NSURLRequest 简单的网络请求

概述NSURLRequest 简单的网络请求

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NSURLRequest 简单的网络请求

- (voID)vIEwDIDLoad{    [super vIEwDIDLoad];         NSURL* url = [NSURL URLWithString:@"http://img21.mtime.cn/mg/2012/03/25/112544.76654880.jpg"];    _imageData = [[NSMutableData alloc] init];         //进度条    _pv = [[UIProgressVIEw alloc] initWithFrame:CGRectMake(50,50,220,20)];    [self.vIEw addSubvIEw:_pv];    [_pv release];              //创建一个请求  //NSURLRequest* request = [NSURLRequest requestWithURL:url];    NSURLRequest* request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:30];    //发送请求    [NSURLConnection connectionWithRequest:request delegate:self];} //接收响应头- (voID)connection:(NSURLConnection *)connection dIDReceiveResponse:(NSURLResponse *)response{    NSLog(@"接收到响应头");    [_imageData setLength:0];    //拿到响应体长度    NShttpURLResponse* res = (NShttpURLResponse*)response;    _length = [[res.allheaderFIElds objectForKey:@"Content-Length"] floatValue];    NSLog(@"length:%f",_length);    //是否 开启 网络开关 状态栏的    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;} //接收响应体,下载数据/* 0 1 2 3 4 5 6 7 8 9 0 1     2 3 4            5 6 7                 8 9 0 1 2 3 4 5 6 7 8 9 */- (voID)connection:(NSURLConnection *)connection dIDReceiveData:(NSData *)data{    NSLog(@"接收响应体");    //把每次下载的数据添加到一起    [_imageData appendData:data];         //刷新进度条    [_pv setProgress:_imageData.length / _length animated:YES];} //成功- (voID)connectionDIDFinishLoading:(NSURLConnection *)connection{    NSLog(@"成功");    UIImage* image = [UIImage imageWithData:_imageData];    self.vIEw.backgroundcolor = [UIcolor colorWithPatternImage:image];         [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;} //失败- (voID)connection:(NSURLConnection *)connection dIDFailWithError:(NSError *)error{    NSLog(@"失败");    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;}

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总结

以上是内存溢出为你收集整理的NSURLRequest 简单的网络请求全部内容，希望文章能够帮你解决NSURLRequest 简单的网络请求所遇到的程序开发问题。

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