一、加载方式
1.-(void)loadRequest:(NSURLRequest *)request;
可以请求本地文件也可以请求网络资源
NSURL*fileURL = [[NSBundle mainBundle] URLForResource:@"test.html" withExtension:nil];
// fileURL= [NSURL URLWithString:@"https://www.baidu.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:fileURL];
[self.webView loadRequest:request];
2.-(void)loadHTMLString:(NSString *)htmlbaseURL:(NSURL *)url;
只能用于加载本地HTML文件
NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"test.html" withExtension:nil];
NSString *appHtml = [NSString stringWithContentsOfURL:fileURL encoding:NSUTF8StringEncoding error:nil];
[self.webView loadHTMLString:appHtmlbaseURL:fileURL];
二、代理设置
UIWebView代理设置
webView.delegate = self;
WKWebView代理设置
self.webView.navigationDelegate = self;
UIWebView与WKWebView相对应的代理
UIWebViewDeletage 一共四个方法
//刚开始加载网页，用于跳转的网页，也可不做任何跳转，也会用于对JS的交互
UIWebView —webView:shouldStartLoadWithRequest:navigationType:
WKWebView —webView:decidePolicyForNavigationAction:decisionHandler:
//已经开始加载网页
UIWebView —webViewDidStartLoad:
WKWebView —webView:didStartProvisionalNavigation:
//加载完成
UIWebView —webViewDidFinishLoad:
WKWebView —webView:didFinishNavigation:
//加载失败
UIWebView —webView:didFailLoadWithError:
WKWebView — webView:didFailLoadWithError:
三、替换中遇到的坑
1.问题:ionic 1不能兼容WKWebView
解决方法: 只能升级ionic了~~~
2.问题:Xib里不能直接拖WKWebView替换UIWebView，要重写loadView方法
解决方法:只是拖了一个UIView，再在代码中初始化WKWebView
3.问题:WKWebView不支持scalesPageToFit属性
解决方法:网上找的方法，在初始化时设置Configuration
[[WKWebView alloc] initWithFrame:CGRectZero configuration:configuration];
- (WKWebViewConfiguration *)configurationForScalesPageToFit {
NSString *jScript = @"var meta = document.createElement('meta');
meta.setAttribute('name', 'viewport'); meta.setAttribute('content',
'width=device-width');
document.getElementsByTagName('head')[0].appendChild(meta);";
WKUserScript*wkUScript = [[WKUserScript alloc] initWithSource:jScript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
WKUserContentController *wkUController = [[WKUserContentController alloc] init];
[wkUController addUserScript:wkUScript];
WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init];
wkWebConfig.userContentController= wkUController;
returnwkWebConfig;
}
4. 问题:cookies问题，有些请求需要cookies,原来的UIWebView是系统自动设置的，WKWebView需要手动设置.
解决方法: WKWebView手动设置cookies.
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//添加cookies;
NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
request.allHTTPHeaderFields = [NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
[self.webView loadRequest:request];
5.问题:stringByEvaluatingJavaScriptFromString方法在WKWebView不可用
解决方法: 用evaluateJavaScript:completionHandler代替,与JS交互
[self.pieWebView evaluateJavaScript:str completionHandler:nil];
6.问题:与JS交互的桥WebViewJavascriptBridge不支持WKWebView
解决方法:使用WKWebViewJavascriptBridge
7.问题:webView中的图片显示不出来，原因是跨域的图片，html没有带cookie
解决方法:拼接cookie，并且传入加载的html中通过
- (WKWebViewConfiguration *)createWebViewConfiguration {
WKUserContentController *userContrntController = [[WKUserContentController alloc] init];
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
configuration.userContentController= userContrntController;
WKProcessPool*processpool = [[WKProcessPool alloc] init];
configuration.processPool=processpool;
//给html cookie值
WKUserScript*cookieScript = [[WKUserScript alloc] initWithSource:[self cookieJavaScriptString] injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES];
[userContrntController addUserScript:cookieScript];
returnconfiguration;
}
//配置config，获取cookieString
- (NSString *)cookieJavaScriptString {
NSMutableString*cookieString = [[NSMutableString alloc] init];
NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
for (NSHTTPCookie*cookie incookies) {
NSString*excuteJSString = [NSString stringWithFormat:@"document.cookie='%@=%@';",cookie.name,cookie.value];
[cookieString appendString:excuteJSString];
}
returncookieString;
}