键盘出现时移动UIView

Question

我有两个UITextViews,一个位于UIView顶部的另一个UIView底部.

我使用此代码,在键盘出现时移动UIView.

  - (void) viewDidLoad
{

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

[[NSNotificationCenter defaultCenter] addObserver:self
                                selector:@selector(keyboardWillHide)
                                    name:UIKeyboardWillHideNotification
                                  object:nil];

}


-(void)keyboardWillShow {
    // Animate the current view out of the way
    [UIView animateWithDuration:0.3f animations:^ {
        self.frame = CGRectMake(0, -160, 320, 480);
    }];
}

-(void)keyboardWillHide {
    // Animate the current view back to its original position
    [UIView animateWithDuration:0.3f animations:^ {
        self.frame = CGRectMake(0, 0, 320, 480);
    }];
}

当我从底部使用UITextView时,它工作得很好.但是我的问题是,当我想使用UIView顶部的UITextView时,键盘出现,UIView向上移动,但我的顶级UITextView也向上移动.请帮助我,如果用户想要从顶部在UITextView上键入文本,我不想移动UIView.

Answer 1

我在项目中使用的一个非常简单的方法是TPKeyboardAvoiding库.

https://github.com/michaeltyson/TPKeyboardAvoiding

下载源代码,将4个文件放入项目中.在InterfaceBuilder中,确保TextViews位于UIScrollView或UITableView中,然后将该滚动视图或tableview的类更改为TPAvoiding子类.

如果您不想这样做,您的另一个选择是检查正在使用哪个TextView,并且仅在您想要的键盘是选定的键盘时进行动画处理,即:

-(void)keyboardWillShow {
    // Animate the current view out of the way
   if ([self.textFieldThatNeedsAnimation isFirstResponder]) {
        [UIView animateWithDuration:0.3f animations:^ {
        self.frame = CGRectMake(0, -160, 320, 480);
        }];
        self.animated = YES;
    }
}

-(void)keyboardWillHide {
    // Animate the current view back to its original position
    if (self.animated) {
      [UIView animateWithDuration:0.3f animations:^ {
          self.frame = CGRectMake(0, 0, 320, 480);
      }];
      self.animated = NO;
    }
}