1 #import "ViewController.h" 2 3 @interface ViewController () 4 @property (strong, nonatomic) NSMutableData *data; 5 @end 6 7 @implementation ViewController 8 9 - (void)viewDidLoad 10 { 11 [super viewDidLoad]; 12 // Do any additional setup after loading the view, typically from a nib. 13 NSString *url = @""; 14 url = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 15 NSURL *newUrl = [NSURL URLWithString:url]; 16 17 NSURLRequest*request=[[NSURLRequest alloc]initWithURL:newUrl cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:100.0];//设置缓存和超时 18 19 NSURLConnection*connection=nil; 20 21 connection=[[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:YES]; 22 } 23 24 -(void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse*)response 25 26 {//该方法在响应connection时调用 27 28 NSLog(@"response"); 29 30 self.data=[[NSMutableData alloc]init]; 31 32 NSHTTPURLResponse*httpResponse=(NSHTTPURLResponse*)response; 33 34 if(httpResponse&&[httpResponse respondsToSelector:@selector(allHeaderFields)]){ 35 36 NSDictionary*httpResponseHeaderFields=[httpResponse allHeaderFields]; 37 38 //mFileSize=[[httpResponseHeaderFields objectForKey:@"Content-Length"]longLongValue]; 39 40 }//获取文件文件的大小 41 42 } 43 44 -(void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error 45 46 {//出错时调用 47 48 NSLog(@"error"); 49 } 50 51 -(void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data 52 53 {//接受数据，在接受完成之前，该方法重复调用 54 55 NSLog(@"receive"); 56 57 [self.data appendData:data]; 58 // 59 // _displayLabel.text=[NSString stringWithFormat:(@"%6.1fkb/%6.1fkb"),[_datalength]/1024.0,mFileSize/1024.0]; 60 // 61 // [_progressViewsetProgress:[_datalength]/(float)mFileSize]; 62 63 } 64 65 -(void)connectionDidFinishLoading:(NSURLConnection*)connection 66 67 {//完成时调用 68 69 NSLog(@"Finish"); 70 71 NSString*filePath=[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0]stringByAppendingPathComponent:@"android.mp3"]; 72 73 [_data writeToFile:filePath atomically:NO];//将数据写入Documents目录。 74 75 NSLog(@"%@",filePath); 76 77 }