1.创建wkwebview
- (instancetype)initWithFrame:(CGRect)frame configuration:(WKWebViewConfiguration *)configuration NS_DESIGNATED_INITIALIZER;
webview基于UIScrollView父类，
_webview.scrollView.bounces = NO; //如果是，则跳过内容的边缘并再次返回
WKUIDelegate,WKScriptMessageHandler,WKNavigationDelegate，设置三个代理
2.//遵守代理
_webview.UIDelegate = self;
_webview.navigationDelegate = self;
3.//设置WKWebViewConfiguration
_wkConfig = [[WKWebViewConfiguration alloc] init];
_wkConfig.userContentController = [[WKUserContentController alloc] init];
往其中加入一些js代码，防止字体变小或者变大
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];
[_wkConfig.userContentController addUserScript:wkUScript];
//与H5交互添加相对应的方法
[_wkConfig.userContentController addScriptMessageHandler:self name:@"方法名"];
//设置h5页面的最小字体
_wkConfig.processPool = [[WKProcessPool alloc] init];
WKPreferences *preferences = [WKPreferences new];
preferences.javaScriptCanOpenWindowsAutomatically = YES;
//设定最小字体
preferences.minimumFontSize= 13.0;
_wkConfig.preferences= preferences;
//响应H5调用的方法
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
//回传给H5数据
- (void)webView:(WKWebView*)webView didFinishNavigation:(WKNavigation*)navigation
{
NSString *jsStr = @"var awsdk = new Object();";
NSLog(@"jsStr===%@",jsStr);
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self.webview evaluateJavaScript:jsStr completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
NSLog(@"JS回调：-sss- %@ %@", obj, error);
}];
});
}
