Question

我认为这个方法

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

然后当我打开这个视图时，我已准备好在textField1中编写键盘了，这没问题。

但是当我显示一个简单的警报视图时

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

当我在警报视图中按“确定”时，我的键盘消失并自动重新出现。为什么我有这种效果？我可以留下这种效果吗？

Answer 1

尝试实现UITextFieldDelegate的方法

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField

示例实施：

- (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;
}

IOS：iPad上的AlertView和键盘问题

1 个答案: