iOS：iPad上的AlertView和鍵盤問題

Question

我認為這種方法

- (void)viewWillAppear:(BOOL)animated{
[textField1 becomeFirstResponder];}

然后，當我打開此視圖時，我的鍵盤已准備好在textField1中寫入，沒關系。

但是當我顯示一個簡單的警報視圖時

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"ok!" 
                                                        message:@"It's all right"
                                                       delegate:nil 
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
    [alertView show];
    [alertView release];

當我在警報視圖中按“確定”時，鍵盤會消失，並在自動出現后重新出現。 為什么會有這種效果？ 我可以離開這個效果嗎？

Answer 1

嘗試實現UITextFieldDelegate的方法

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField

示例實現：

- (void)showAlertView
{
     // declared as @property (nonatomic, assign) BOOL shouldHideKeyboard
     self.shouldHideKeyboard = NO;

     // code to show alert view here
     // set the alert view's delegate to self
}

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    return self.shouldHideKeyboard;
}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    self.shouldHideKeyboard = YES;
}