {
            UIButton *btns = [UIButton buttonWithType:0];
//            [btns setImage:[UIImage imageNamed:[NSString stringWithFormat:@"a_%d.png",i]] forState:UIControlStateNormal];
            NSString *str;
            if (M == 0) {
               str  = [line_detailInfo objectAtIndex:i+number*10];
            }else if (M == 1){
                str  = [line_detailInfo objectAtIndex:i+number*10+5];
            }
            
            NSString *img_data = [NSString stringWithFormat:@"%@",[[DataPist shared].arryData objectForKey:[NSString stringWithFormat:@"s%@",str]]];
            [btns setImage:[UIImage imageWithData:[DataPist stringToByte:img_data]] forState:UIControlStateNormal];//显示图片
            if (M == 0) {
                btns.tag = i+number*10+100;
            }else if (M == 1){
                btns.tag = i+number*10+5+100;
            }
            
            [btns addTarget:self action:@selector(goNext:) forControlEvents:UIControlEventTouchUpInside];
            btns.frame = CGRectMake(1024*number+99+i*130+i*45,M*230+41*M+70, 130,230);
            [scroll addSubview:btns];
        }
        num = num - 5;
    }
}

下面的方法主要显示的在scrollview上面当加载到下一页的时候，当你放回的时候不用再加载

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
  int  n=scrollView.contentOffset.x/1024;
    if (n >= scor) {
        scor = n;
        [self initImage:n];
    }
}

用scrollview显示多张 图片，类似于图片浏览器

　　scroll=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 82, 1024, 630)];
    scroll.backgroundColor=[UIColor clearColor];
    scroll.showsVerticalScrollIndicator=NO;
    scroll.pagingEnabled=YES;
    scroll.delegate=self;
    scroll.showsVerticalScrollIndicator = FALSE;
    scroll.showsHorizontalScrollIndicator = FALSE;
    [self.view addSubview:scroll];底层的scrollview用于滑动和分页用的
  
//这MRZoomScrollView主要用与显示图片和放大图片的
for (int i = 0; i < imageArrys.count; i++) {
        zoomScrollView = [[MRZoomScrollView alloc]init];
        CGRect frame = scroll.frame;
        zoomScrollView.maximumZoomScale=2;
        zoomScrollView.minimumZoomScale=1;
        zoomScrollView.tag=2000+i;
        zoomScrollView.showsVerticalScrollIndicator = NO;
        zoomScrollView.showsHorizontalScrollIndicator=NO;
//        zoomScrollView.backgroundColor=[UIColor grayColor];
        frame.origin.x = frame.size.width * i;
        frame.origin.y = 0;
        zoomScrollView.frame = frame;
        [scroll addSubview:zoomScrollView];
   }
 scroll.contentSize=CGSizeMake(1024*imageArrys.count, 768);设置图片共有多少张
    [scroll setContentOffset:CGPointMake(1024*currentNum, 0) animated:YES];//设置点击小图进入大图的时候scroll停留在那个位置。

MRZoomScrollView自定义的类显示图片的scrollview
@interface MRZoomScrollView : UIScrollView <UIScrollViewDelegate>
{
    UIImageView *imageView;
}

@property (nonatomic, retain) UIImageView *imageView;


@end

#import "MRZoomScrollView.h"

#define MRScreenWidth      CGRectGetWidth([UIScreen mainScreen].applicationFrame)
#define MRScreenHeight     CGRectGetHeight([UIScreen mainScreen].applicationFrame)

@interface MRZoomScrollView (Utility)

- (CGRect)zoomRectForScale:(float)scale withCenter:(CGPoint)center;

@end

@implementation MRZoomScrollView

@synthesize imageView;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        
        self.delegate = self;
        self.frame = CGRectMake(0, 0, MRScreenWidth, MRScreenHeight);
        
        [self initImageView];
    }
    return self;
}

- (void)initImageView
{
    imageView = [[UIImageView alloc]init];
    
    // The imageView can be zoomed largest size
    imageView.frame = CGRectMake(224, 0, 576, 768);
    imageView.userInteractionEnabled = YES;
    [self addSubview:imageView];
   }

#pragma mark - Zoom methods

- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
    NSLog(@"------%@",NSStringFromCGSize(scrollView.contentSize));

    CGFloat offsetX = (scrollView.bounds.size.width > scrollView.contentSize.width)?
    (scrollView.bounds.size.width - scrollView.contentSize.width) * 0.5 : 0.0;
    CGFloat offsetY = (scrollView.bounds.size.height > scrollView.contentSize.height)?
    (scrollView.bounds.size.height - scrollView.contentSize.height) * 0.5 : 0.0;
    //    if (YES) {
    imageView.center = CGPointMake(scrollView.contentSize.width * 0.5 + offsetX,
                               scrollView.contentSize.height * 0.5 + offsetY);

}

#pragma mark - UIScrollViewDelegate

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
    return imageView;
}

#pragma mark - View cycle

@end

主要用于显示党scrollview滑动超过一屏时才执行的方法，
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    if (scrollView.contentOffset.x>1024*n||scrollView.contentOffset.x<=1024*(n-1)) {//判断是否滑动一屏
        n=scrollView.contentOffset.x/1024;
        [self initImage:n];
    }
}

苹果自带的简单的网络请求方法 并且解析数据

-(void)getInfoImage{
    NSString *urlString = [NSString stringWithFormat:@"%@/api/model_style.php?img_name=%@",[DataPist shared].ipString,[imageArrys objectAtIndex:tags]];
    
    NSURLResponse *urlResponce=nil;
    NSError *error=nil;
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
    NSData *Data=[NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponce error:&error];
    if (error) {
        [DataPist hideLoading];
        UIAlertView *alter=[[UIAlertView alloc]initWithTitle:@"提示" message:@"当前网络不可用,请稍后再试" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
        [alter show];
        return;
    }
    
    NSDictionary *weatherDic = [NSJSONSerialization JSONObjectWithData:Data options:NSJSONReadingMutableLeaves error:nil];

还有当滑动的时候清除一些控件的值，为了防止重叠，让他从新显示，如果用viewwithtag比较麻烦的话，可以使用简单的把需要从新赋值的控件放到一个view上面，然后通过移出view，新建view从新赋值，

8：如果客户端需要查询图片分类的方法。一般的情况是需要数据库的支持，但是为了方便的话，可以点击按钮，像服务器短发请求，通过服务器查询后返回需要的图片的显示，然后客户端接受图片，然后在沙盒里面查询，这样还快，比较简单，显示沙盒里面的图片的简单的方法如下

  NSString *name=[NSString stringWithFormat:@"%@",[imageArrys objectAtIndex:tags]];图片名
    NSString *ss=[NSString stringWithFormat:@"Documents/bigImage/%@",name];
    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",ss]];图片路径
    NSString *fileName=[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];/加载图片，转为字符串
    NSString *imageNames=[fileName stringByReplacingOccurrencesOfString:@"-" withString:@"1"];//解密加密的图片字符串

9 视频的加载用到的是AVQueuePlayer，简单的代码如下

//初始化播放器组件
-(void)initPlayer
{
    [arryItems removeAllObjects];
    
    for (int i = 0; i < 34; i++) {
        [arryMp3Name addObject:[NSString stringWithFormat:@"序列 %@",[arryImages objectAtIndex:i]]];
    }    for (NSString *text in arryMp3Name) {
        NSURL *playerFileURL = [[NSURL alloc] initFileURLWithPath: [[NSBundle mainBundle] pathForResource:text ofType:@"mp4"]];
        AVPlayerItem *item=[AVPlayerItem playerItemWithURL:playerFileURL];
        [arryItems  addObject:item];
    }
//    NSLog(@"arryItems==%d",arryItems.count);
    //添加播放下首歌的通知
    for (int songPointer = 0; songPointer < [arryItems count]; songPointer++) {
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(songEnded:)
                                                     name:AVPlayerItemDidPlayToEndTimeNotification
                                                   object:[arryItems objectAtIndex:songPointer]];
    }
    
    queuePlayer = [AVQueuePlayer queuePlayerWithItems:arryItems];
    playLayer = [AVPlayerLayer playerLayerWithPlayer:queuePlayer];
    playLayer.frame = CGRectMake(0, 82, 1024, 576);
    [self.view.layer addSublayer:playLayer];
    [queuePlayer play];
    
    playerView=[[UIView alloc]initWithFrame:CGRectMake(0,90, 1024, 576)];
    playerView.backgroundColor=[UIColor clearColor];
    playerView.userInteractionEnabled=YES;
    [self.view addSubview:playerView];
    
}
-(void)songEnded:(NSNotification *)notification{
//    NSLog(@"---%@",notification.object);
//    NSLog(@"--%d",n);
//    NSLog(@"-----------------------%d",littletag);
    if (Flag == YES) {
        n = littletag;
        Flag = NO;
    }
    //动画实现添加蒙板
    [UIView beginAnimations:@"Curl"context:nil];//动画开始
    [UIView setAnimationDuration:0.75];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    [(UIButton *)[self.view viewWithTag:n+1+1000] setAlpha:1];//主要是视频下面的饿缩略图的显示随着视频的播放显示
    [(UIButton *)[self.view viewWithTag:n+1000] setAlpha:0.2];
    [UIView commitAnimations];
    
    n++;
    //当n=34，播放到最后一个的时候，重新初始化播放器
    if (n==34) {
        n=0;
        [(UIButton *)[self.view viewWithTag:n+1000] setAlpha:1];
        [self initPlayer];
         [scoll setContentOffset:CGPointMake(0,scoll.contentOffset.y) animated:YES];
    }
    if(n>=10&&n<27){
        [scoll setContentOffset:CGPointMake(scoll.contentOffset.x+90,scoll.contentOffset.y) animated:YES];
    }
    
}
//返回到别的页面，要注销所有通知
//当返回上级时移除所有通知
- (void)releaseQueuePlayer
{
    n=0;
    for (int songPointer = 0; songPointer < [arryItems count]; songPointer++) {
        [[NSNotificationCenter defaultCenter] removeObserver:self
                                                     name:AVPlayerItemDidPlayToEndTimeNotification
                                                   object:[arryItems objectAtIndex:songPointer]];
    }
     
    [queuePlayer removeAllItems];
    [arryItems removeAllObjects];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:@"startMovie" object:nil];
    [queuePlayer pause];   
}
、、点击下面某个缩略图，播放某个视频，然后接着下面的后面的继续播放
//返回到到播放页面的方法
-(void)replayMovie:(NSNotification *)tag
{
//    NSLog(@"----%@",tag.object);
    [queuePlayer removeAllItems];
//    NSLog(@"***************%d",[tag.object intValue]);
    littletag=[tag.object intValue];
    for (int i = littletag; i <arryItems.count; i++) {
        AVPlayerItem* obj = [arryItems objectAtIndex:i];
        if ([queuePlayer canInsertItem:obj afterItem:nil]) {
            [obj seekToTime:kCMTimeZero];
            [queuePlayer insertItem:obj afterItem:nil];
        }
    }
    for (int i=0; i<34; i++) {
        [(UIButton *)[self.view viewWithTag:1000+i]setAlpha:0.2];
    }
    [(UIButton *)[self.view viewWithTag:littletag+1000]setAlpha:1];
    [queuePlayer play];
//    if(littletag>=10){
//        [scoll setContentOffset:CGPointMake(scoll.contentOffset.x+90,scoll.contentOffset.y) animated:YES];
//    }
}

上面就是项目中学到的东西，希望以后能注意，铭记