WKWebView的使用

本篇文章的例子是我的一个Demo，我直接复制的.m文件，没有分开写，可能你只是部分需要，需要自己手动去摘取，不全面，以后我会追加的

#import "ViewController.h"
#import <Masonry.h>
#import <WebKit/WebKit.h>

@interface ViewController ()<WKNavigationDelegate,WKUIDelegate,WKScriptMessageHandler>
@property(nonatomic,strong)WKWebView *webView;
//设置加载进度条
@property (nonatomic,strong) UIProgressView *progressView;
@end
@implementation ViewController
- (UIProgressView *)progressView{
    if (!_progressView) {
        _progressView = [[UIProgressView alloc]initWithProgressViewStyle:UIProgressViewStyleDefault];
        // 设置进度条的色彩
        [_progressView setTrackTintColor:[UIColor colorWithRed:240.0/255 green:240.0/255 blue:240.0/255 alpha:1.0]];
        _progressView.progressTintColor = [UIColor orangeColor];
    }
    return _progressView;
}
-(WKWebView *)webView{
    if(!_webView){
        //WKWebViewConfiguration配置文件
        WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
        //允许视频播放
        config.allowsAirPlayForMediaPlayback = YES;
        // 允许在线播放
        config.allowsInlineMediaPlayback = YES;
        // 允许可以与网页交互，选择视图
        config.selectionGranularity = YES;
        // web内容处理池
        config.processPool = [[WKProcessPool alloc] init];
        // 是否支持记忆读取
        config.suppressesIncrementalRendering = YES;
        //自定义配置,一般用于 js调用oc方法(OC拦截URL中的数据做自定义操作)
        WKUserContentController * userContentController = [[WKUserContentController alloc]init];
        // 添加消息处理，注意：self指代的对象需要遵守WKScriptMessageHandler协议，结束时需要移除 这里是监听的时间方法，成功了之后执行WKScriptMessageHandler协议方法
        [userContentController addScriptMessageHandler:self name:@"shareIOS"];
        [userContentController addScriptMessageHandler:self name:@"closeWebViewIOS"];
        
        config.userContentController = userContentController;
        
        _webView = [[WKWebView alloc]initWithFrame:CGRectZero configuration:config];
        [_webView sizeToFit];//适应你设定的尺寸
//        _webView.allowsBackForwardNavigationGestures = YES;//开启手势触摸
        
        // 设置代理
        _webView.navigationDelegate = self;
        _webView.UIDelegate = self;
    }
    return _webView;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationController.navigationBarHidden = YES;
    

    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.xxxxx.com?a=b"]]];
    [self.view addSubview:self.webView];
    [self.webView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.offset(0);
        make.size.equalTo(self.view);
        make.top.offset(-20);
    }];
    [self.webView addSubview:self.progressView];
    [self.progressView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.left.right.offset(0);
        make.height.offset(2);
    }];
    
    // 给webview添加监听
    [self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{
    if ([keyPath isEqual:@"estimatedProgress"] && object == self.webView) {
        [self.progressView setAlpha:1.0f];
        [self.progressView setProgress:self.webView.estimatedProgress animated:YES];
        if (self.webView.estimatedProgress  >= 1.0f) {
            [UIView animateWithDuration:0.3 delay:0.3 options:UIViewAnimationOptionCurveEaseOut animations:^{
                [self.progressView setAlpha:0.0f];
            } completion:^(BOOL finished) {
                [self.progressView setProgress:0.0f animated:YES];
            }];
        }
    }else{
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}

#pragma mark ================ WKUIDelegate ================
// 警告框
-(void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
    NSLog(@"------------------------------------------------------------runJavaScriptAlertPanelWithMessage");
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"警告框" preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler();
    }]];
    
    [self presentViewController:alert animated:YES completion:NULL];
}

// 确认框
-(void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
    NSLog(@"------------------------------------------------------------runJavaScriptConfirmPanelWithMessage");
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"确认框" preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }]];
    [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(NO);
    }]];
    [self presentViewController:alert animated:YES completion:NULL];
}

// 输入框
-(void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable))completionHandler{
    NSLog(@"------------------------------------------------------------runJavaScriptTextInputPanelWithPrompt");
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"textinput" message:@"输入框" preferredStyle:UIAlertControllerStyleAlert];
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.textColor = [UIColor redColor];
    }];
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler([[alert.textFields lastObject] text]);
    }]];
    
    [self presentViewController:alert animated:YES completion:NULL];
    
}
// webview关闭时回调
- (void)webViewDidClose:(WKWebView *)webView NS_AVAILABLE(10_11, 9_0){
    
}
// 默认预览元素调用
- (BOOL)webView:(WKWebView *)webView shouldPreviewElement:(WKPreviewElementInfo *)elementInfo {
    
    NSLog(@"-----默认预览元素调用");
    return YES;
}
// 返回一个视图控制器将导致视图控制器被显示为一个预览。返回nil将WebKit的默认预览的行为。
- (nullable UIViewController *)webView:(WKWebView *)webView previewingViewControllerForElement:(WKPreviewElementInfo *)elementInfo defaultActions:(NSArray<id <WKPreviewActionItem>> *)previewActions {
    
    NSLog(@"----返回一个视图控制器将导致视图控制器被显示为一个预览。返回nil将WebKit的默认预览的行为。");
    return self;
}

// 允许应用程序向它创建的视图控制器弹出
- (void)webView:(WKWebView *)webView commitPreviewingViewController:(UIViewController *)previewingViewController {
    
    NSLog(@"----允许应用程序向它创建的视图控制器弹出");
    
}

// 显示一个文件上传面板。completionhandler完成处理程序调用后打开面板已被撤销。通过选择的网址，如果用户选择确定，否则为零。如果不实现此方法，Web视图将表现为如果用户选择了取消按钮。
- (void)webView:(WKWebView *)webView runOpenPanelWithParameters:(WKOpenPanelParameters *)parameters initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSArray<NSURL *> * _Nullable URLs))completionHandler {
    
    NSLog(@"----显示一个文件上传面板");
    
}

#pragma mark ================ WKScriptMessageHandler ================

//拦截执行网页中的JS方法
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
    
    //服务器固定格式写法 window.webkit.messageHandlers.名字.postMessage(内容);
    //客户端写法 message.name isEqualToString:@"名字"]
//    message.name是方法名字  message.body方法的参数
    NSLog(@"------------------------:%@     %@",message.name,message.body);
    
    if ([message.name isEqualToString:@"shareIOS"]) {
       //这里写事件
    }else if ([message.name isEqualToString:@"closeWebViewIOS"]){
       //这里写事件
    }
}
- (void)dealloc{
    [self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"shareIOS"];
    [self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"closeWebViewIOS"];
    
    
    [self.webView removeObserver:self forKeyPath:@"estimatedProgress"];
    [self.webView setNavigationDelegate:nil];
    [self.webView setUIDelegate:nil];
    
    
}
#pragma mark ================ WKNavigationDelegate ================
// 1 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    NSString *urlStr = navigationAction.request.URL.absoluteString;
    NSLog(@"1-------在发送请求之前，决定是否跳转  -->%@",urlStr);
//    if([urlStr hasPrefix:@"http:"]){
//        decisionHandler(WKNavigationActionPolicyAllow);如果跳转使用这个
//    }else{
//        decisionHandler(WKNavigationActionPolicyCancel);如果不跳转使用这个
//    }
    decisionHandler(WKNavigationActionPolicyAllow);
}

// 2 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
    NSLog(@"2-------页面开始加载时调用");
}

// 3 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
    /// 在收到服务器的响应头，根据response相关信息，决定是否跳转。decisionHandler必须调用，来决定是否跳转，参数WKNavigationActionPolicyCancel取消跳转，WKNavigationActionPolicyAllow允许跳转
    
    NSLog(@"3-------在收到响应后，决定是否跳转---:");
    
    decisionHandler(WKNavigationResponsePolicyAllow);

}

// 4 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
    NSLog(@"4-------当内容开始返回时调用");
}

// 5 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    NSLog(@"5-------页面加载完成之后调用");
}

// 6 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation {
    
    NSLog(@"6-------页面加载失败时调用");
}

// 接收到服务器跳转请求之后调用
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation {
    NSLog(@"-------接收到服务器跳转请求之后调用");
}

// 数据加载发生错误时调用
- (void)webView:(WKWebView *)webView didFailNavigation:(null_unspecified WKNavigation *)navigation withError:(NSError *)error {
    NSLog(@"----数据加载发生错误时调用");
}

// 需要响应身份验证时调用 同样在block中需要传入用户身份凭证
- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * _Nullable credential))completionHandler {
    //用户身份信息
    
    NSLog(@"----需要响应身份验证时调用 同样在block中需要传入用户身份凭证");
    
    NSURLCredential *newCred = [NSURLCredential credentialWithUser:@""
                                                          password:@""
                                                       persistence:NSURLCredentialPersistenceNone];
    // 为 challenge 的发送方提供 credential
    [[challenge sender] useCredential:newCred forAuthenticationChallenge:challenge];
    completionHandler(NSURLSessionAuthChallengeUseCredential,newCred);
}

// 进程被终止时调用
- (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView {
    NSLog(@"----------进程被终止时调用");
}

@end

以上是webview给OC传值，如果OC给webview给传值

//需要传递的数据
NSMutableDictionary *dic = [NSMutableDictionary new];
dic[@"token"] = @"11111";

NSData *data = [NSJSONSerialization dataWithJSONObject:dic options:(NSJSONWritingPrettyPrinted) error:nil];

NSString *jsonStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSString *js = [NSString stringWithFormat:@"window.iOSInfo = %@", jsonStr];
//传输的数据
WKUserScript *script = [[WKUserScript alloc] initWithSource:js injectionTime:(WKUserScriptInjectionTimeAtDocumentStart) forMainFrameOnly:YES];

[self.configuration.userContentController addUserScript:script];

webview调用js的方法

NSDictionary *dic = @{ @"username": @"lpp",@"sex": @"女"};
NSString *source = [NSString stringWithFormat:@"jsMethod.setUserInfo(%@)", [dic toJSONString]];
    [self.webView evaluateJavaScript:source completionHandler:^(id _Nullable callbackData, NSError * _Nullable error) {
        if (error) {
            NSLog(@"evaluate js setUserInfo fucntion error %@", error);
            return;
        }
}];