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我有一個登錄視圖，用戶將用於登錄到我的應用程序。 我使用NSURLConnection Asynchrounous請求塊連接到我的Web服務並來回傳遞數據。iOS - NSURLConnection異步請求一次，然後失敗（掛起）第二次嘗試
我有一個奇怪的問題，如果用戶第一次登錄，它工作正常。但是，如果他們註銷，然後嘗試再次登錄請求發送，但從來沒有響應（我設置所有場景的alertviews;即超時，數據=無，錯誤！=零等）。它只是與我顯示的加載屏幕坐在那裏，並從不做任何事情。
我是否錯過了什麼？
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
{
if ([data length] > 0 && error == nil){
if(data != nil) {
//Handle Data Here
.............
} else {
[loadingView removeFromSuperview];
loadingView = nil;
BlockAlertView *alert = [BlockAlertView alertWithTitle:@"Network Error" message:@"Network connection was successful, but there was a problem with data transfer.\nPlease try again."];
[alert setCancelButtonWithTitle:@"OK" block:nil];
[alert show]; }
}
else if ([data length] == 0 && error == nil){
[loadingView removeFromSuperview];
loadingView = nil;
BlockAlertView *alert = [BlockAlertView alertWithTitle:@"Network Error" message:@"Network connection was successful, but there was a problem with data transfer.\nPlease try again."];
[alert setCancelButtonWithTitle:@"OK" block:nil];
[alert show];
}
else if (error != nil && error.code == NSURLErrorTimedOut){
[loadingView removeFromSuperview];
loadingView = nil;
BlockAlertView *alert = [BlockAlertView alertWithTitle:@"Network Error" message:@"The network request timed out.\nPlease check your internet connection and try again."];
[alert setCancelButtonWithTitle:@"OK" block:nil];
[alert show];
}
else if (error != nil){
[loadingView removeFromSuperview];
loadingView = nil;
BlockAlertView *alert = [BlockAlertView alertWithTitle:@"Network Error" message:@"There was a problem connecting to the network.\nPlease check your internet connection and try again."];
[alert setCancelButtonWithTitle:@"OK" block:nil];
[alert show];
}
}];