WKWebView基础
基础用法很简单，在.h文件中遵从代理协议WKUIDelegate,WKNavigationDelegate
在.m中初始化
切记
webView.UIDelegate = self;
webView.navigationDelegate = self;
这两步。
目前我方项目主要用这个来加载网页，所用的代理方法主要有5个：
第一个：网页加载成功
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
}
第二个：网页加载失败
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation {
}
第三个：收到响应后是否允许网页跳转
- (void)webView:(WKWebView *)w decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSString *urlStr = navigationAction.request.URL.absoluteString;
NSLog(@"webview urlStr = %@",urlStr);
if (navigationAction.targetFrame == nil) {
[webView loadRequest:navigationAction.request];
}
decisionHandler(WKNavigationActionPolicyAllow);
}
第四个：捕捉Alert提示框并显示
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(nonnull NSString *)message initiatedByFrame:(nonnull WKFrameInfo *)frame completionHandler:(nonnull void (^)(void))completionHandler {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:message message:nil preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
completionHandler();
}]];
[self presentViewController:alertController animated:YES completion:^{
}];
}
第五个：捕捉Confirm提示框并显示
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler {
// js 里面的alert实现，如果不实现，网页的alert函数无效 ,
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:message
message:nil
preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action) {
completionHandler(YES);
}]];
[alertController addAction:[UIAlertAction actionWithTitle:@"取消"
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action){
completionHandler(NO);
}]];
[self presentViewController:alertController animated:YES completion:^{}];
}
WKWebView的基本用法是这个，其他的还在研究中……
