iOS WKWebView的使用

给HTML添加JS代码

NSString *js = @"function xx() {return '我是事先注入的JS代码';}";
//初始化WKUserScript对象
//WKUserScriptInjectionTimeAtDocumentEnd为网页加载完成时注入
WKUserScript *script = [[WKUserScript alloc] initWithSource:js injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
//根据生成的WKUserScript对象，初始化WKWebViewConfiguration
WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
[config.userContentController addUserScript:script];
    
self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:config];
[self.view addSubview:self.webView];

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"htmlTest" ofType:@"html"];
NSURL *url = [NSURL fileURLWithPath:filePath];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];

self.webView.UIDelegate = self;
self.webView.navigationDelegate = self;

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
    NSString *jsFun = [NSString stringWithFormat:@"xx()"];
    [self.webView evaluateJavaScript:jsFun completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
        NSLog(@"%@---%@",error,obj);
    }];
}

进度监听

self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:self.webView];
    
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"htmlTest" ofType:@"html"];
NSURL *url = [NSURL fileURLWithPath:filePath];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];

[self.webView addObserver:self forKeyPath:@"estimatedProgress" options:(NSKeyValueObservingOptionNew) context:nil];

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    NSLog(@"%@",change[@"new"]);
}

获取HTML标签值

    
        
            
    
    
        
你好!
        
    

self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:self.webView];
    
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"htmlTest" ofType:@"html"];
NSURL *url = [NSURL fileURLWithPath:filePath];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];
    
self.webView.UIDelegate = self;
self.webView.navigationDelegate = self;

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
    NSString *jsFun = @"document.getElementById('word').innerHTML";
    [self.webView evaluateJavaScript:jsFun completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
        NSLog(@"%@---%@",error,obj);
    }];
}

左滑返回

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OC调用JS方法传参/返回值

传递单个字符串:

注意要加单引号,返回值在block回调里面

NSString *jsFun = [NSString stringWithFormat:@"getJsCode('%@')",@"你好!”];
[self.webView evaluateJavaScript:jsFun completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
        NSLog(@"%@---%@",error,obj);
}];

传递json

NSDictionary *dict = @{
                           @"name": @"张三",
                           @"age": @(18)
                           };
NSData *data = [NSJSONSerialization dataWithJSONObject:dict
                                                   options:(NSJSONWritingPrettyPrinted)
                                                     error:nil];
NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
                     
NSString *jsFun = [NSString stringWithFormat:@"getJsCode(%@)",str];
[self.webView evaluateJavaScript:jsFun completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
    NSLog(@"%@---%@",error,obj);
}];

    
        
            
    
    
        
你好!
        
    

JS调用OC方法传参/返回值

WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:config];
[self.view addSubview:self.webView];
    
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"htmlTest" ofType:@"html"];
NSURL *url = [NSURL fileURLWithPath:filePath];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];
    
self.webView.UIDelegate = self;
self.webView.navigationDelegate = self;
[config.userContentController addScriptMessageHandler:self name:@"jsToOC"];

- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
    if ([message.name isEqualToString:@"jsToOC"]) {
        NSLog(@"---%@",message.body);
    }
}

    
        
            
    
    
        
你好!
        
    

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