iOS8以后第三方键盘获取高度不对的问题

iOS8以后苹果可以安装第三方键盘，

通过断点我们会发现使用第三方键盘之后，

键盘将要弹出的方法：- (void)keyBoardWillShow:(NSNotification *)notification会执行三次，

三次的高度分别是:0:216:282。我们发现我们需要的是第三次的高度。

我们需要注册键盘隐藏和显示的通知：

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

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

 1 #pragma mark–键盘显示事件
 2
 3 - (void)keyboardWillShow:(NSNotification *)notification {
 4     CGFloat curkeyBoardHeight = [[[notification userInfo] objectForKey:@"UIKeyboardBoundsUserInfoKey"] CGRectValue].size.height;
 5     CGRect begin = [[[notification userInfo] objectForKey:@"UIKeyboardFrameBeginUserInfoKey"] CGRectValue];
 6     CGRect end = [[[notification userInfo] objectForKey:@"UIKeyboardFrameEndUserInfoKey"] CGRectValue];
 7
 8     // 第三方键盘回调三次问题，监听仅执行最后一次
 9     if(begin.size.height>0 && (begin.origin.y-end.origin.y>0)){
10
11         CGFloat keyBoardHeight = curkeyBoardHeight;
12
13         NSLog(@"第三次：%f",keyBoardHeight);
14         [UIView  animateWithDuration:0.05 animations:^{
15             self.bgView.hidden = NO;
16             self.commentToolView.y = kScreenHeight - keyBoardHeight - 44;
17
18         }];
19     }
20 }
21
22 #pragma mark–键盘隐藏事件
23
24 -(void)keyBoardDidHide:(NSNotification *)notification{
25     NSLog(@"键盘隐藏");
26     self.bgView.hidden = YES;
27     self.commentToolView.y = kScreenHeight;
28 }