iOS 获取系统键盘UIKeyboard方法

  公司项目需求，需要让弹窗显示在键盘所在的图层之上，而不是在弹窗出现的时候消失（如图1）。系统弹窗出现的时候会使键盘暂时不显示，而这种效果显然不符合要求的，由于没想到更好的办法，只好从键盘自身的UIKeyboard做文章了，通过获取当前键盘的UIKeyboard，手动改变UIKeyboard的透明度来勉强实现需求效果（如图2）。

 

 

核心代码

//懒加载－－－自定义弹窗

-(ShowForgetView*)showForgetView{

    if(_showForgetView == nil)
    {

    _showForgetView = [[ShowForgetView alloc] initWithFrame:CGRectMake(

    (FULL_WIDTH - 246)/2, (FUll_HEIGHT - 100)/2,246,173)];

     _showForgetView.alpha = 0;

    }

    return _showForgetView;

}

-(void)clickfogotBtn:(id)sender{

    

    //1.添加弹窗

    UIWindow*keyWindow = [[UIApplicationsharedApplication].windows lastObject];

    

    [keyWindow addSubview:self.showForgetView];

    

    

    //2.获取当前键盘的keyboard

    UIView*keyboard = [self getKeyBoard];

    

    

    

    //3.设置动画效果

    [UIView animateWithDuration:.3 animations:^{

 

         self.showForgetView.alpha = 1;

         self.view.alpha = 0.8;

         keyboard.alpha = 0.3;

     }];

}

//获取键盘UIKeyboard

- (UIView *)getKeyBoard

{

    

    UIView *keyBoardView = nil;

    

    NSArray *windows = [[UIApplication sharedApplication]windows];

    

    for (UIWindow*window in [windows reverseObjectEnumerator])

    {

        keyBoardView = [self getKeyBoardInView:window];

        if (keyBoardView)

        {

         return keyBoardView;

        }

    }

    

    return nil;

}

- (UIView *)getKeyBoardInView:(UIView *)view

{

    for(UIView *subView in [view subviews])

    {

        if (strstr(object_getClassName(subView), "UIKeyboard"))

        {

            return subView;

        }else{

            

            UIView *tempView = [selfgetKeyboardInView:subView];

            if (tempView)

            {

                return tempView;

            }

        }

    }

    

    return nil;

 

}