带有独立线程的NSURLConnection委托

Question

我使用MBProgressHUD作为指标。而且你知道它在执行其他方法时使用了单独的线程。当我想使用NSURLConnection时，其代表团没有正确呼叫。

在这里我有什么（@implementation文件）：

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    [self hudShowWithLabel]; 
} 

-(void)hudShowWithLabel { 
    HUD = [[MBProgressHUD alloc] initWithView: self.view]; 
    [self.view addSubview:HUD]; 

    HUD.delegate = self; 
    HUD.labelText = @"Loading"; 
    [HUD showWhileExecuting:@selector(myTask) onTarget:self withObject:nil animated:YES]; 
} 

-(void)myTask { 
    responseData = [NSMutableData data]; 
    NSLog(@"Is%@ main thread", ([NSThread isMainThread] ? @"" : @" NOT")); 
    NSString *requestURL = @"http://someurl"; 

    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:requestURL]]; 
    (void)[[NSURLConnection alloc] initWithRequest:request delegate: self];  
} 

在运行时，我可以看到，myTask不MainThread。我怎么能解决这个问题？

Answer 1

您可以在主线程揭开序幕NSURLConnection的：

[self performSelectorOnMainThread:@selector(start) withObject:nil waitUntilDone:YES]; 

而且选择的开端是：

- (void)start 
{ 
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:requestURL]]; 

    self.connection =[[NSURLConnection alloc] initWithRequest:request 
               delegate:self 
             startImmediately:NO]; 
    [self.connection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes]; 
    [self.connection start]; 
} 

还有上github一个例子。

Answer 2

NSURLConnection在另一个应该有运行循环的线程中运行。您可以尝试在您的线程的主要方法中为此运行循环添加代码：

while (!finished) 
{ 
    [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:1]]; 
}