辞职FirstResponder，随后出现处理问题(iPhone 5上的键盘被屏蔽或崩溃)

Question

我有以下工作流程：

Input in Textfield -> (Return key of TextField pressed: resignFirstResponder, IBAction of Button called) -> IBAction of Button: perform an intensive operation

问题是，在用resignFirstResponder解除键盘之前就开始了密集操作。正如在其他帖子中建议的那样（例如。https://stackoverflow.com/a/3452767/1685971)我尝试使用：

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    [self performSelector:@selector(ibActionMethod:) withObject:sender afterDelay:someTime];
    return YES;
}

这在模拟器或iPhone 4上运行良好，但会导致iPhone 5上运行崩溃（我无法理解，因为我没有使用performSelectorInBackground:withObject:）：

void _WebThreadLockFromAnyThread(bool): Obtaining the web lock from a thread other than the main thread or the web thread. UIKit should not be called from a secondary thread.
bool _WebTryThreadLock(bool): Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now...

我尝试的另一个选择是在的主线程中等待辞职FirstResponder

[textField performSelectorOnMainThread:@selector(resignFirstResponder) withObject:nil waitUntilDone:YES];

但这样一来，键盘仍然不会立即被忽略（可能是因为该方法只等待选择器resignFirstResponder的返回，而不等待键盘动画的完成

有什么解决办法吗？

Answer 1

试试这个

dispatch_async(dispatch_get_main_queue(), ^{
    // your button action
});

我也面临着同样的错误，通过上面的技巧解决了。

Answer 2

试试这个代码，

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
       [textField resignFirstResponder];
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        //your code here
        });
       return YES;

}