2. WKUIDelegate
创建一个新的WKWebView
// 创建一个新的WebView
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures;
剩下三个代理方法全都是与界面弹出提示框相关的,针对于web界面的三种提示框(警告框、确认框、输入框)分别对应三种代理方法。
// 界面弹出警告框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(void (^)())completionHandler;
// 界面弹出确认框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler;
// 界面弹出输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler;
3. WKScriptMessageHandler
这个协议中包含一个必须实现的方法,这个方法是native与web端交互的关键,它可以直接将接收到的JS脚本转为OC或Swift对象。
// 从web界面中接收到一个脚本时调用
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message;
三、使用WKWebView重写
这里我们和之前的界面做了一点改动,之前OC调用JS的时候是进行弹框处理,这里我在写的时候,很郁闷,方法可以调用过去,但是唯独js的alert方法调用没有效果,所以这里采用了输出到div的形式,并增加了一个clear按钮
WKWebView不支持nib文件,所以这里需要使用代码初始化并加载WebView
WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
config.preferences.minimumFontSize = 18;
self.wkWebView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height/2) configuration:config];
[self.view addSubview:self.wkWebView];
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];
NSURL *baseURL = [[NSBundle mainBundle] bundleURL];
[self.wkWebView loadHTMLString:[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil] baseURL:baseURL];
OC端:
//1. JS调用OC 添加处理脚本
[userCC addScriptMessageHandler:self name:@"showMobile"];
[userCC addScriptMessageHandler:self name:@"showName"];
[userCC addScriptMessageHandler:self name:@"showSendMsg"];
// 在代理方法中处理对应事件
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
NSLog(@"%@",NSStringFromSelector(_cmd));
NSLog(@"%@",message.body);
if ([message.name isEqualToString:@"showMobile"]) {
[self showMsg:@"我是下面的小红 手机号是:18870707070"];
}
if ([message.name isEqualToString:@"showName"]) {
NSString *info = [NSString stringWithFormat:@"你好 %@, 很高兴见到你",message.body];
[self showMsg:info];
}
if ([message.name isEqualToString:@"showSendMsg"]) {
NSArray *array = message.body;
NSString *info = [NSString stringWithFormat:@"这是我的手机号: %@, %@ !!",array.firstObject,array.lastObject];
[self showMsg:info];
}
}
// 2. native调用js
- (IBAction)btnClick:(UIButton *)sender {
if (!self.wkWebView.loading) {
if (sender.tag == 123) {
[self.wkWebView evaluateJavaScript:@"alertMobile()" completionHandler:^(id _Nullable response, NSError * _Nullable error) {
//TODO
NSLog(@"%@ %@",response,error);
}];
}
if (sender.tag == 234) {
[self.wkWebView evaluateJavaScript:@"alertName('小红')" completionHandler:nil];
}
if (sender.tag == 345) {
[self.wkWebView evaluateJavaScript:@"alertSendMsg('18870707070','周末爬山真是件愉快的事情')" completionHandler:nil];
}
} else {
NSLog(@"the view is currently loading content");
}
}










