iOS中POST异步请求

来源:互联网 时间:1970-01-01

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;@[email protected] 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

 


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