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我想检测某些 UItextField 和 UItextView 何时被编辑，以便运行动画。我以这种方式解决了这个问题：

-(void)textFieldDidBeginEditing: (UITextField *)textField{
NSLog(@"sowing keyboard");

if ((textField == timebegin)||(textField == timeend)||(textField == number)||(textField == costlist)||(textField == costnormal)||(textField == newmessagename)||(textField == noteView))     {

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
}else{

}
}

-(void)textFieldDidEndEditing: (UITextField *)textField{
NSLog(@"hiding keyboard");

}

-(void)textViewDidBeginEditing: (UITextView *)textView{
NSLog(@"sowing keyboard");

if (textView == generalDetails) {

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
}else{

}
}

-(void)textViewDidEndEditing: (UITextView *)textView{
NSLog(@"hiding keyboard");

}

- (void)keyboardDidHide:(NSNotification *)aNotification {

[[NSNotificationCenter defaultCenter] removeObserver:self name: UIKeyboardDidHideNotification object:nil];

[[NSNotificationCenter defaultCenter] removeObserver:self name: UIKeyboardWillShowNotification object:nil];

 NSLog(@"hiding keyboard");

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.27];
scroll1.frame = CGRectMake(0, -340, 768, 1004);
[UIView commitAnimations];

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.37];
scroll2.frame = CGRectMake(0, 678, 768, 1004);
[UIView commitAnimations];

[self.mapView setHidden:NO];
    addImageForCommentingButton.hidden = NO;

//fade in
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationDelegate:self];

[self.mapView setAlpha:1.0];
    [addImageForCommentingButton setAlpha: 1.0];

[UIView commitAnimations];

}

- (void)keyboardWillShow:(NSNotification *)notification {

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.27];
scroll1.frame = CGRectMake(0, -604, 768, 1004);
[UIView commitAnimations];

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.47];
scroll2.frame = CGRectMake(0, 414, 768, 1004);
 [UIView commitAnimations];



[UIView animateWithDuration:1.0
             animations:^{
                 self.mapView.alpha=0.0;
                 [addImageForCommentingButton setAlpha: 0.0];
             }
             completion:^(BOOL finished){
                 self.mapView.hidden=YES;
                 addImageForCommentingButton.hidden = YES;
             }];
}

当我开始编辑名称在 if 语句中的 UItextField 之一时，将添加观察者并运行 showKeyboard 方法中的动画。这与 UItextView 一般细节不同。当我开始编辑它时，动画没有运行，好像代码没有被调用，但是它被调用了，并且添加了观察者（我从 NSlog 理解了这一点）。关键是 UItextView 和 UItextField 的代码是相同的，那么如何一个工作而另一个不工作呢？

4

2 回答 2

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通过这样做解决：

-(void)textViewDidBeginEditing: (UITextView *)textView{
NSLog(@"sowing keyboard textView");

if (textView == generalDetails) {

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

    [self keyboardWillShow];

}else{

}
}

很奇怪，我认为方法keyboardWillShow根本没有被调用

于 2013-02-02T14:36:36.180 回答
0

如果添加[self keyboardWillShow]解决了问题，那么您的方法可能没有正确实施。keyboardWillShow并且keyboardWillShow:是两种不同的方法。

如果要keyboardWillShow:调用通知，则必须将其定义如下：

- (void) keyboardWillShow: (NSNotification*) notification
{
}
于 2013-02-21T18:38:45.110 回答