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[操作系统]iOS中POST异步请求


POST异步请求(代理)

1、遵循<NSURLConnectionDataDelegate>

@interface ViewController ()<NSURLConnectionDataDelegate>

2、NSMutableData类型的reData属性是用来拼接数据的

@property (nonatomic,strong)NSMutableData *reDtata;

3、获取url

 NSString *urlString = @"http://api.tudou.com/v3/gw";  NSURL *url = [NSURL URLWithString:urlString];

4、创建request请求

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

5、设置HTTPMethod为POST请求(默认为GET请求)

request.HTTPMethod = @"POST";

6、设置HTTPBody(url中的body部分,如果body部分含有中文需要转化)

 NSString *bodyStr = @"method=album.channel.get&appKey=myKey&format=json&channel=c&pageNo=1&pageSize=15";  NSData *bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];  request.HTTPBody = bodyData;

7、创建连接并设置代理

 [NSURLConnection connectionWithRequest:request delegate:self];

8、实现代理方法

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{  self.reDtata = [NSMutableData data];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{  [_reDtata appendData:data];}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{  NSMutableDictionary *dic = [NSJSONSerialization JSONObjectWithData:_reDtata options:(NSJSONReadingAllowFragments) error:nil];  NSLog(@"%@",dic);}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{  }

 

 

 

下面是实现的所有代码

- (IBAction)postAsyc:(id)sender{}是从storyboard里面拖出来的控件代码,也可以直接写代码实现,写一个button和它的实现方法即可。
#import "ViewController.h"@interface ViewController ()<NSURLConnectionDataDelegate>@property (nonatomic,strong)NSMutableData *reDtata;@end@implementation ViewController- (void)viewDidLoad {  [super viewDidLoad];  // Do any additional setup after loading the view, typically from a nib.}- (IBAction)postAsyc:(id)sender {  NSString *urlString = @"http://api.tudou.com/v3/gw";  NSURL *url = [NSURL URLWithString:urlString];  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];  request.HTTPMethod = @"POST";  NSString *bodyStr = @"method=album.channel.get&appKey=myKey&format=json&channel=c&pageNo=1&pageSize=15";  NSData *bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];  request.HTTPBody = bodyData;  [NSURLConnection connectionWithRequest:request delegate:self];  }- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{  self.reDtata = [NSMutableData data];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{  [_reDtata appendData:data];}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{  NSMutableDictionary *dic = [NSJSONSerialization JSONObjectWithData:_reDtata options:(NSJSONReadingAllowFragments) error:nil];  NSLog(@"%@",dic);}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{  }- (void)didReceiveMemoryWarning {  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}@end