iOS wkwebview懒加载中遇到的问题
1、懒加载传值问题
2、kvo监听影响 (报错:An instance 0x7fd9cb793f30 of class WKWebView was deallocated while key value observers were still registered with it. Current observation info: <NSKeyValueObservationInfo 0x7fd9cdca68b0>)
1、这是我遇到的问题,也许是个例,就算狗血了点吧
需求: 当前界面(mainVC)响应点击事件,传值给webviewController(webVC)其中包含网址,此时如果在webVC中对wkwebview进行懒加载并挂代理:
问题:在mainVC中调用webVC传值时,wkwebview的懒加载就开始了,,,此时如果传值中的网址为空值,webVC中的代理立马报错崩溃,没办法服务器就是会给空的,只能取消懒加载
//懒加载
-(WKWebView*)wkWebView{ //self.debugDescription WKWebViewConfiguration * Configuration = [[WKWebViewConfiguration alloc]init]; //允许视频播放 Configuration.allowsAirPlayForMediaPlayback = YES; // 允许在线播放 Configuration.allowsInlineMediaPlayback = YES; // 允许可以与网页交互,选择视图 Configuration.selectionGranularity = YES; // web内容处理池 Configuration.processPool = [[WKProcessPool alloc] init]; //自定义配置,一般用于 js调用oc方法(OC拦截URL中的数据做自定义操作) WKUserContentController * UserContentController = [[WKUserContentController alloc]init]; // 添加消息处理,注意:self指代的对象需要遵守WKScriptMessageHandler协议,结束时需要移除 [UserContentController addScriptMessageHandler:self name:@"yurong"]; // 是否支持记忆读取 Configuration.suppressesIncrementalRendering = YES; // 允许用户更改网页的设置 Configuration.userContentController = UserContentController; _wkWebView = [[WKWebView alloc] initWithFrame:CGRectMake(0, self.navigationBar.bottom, ScreenWidth, ScreenHeight-self.navigationBar.bottom) configuration:Configuration]; _wkWebView.backgroundColor = whiteCo; // 设置代理 _wkWebView.navigationDelegate = self; _wkWebView.UIDelegate = self; return _wkWebView; }
2、
//注意,观察的移除
-(void)dealloc{
if ([self isViewLoaded]) {
[self.wkWebView removeObserver:self forKeyPath:NSStringFromSelector(@selector(estimatedProgress))];
}
// if you have set either WKWebView delegate also set these to nil here
[self.wkWebView setNavigationDelegate:nil];
[self.wkWebView setUIDelegate:nil];
}