iOS Dev (54) 键盘弹出后收起时View随之移动

• 作者：大锐哥
• 博客：http://prevention.iteye.com

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添加监听

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

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

移除监听

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

事件处理函数

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

    NSDictionary *userInfo = [notification userInfo];
    NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGFloat keyBoardEndY = value.CGRectValue.origin.y;

    NSNumber *duration = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSNumber *curve = [userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey];

    [UIView animateWithDuration:duration.doubleValue animations:^{
        [UIView setAnimationBeginsFromCurrentState:YES];
        [UIView setAnimationCurve:[curve intValue]];
        self.view.center = CGPointMake(self.view.center.x, keyBoardEndY - STATUS_BAR_HEIGHT - self.view.bounds.size.height/2.0);
    }];
}

Reference

• http://www.cnblogs.com/programmer-blog/p/3265110.html