iOS12 WKWebView出现input 键盘页面上顶不下移解决方法

向右看齐 2022-03-15 08:58 1037阅读 0赞

1.如果是H5中只有一个input 参考 [https://juejin.im/post/5bfcbaccf265da615e0526ca][https_juejin.im_post_5bfcbaccf265da615e0526ca]

/// 监听将要弹起
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardShow) name:UIKeyboardWillShowNotification object:nil];
    /// 监听将要隐藏
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardHidden) name:UIKeyboardWillHideNotification object:nil];

/** 键盘谈起屏幕偏移量 */
    @property (nonatomic, assign) CGPoint keyBoardPoint;
    
    #pragma mark - addObserverKeyboard
    /// 键盘将要弹起
    - (void)keyBoardShow {
        CGPoint point = self.webView.scrollView.contentOffset;
        self.keyBoardPoint = point;
    }
    /// 键盘将要隐藏
    - (void)keyBoardHidden {
        self.webView.scrollView.contentOffset = self.keyBoardPoint;
    }

2.如果有多个input 就会出现很严重的问题，页面会下拉回去的动作，用户体验很不好。尝试了多种方法，找到了一种解决方案。

@property (nonatomic,assign) BOOL keyBoardHide;
    
            /// 监听将要弹起
            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardShow) name:UIKeyboardWillShowNotification object:nil];
            /// 监听将要隐藏
            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardHidden:) name:UIKeyboardWillHideNotification object:nil];
    
    
    
    #pragma mark - addObserverKeyboard
    / 键盘将要弹起
    - (void)keyBoardShow {
        self.keyBoardHide = NO;
    }
    / 键盘将要隐藏
    - (void)keyBoardHidden:(NSNotification *)notification{
       self.keyBoardHide = YES;
        CGFloat actionDelayTime = 0.04;
        __block double pianYi = self.webView.scrollView.contentOffset.y + DEVICE_HEIGHT - self.webView.scrollView.contentSize.height;
        __block CGPoint ontentOffset = CGPointMake(0, self.webView.scrollView.contentSize.height - DEVICE_HEIGHT);
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(actionDelayTime * NSEC_PER_SEC)),dispatch_get_global_queue(0, 0), ^{
            if (self.keyBoardHide) {
                NSDictionary *userInfo = notification.userInfo;
                // 动画的持续时间
                double duration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
                if (@available(iOS 12.0, *)) {
                      
                      dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)((duration-actionDelayTime) * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                          [UIView animateWithDuration:(duration-actionDelayTime) animations:^{
                              UIScrollView *scrollView = [self.webView scrollView];
                              if (pianYi > 0) {
                                  [scrollView setContentOffset:ontentOffset];
                              }
                          }];
                      });
    
                 }
                
            }
        }); 
        
    }

[https_juejin.im_post_5bfcbaccf265da615e0526ca]: https://juejin.im/post/5bfcbaccf265da615e0526ca