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WKWebView比之之前使用的UIWebView更加具有优势,UIWebView更加的笨重,UIWebView占用更多的内存,且内存的峰值更加的夸张,WKWebView加载的速度也更快,而且其更多的支持HTML5的特性,官方宣称的高达60fps的公洞刷新率以及内置的手势。
以下是一些WKWebView的一些使用方法及代理方法
加载链接和UIWebView类似
懒加载方法:
- (WKWebView *)webView {
if (_webView == nil) {
// js配置
WKUserContentController *userContentController = [[WKUserContentController alloc] init];
[userContentController addScriptMessageHandler:self name:@"webViewLoadStart"];
[userContentController addScriptMessageHandler:self name:@"webViewLoadFinish"];
[userContentController addScriptMessageHandler:self name:@"webViewLogout"];
[userContentController addScriptMessageHandler:self name:@"webViewSuccess"];
// WKWebView的配置
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
configuration.userContentController = userContentController;
// 显示WKWebView
_webView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:configuration];
_webView.UIDelegate = self; // 设置WKUIDelegate代理
_webView.navigationDelegate = self; // 设置WKNavigationDelegate代理
[self.view addSubview:_webView];
}
return _webView;
}
在其中的
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message方法中主要是收到JS的回执脚本就会运行一次
可以在这个方法里面进行app和js的交互
下面是WKUIDelegate一些代理的方法,可以用于输入框,弹出窗的使用
和UIWebView类似的加载,成功,失败的代理方法类似
/// 1 页面开始加载
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation;
/// 2 开始获取到网页内容时返回
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation;
/// 3 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;
/// 4 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation;
#pragma mark - WKUIDelegate
#pragma mark alert弹出框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
NSLog(@"%s", __FUNCTION__);
// 确定按钮
UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
completionHandler();
}];
// alert弹出框
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:message message:nil preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:alertAction];
[self presentViewController:alertController animated:YES completion:nil];
}
#pragma mark Confirm选择框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(nonnull NSString *)message initiatedByFrame:(nonnull WKFrameInfo *)frame completionHandler:(nonnull void (^)(BOOL))completionHandler {
NSLog(@"%s", __FUNCTION__);
// 按钮
UIAlertAction *alertActionCancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
// 返回用户选择的信息
completionHandler(NO);
}];
UIAlertAction *alertActionOK = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler(YES);
}];
// alert弹出框
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:message message:nil preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:alertActionCancel];
[alertController addAction:alertActionOK];
[self presentViewController:alertController animated:YES completion:nil];
}
#pragma mark TextInput输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(nonnull NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(nonnull WKFrameInfo *)frame completionHandler:(nonnull void (^)(NSString * _Nullable))completionHandler {
NSLog(@"%s",__FUNCTION__);
// alert弹出框
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:prompt message:nil preferredStyle:UIAlertControllerStyleAlert];
// 输入框
[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.placeholder = defaultText;
}];
// 确定按钮
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
// 返回用户输入的信息
UITextField *textField = alertController.textFields.firstObject;
completionHandler(textField.text);
}]];
// 显示
[self presentViewController:alertController animated:YES completion:nil];
}
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原文地址:http://www.cnblogs.com/Acee/p/5305535.html