NSURLConnection简单使用（一）

NSString *urlString        = [NSString stringWithFormat:@"http://cnblogs.com/时光"];
// 如果url中有中文，必须encode
NSString *encodedUrlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

// 1，创建NSURL
NSURL *url                 = [NSURL URLWithString:encodedUrlString];
// 2，创建Request
NSURLRequest *request      = [NSURLRequest requestWithURL:url];
// 3，连接
// queue: 指的是Block将要执行的queue，一般都是mainQueue
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
    // 主线程，queue=[NSOperationQueue mainQueue]
    NSLog(@"%@", [NSThread currentThread]);
}];

NSLog(@"%@", urlString);
NSLog(@"%@", encodedUrlString)

2015-03-28 16:00:37.366 Demo1[1248:42662] http://cnblogs.com/时光
2015-03-28 16:00:37.367 Demo1[1248:42662] http://cnblogs.com/时光
2015-03-28 16:00:37.484 Demo1[1248:42662] <NSThread: 0x7fbb91e04b50>{number = 1, name = main}