iOS WKWebView 加载过程中出现白屏的解决方案

 在放置webView的ViewController里添加以下代码

 

#pragma mark -- 解决首次加载白屏的问题 --
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    if (self.webView.title == nil) {
        [self.webView reload];
    }
}

 

 

遵守WKNavigationDelegate 协议
实现代理
#pragma mark - WKNavigationDelegate
- (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView NS_AVAILABLE(10_11, 9_0){

    [webView reload];

}

 

 

// 监听事件处理
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{
       if(object == self.webView && [keyPath isEqualToString:@"URL"]) {
        NSURL *newUrl = [change objectForKey:NSKeyValueChangeNewKey];
        NSURL *oldUrl = [change objectForKey:NSKeyValueChangeOldKey];

        if (objectIsNull(newUrl) && !objectIsNull(oldUrl)) {
            [self.webView reload];
        };
    }
}

staticinlineBOOLobjectIsNull(id obj) {

    if (obj == nil) {

        return YES;

    }

    if ([obj isKindOfClass:[NSString class]]) {

        return ((NSString *)obj).length == 0;

    }

    if ([obj isKindOfClass:[NSArray class]]) {

        NSArray *arr = (NSArray *)obj;

        return arr.count == 0;

    }

    if ([obj isKindOfClass:[NSDictionary class]]) {

        NSDictionary *dic = (NSDictionary *)obj;

        return dic.count == 0;

    }

    if ([obj isKindOfClass:[NSNull class]]) {

        return YES;

    }

    

    returnNO;

}

 

以上代码说是可以解决%90的WKWebView加载白屏，我加上之后暂时还没出现白屏