|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
//创建NSURL对象let url:NSURL! = NSURL(string:urlString)//创建请求对象let request:NSURLRequest = NSURLRequest(URL: url) let session = NSURLSession.sharedSession() let semaphore = dispatch_semaphore_create(0) let dataTask = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) -> Void in if error != nil{ print(error?.code) print(error?.description) }else{ let str = NSString(data: data!, encoding: NSUTF8StringEncoding) print(str) } dispatch_semaphore_signal(semaphore)}) as NSURLSessionTask //使用resume方法启动任务dataTask.resume() dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER)print("数据加载完毕！")//继续执行其他代码....... |
Swift - 使用NSURLSession同步获取数据（通过添加信号量）
原文：http://www.cnblogs.com/Free-Thinker/p/4858349.html