/*(http)get请求和post请求的区别:
*1、post请求 请求地址和参数分离，比get更加安全
*2、get请求只能获取服务器的数据不能上传文件，而post两者都可以
*3、get请求在浏览器中字符串长度最大限制为1024,post 没有限制
*4、post 上传文件 文件大小不能超过4G
*/
四种body参数的组织方式，对应四种contentType: （一般都是用默认的第一种）
1、application/x-www-form-urlencoded 参数拼接形态:a=@"haha"&b=@"hehe"&c=@"houhou"
2、multipart/form-data 参数为文本或者二进制
3、application/json 参数为json格式
4、text/xml 参数为xml格式
【NSURLConnection POST用法】
NSURL *url = [NSURL URLWithString:urlStr];
//post请求用NSMutableURLRequest,可变request的请求头
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//设置数据的请求方式(GET/POST)为post请求*****
[request setHTTPMethod:@"POST"];
//设置请求参数的编码方式(请求头的一部分)，可以缺省不写
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
//将参数的字符串转换成NSData
NSData *data = [@"username=111&email=33333&password=22222" dataUsingEncoding:NSUTF8StringEncoding];
//设置参数的长度(请求头的一部分)可以不写
[request setValue:[NSString stringWithFormat:@"%d",[data length]] forHTTPHeaderField:@"Content-Length"];
//将参数的data作为请求体*****
[request setHTTPBody:data];
//<NSURLConnectionDataDelegate>
[NSURLConnection connectionWithRequest:request delegate:self];
【ASIFormDataRequest POST用法】
使用系统相册
1，找开系统相册
UIImagePickerController *ipc = [[UIImagePickerController alloc]init];//照片选择器
ipc.delegate = self;//<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
[self presentViewController:ipc animated:YES completion:nil];
//选择照片后触发用post上传
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSUserDefaults* ud = [NSUserDefaults standardUserDefaults];
NSString* urlStr = @"http://192.168.88.8/sns/my/upload_headimage.php";
NSString* m_auth = [ud objectForKey:@"m_auth"];
//获取点击的图片
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
//将图片转化为二进制数据
NSData* headData = UIImagePNGRepresentation(image);
//ASI中，进行post请求和文件上传用ASIFormDataRequest
//#import "ASIFormDataRequest.h"
ASIFormDataRequest* request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:urlStr]];
//可以缺省不写
[request setRequestMethod:@"POST"];
//普通的参数(key=value),如果有多个参数需要多次添加
[request setPostValue:m_auth forKey:@"m_auth"];
//[request addPostValue:m_auth forKey:@"m_auth"];
//需要上传文件(转成的二进制数据) fileName:图片的名称,ContentType:上传的文件类型,key为文件对应的参数名称
[request setData:headData withFileName:@"tmp.png" andContentType:@"image/png" forKey:@"headimage"];
//[request addData:headData withFileName:@"tmp.png" andContentType:@"image/png" forKey:@"headimage"];
//<ASIHTTPRequestDelegate>
request.delegate = self;
[request startAsynchronous];
[picker dismissViewControllerAnimated:YES completion:nil];
}
//点击照片选择器右侧按钮执行
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:nil];
}
#import "LoginViewController.h"
#import "Regist.h"
#import "ASIFormDataRequest.h"
#import "HomeViewController.h"
@interface LoginViewController ()<RegistViewControllerDelegate,ASIHTTPRequestDelegate>
@property (weak, nonatomic) IBOutlet UITextField *nameTF;
@property (weak, nonatomic) IBOutlet UITextField *passTF;
@end
@implementation LoginViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.navigationItem.title=@"Login";
}
- (IBAction)btnClick:(UIButton *)sender
{
[self.view endEditing:YES];
if (sender.tag==1) {
//登录接口
NSString *urlStr=@"http://10.0.8.8/sns/my/login.php";
//用asi窗前post请求需要用这个类
ASIFormDataRequest *request=[[ASIFormDataRequest alloc]initWithURL:[NSURL URLWithString:urlStr]];
//设置请求方式（asi使用post可以省略）
[request setRequestMethod:@"POST"];
//添加一个参数
[request setPostValue:_nameTF.text forKey:@"username"];
//又添加一个参数
[request setPostValue:_passTF.text forKey:@"password"];
request.delegate=self;
//加载请求
[request startAsynchronous];
} else {
Regist *rvc=[[Regist alloc]init];
rvc.delegate=self;
[self.navigationController pushViewController:rvc animated:YES];
}
}
-(void)requestFinished:(ASIHTTPRequest *)request
{
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:request.responseData options:0 error:nil];
if ([[dic objectForKey:@"code"]isEqualToString:@"login_success"]) {
//用户的身份标记
NSString *mauth=[dic objectForKey:@"m_auth"];
//将身份标记用mauth这个key存到ud里
NSUserDefaults *ud=[NSUserDefaults standardUserDefaults];
[ud setObject:mauth forKey:@"mauth"];
[ud synchronize];
HomeViewController *hvc=[[HomeViewController alloc]init];
[self.navigationController pushViewController:hvc animated:YES];
return;
}
UIAlertView *av=[[UIAlertView alloc]initWithTitle:[dic objectForKey:@"code"] message:[dic objectForKey:@"message"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[av show];
}
-(void)requestFailed:(ASIHTTPRequest *)request
{
NSLog(@"%s",__func__);
}
-(void)registSuccessWithName:(NSString *)name pass:(NSString *)pass
{
_nameTF.text=name;
_passTF.text=pass;
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
#import <UIKit/UIKit.h>
@protocol RegistViewControllerDelegate <NSObject>
-(void)registSuccessWithName:(NSString *)name pass:(NSString *)pass;
@end
@interface Regist : UIViewController
@property(nonatomic,assign)id<RegistViewControllerDelegate>delegate;
@end
#import "Regist.h"
@interface Regist ()<NSURLConnectionDataDelegate,UIAlertViewDelegate>
{
NSMutableData *_downloadData;
}
@property (weak, nonatomic) IBOutlet UITextField *nameTF;
@property (weak, nonatomic) IBOutlet UITextField *passTF;
@property (weak, nonatomic) IBOutlet UITextField *mailTF;
@end
@implementation Regist
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.navigationItem.title=@"Reglist";
_downloadData=[[NSMutableData alloc]init];
}
- (IBAction)saveClick:(UIButton *)sender {
[self.view endEditing:YES];
if (!_nameTF.text.length || !_passTF.text.length || !_mailTF.text.length) {
UIAlertView *av =[[UIAlertView alloc]initWithTitle:@"Massage" message:@"Please Write things" delegate:nil cancelButtonTitle:@"Yes" otherButtonTitles: nil];
[av show];
return;
}
//所有参数拼接成的字符串，作为请求体
NSString *bodyStr=[NSString stringWithFormat:@"username=%@&password=%@&email=%@",_nameTF.text,_passTF.text,_mailTF.text];
//接口（网址）部分，作为请求头
NSString *urlStr=@"http://10.0.8.8/sns/my/register.php";
NSURL *url=[NSURL URLWithString:urlStr];
//使用post联网需要可变的request
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:15];
//设置请求方式为POST（POST/GET）
[request setHTTPMethod:@"POST"];
//设置请求体（需要把参数的字符串转化成NSData）
[request setHTTPBody:[bodyStr dataUsingEncoding:NSUTF8StringEncoding]];
//加载请求
[NSURLConnection connectionWithRequest:request delegate:self];
[UIApplication sharedApplication].networkActivityIndicatorVisible=YES;
}
#pragma mark - NSRULConnection
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
_downloadData.length=0;
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[_downloadData appendData:data];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[UIApplication sharedApplication].networkActivityIndicatorVisible=NO;
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:_downloadData options:0 error:nil];
UIAlertView *av=[[UIAlertView alloc]initWithTitle:[dic objectForKey:@"code"] message:[dic objectForKey:@"message"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
[av show];
if ([[dic objectForKey:@"code"] isEqualToString:@"registered"]) {
av.tag = 1;
}
[av show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag == 1) {
[self.navigationController popToRootViewControllerAnimated:YES];
[self.delegate registSuccessWithName:_nameTF.text pass:_passTF.text];
} else {
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[UIApplication sharedApplication].networkActivityIndicatorVisible=NO;
NSLog(@"%s",__func__);
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
#import "HomeViewController.h"
#import "ASIFormDataRequest.h"
@interface HomeViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate,ASIHTTPRequestDelegate>
{
//图片选择控制器
UIImagePickerController *_ipc;
}
@property (weak, nonatomic) IBOutlet UIImageView *headView;
@end
@implementation HomeViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (IBAction)btnClick:(UIButton *)sender {
if (!_ipc) {
_ipc=[[UIImagePickerController alloc]init];
}
_ipc.delegate=self;
[self presentViewController:_ipc animated:YES completion:nil];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSLog(@"%@",info);
//将点击的图片显示到headView上
_headView.image=[info objectForKey:UIImagePickerControllerOriginalImage];
NSUserDefaults *ud=[NSUserDefaults standardUserDefaults];
NSString *mauth=[ud objectForKey:@"mauth"];
//创建一个asi的post请求
ASIFormDataRequest *request=[ASIFormDataRequest requestWithURL:[NSURL URLWithString:@"http://10.0.8.8/sns/my/upload_headimage.php"]];
//告诉服务器，要为哪个用户上传头像
[request setPostValue:mauth forKey:@"m_auth"];
//将图片转成NSData
NSData *imageData=UIImagePNGRepresentation(_headView.image);
//将图片转成NSData，第二个参数图片名，供后台参考，第三个文件类型，图片就用image/png，最后一个参数是后台规定的参数名
[request setData:imageData withFileName:@"2.png" andContentType:@"image/png" forKey:@"headimage"];
request.delegate=self;
[request startAsynchronous];
//让对应的图片选择器退出
[picker dismissViewControllerAnimated:YES completion:nil];
}
-(void)requestFinished:(ASIHTTPRequest *)request
{
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:request.responseData options:0 error:nil];
UIAlertView *av=[[UIAlertView alloc]initWithTitle:[dic objectForKey:@"code"] message:[dic objectForKey:@"message"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[av show];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end