关于数据流NSOutputStream

#import "URL.h"

@interface URL ()

//文件输出流
@property(nonatomic,strong) NSOutputStream * fileStream;

@end

@implementation URL

- (void)viewDidLoad {
[super viewDidLoad];

self.webView = [[UIWebView alloc]initWithFrame:self.view.bounds];

[self.view addSubview:self.webView];

[self outputStream];

}

//输出流
-(void)outputStream{

//创建统一资源定位符
NSURL *url = [NSURL URLWithString:@"http://localhost/001--NSURLConnection.wmv.pbb"];

//创建网络请求
NSURLRequest *request = [NSURLRequest requestWithURL:url];

NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:YES];

}

//接收头信息
- (void)connection:(NSURLConnection )connection didReceiveResponse:(NSURLResponse )response{

NSString *path = [@"/Users/xiaojie/Desktop/xiaoxiao" stringByAppendingPathComponent:response.suggestedFilename];

[[NSFileManager defaultManager]removeItemAtPath:path error:NULL];

self.fileStream = [[NSOutputStream alloc]initToFileAtPath:path append:YES];

[self.fileStream open];

}

//不断接收数据
- (void)connection:(NSURLConnection )connection didReceiveData:(NSData )data{

[self.fileStream write:data.bytes maxLength:data.length];

}

//数据传输完毕
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{

[self.fileStream close];

}
@end