下面我们仔细学习具体的细节。创建一个空的IOS项目，接着在创建一个ViewController。
AppDelegate.h 应用的代理类 这个没什么好说的就是直接打开刚刚创建的新ViewController。
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#import <UIKit/UIKit.h>
#import "TestViewController.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UINavigationController *navController;
@property (strong, nonatomic) UIViewController *viewController;
@end
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AppDelegate.m 在这里就是打开我们创建的TestViewController
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#import "AppDelegate.h"
@implementation AppDelegate
@synthesize window = _window;
@synthesize navController;
@synthesize viewController;
- (void)dealloc
{
[_window release];
[super dealloc];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.window.backgroundColor = [UIColor whiteColor];
self.viewController = [[TestViewController alloc]init];
self.navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
[self.window addSubview:navController.view];
[self.window makeKeyAndVisible];
return YES;
}
@end
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TestViewController.h 注意这里面引入了很多代理类。
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#import <UIKit/UIKit.h>
@interface TestViewController : UIViewController<UITextViewDelegate,UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate>
{
//输入框
UITextView *_textEditor;
//下拉菜单
UIActionSheet *myActionSheet;
//图片2进制路径
NSString* filePath;
}
@end
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TestViewController.m 请大家仔细看这个类， 所有的东西都写在了这里哈。
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#import "TestViewController.h"
@interface TestViewController ()
@end
@implementation TestViewController
- (void)viewDidLoad
{
[super viewDidLoad];
//导航栏标题
self.navigationItem.title = @"雨松MOMO输入框";
//导航栏按钮
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]
initWithTitle: @"发送"
style: UIBarButtonItemStyleDone
target: self
action: @selector(sendInfo)] autorelease];
//输入框显示区域
_textEditor = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, 320, 100)];
//设置它的代理
_textEditor.delegate = self;
_textEditor.autoresizingMask = UIViewAutoresizingFlexibleWidth;
_textEditor.keyboardType = UIKeyboardTypeDefault;
_textEditor.font = [UIFont systemFontOfSize:20];
_textEditor.text = @"请输入内容";
//默认软键盘是在触摸区域后才会打开
//这里表示进入当前ViewController直接打开软键盘
[_textEditor becomeFirstResponder];
//把输入框加在视图中
[self.view addSubview:_textEditor];
//下方的图片按钮 点击后呼出菜单 打开摄像机 查找本地相册
UIImage *image = [[UIImage alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"camera" ofType:@"png"]];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0, 120, image.size.width, image.size.height);
[button setImage:image forState:UIControlStateNormal];
[button addTarget:self action:@selector(openMenu) forControlEvents:UIControlEventTouchUpInside];
//把它也加在视图当中
[self.view addSubview:button];
}
-(void)openMenu
{
//在这里呼出下方菜单按钮项
myActionSheet = [[UIActionSheet alloc]
initWithTitle:nil
delegate:self
cancelButtonTitle:@"取消"
destructiveButtonTitle:nil
otherButtonTitles: @"打开照相机", @"从手机相册获取",nil];
[myActionSheet showInView:self.view];
[myActionSheet release];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
//呼出的菜单按钮点击后的响应
if (buttonIndex == myActionSheet.cancelButtonIndex)
{
NSLog(@"取消");
}
switch (buttonIndex)
{
case 0: //打开照相机拍照
[self takePhoto];
break;
case 1: //打开本地相册
[self LocalPhoto];
break;
}
}
//开始拍照
-(void)takePhoto
{
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
//设置拍照后的图片可被编辑
picker.allowsEditing = YES;
picker.sourceType = sourceType;
[picker release];
[self presentModalViewController:picker animated:YES];
}else
{
NSLog(@"模拟其中无法打开照相机,请在真机中使用");
}
}
//打开本地相册
-(void)LocalPhoto
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
//设置选择后的图片可被编辑
picker.allowsEditing = YES;
[self presentModalViewController:picker animated:YES];
[picker release];
}
//当选择一张图片后进入这里
-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
//当选择的类型是图片
if ([type isEqualToString:@"public.image"])
{
//先把图片转成NSData
UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *data;
if (UIImagePNGRepresentation(image) == nil)
{
data = UIImageJPEGRepresentation(image, 1.0);
}
else
{
data = UIImagePNGRepresentation(image);
}
//图片保存的路径
//这里将图片放在沙盒的documents文件夹中
NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
//文件管理器
NSFileManager *fileManager = [NSFileManager defaultManager];
//把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png
[fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
[fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];
//得到选择后沙盒中图片的完整路径
filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath, @"/image.png"];
//关闭相册界面
[picker dismissModalViewControllerAnimated:YES];
//创建一个选择后图片的小图标放在下方
//类似微薄选择图后的效果
UIImageView *smallimage = [[[UIImageView alloc] initWithFrame:
CGRectMake(50, 120, 40, 40)] autorelease];
smallimage.image = image;
//加在视图中
[self.view addSubview:smallimage];
}
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
NSLog(@"您取消了选择图片");
[picker dismissModalViewControllerAnimated:YES];
}
-(void)sendInfo
{
NSLog(@"图片的路径是：%@", filePath);
NSLog(@"您输入框中的内容是：%@", _textEditor.text);
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
@end
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如下图所示，打开下拉菜单按钮开始选择打开相机 或者 打开本地相册。模拟器中是无法打开照相机的的，切记。
如下图所示，这里就是我本地的相册啦，里面保存了几张图片，选择一张即可。
我在这里再说说图片上传， 图片上传我们采用的是2进制ASIHTTPRequest 来完成的。
发送请求
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NSString *server_base = [NSString stringWithFormat:@"%@/users/uploadResource.json", _server];
ASINetworkQueue *queue = [[ASINetworkQueue alloc] init];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:server_base]];
[ASIHTTPRequest setShouldUpdateNetworkActivityIndicator: NO];
[request setDelegate :self];
[request setDidFinishSelector:@selector(sendCommentSucc:)];
[request setDidFailSelector:@selector(sendCommentFail:)];
// res 就是 需要上传图片文件的路径
[request setFile:res forKey:@"res"];
[queue addOperation:request];
[queue go];
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最后是文本的源码，雨松MOMO祝大家学习愉快，不早了，我也得睡觉啦，1点多了。。。
下载地址：http://vdisk.weibo.com/s/accm9
- 本文固定链接: http://www.xuanyusong.com/archives/1493
- 转载请注明: 雨松MOMO 2012年07月19日 于 雨松MOMO程序研究院 发表