WKWebView的简单实用

#import "MyWebViewViewController.h"
#import <Webkit/WebKit.h>


@interface MyWebViewViewController ()<WKNavigationDelegate, WKScriptMessageHandler>

@property (nonatomic, strong) WKWebView *webView;

@end

@implementation MyWebViewViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    self.webView.navigationDelegate = self;
    [self.view addSubview:self.webView];
    
    // 设置偏好设置
//        WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
//        // 默认为0
//        config.preferences.minimumFontSize = 10;
//        //是否支持JavaScript
//        config.preferences.javaScriptEnabled = YES;
//        //不通过用户交互，是否可以打开窗口
//        config.preferences.javaScriptCanOpenWindowsAutomatically = NO;
    
//    NSURL *baseURL = [[NSBundle mainBundle] bundleURL];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://baidu.com"]];
//    [request addValue:[self readCurrentCookieWithDomain:@"http://baidu.com"] forHTTPHeaderField:@"Cookie"];
//    [_webView loadFileURL:request allowingReadAccessToURL:baseURL];

    [_webView loadRequest:request]; // 加载webView
    
    /*
    WKUserContentController *userCC = config.userContentController;
    //JS调用OC 添加处理脚本
    [userCC addScriptMessageHandler:self name:@"showMessage"];
    [userCC addScriptMessageHandler:self name:@"clickBack"];
    */
///  在添加下拉刷新时：self.webView.scrollView
    __weak typeof(self) weakSelf = self;
    self.webView.scrollView.mj_header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
        [weakSelf.webView loadRequest:request];
        
        [weakSelf.webView.scrollView.mj_header endRefreshing];
    }];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    
    /// 添加脚本处理程序 注意遵循WKScriptMessageHandler协议
    [self.webView.configuration.userContentController addScriptMessageHandler:self name:@"showMessage"];
    [self.webView.configuration.userContentController addScriptMessageHandler:self name:@"clickBack"];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    
    /// 注意：addScriptMessageHandler很容易引起循环引用，导致控制器无法被释放，所以必须在vc销毁前把它移除
    [self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"showMessage"];
    [self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"clickBack"];
}



// 获取js传递的数据
- (void)userContentController:(nonnull WKUserContentController *)userContentController didReceiveScriptMessage:(nonnull WKScriptMessage *)message {
    /// 两个主要参数 message.name:JS那边的方法名  message.body:JS传过来的参数 为id类型 NSArray,NSDictionary,NSString等等
    
//    NSLog(@"message.body = %@", message.body);
    
    if ([message.name isEqualToString:@"showMessage"]) {
        
        NSLog(@"message.body = %@", message.body);
        
    } else if ([message.name isEqualToString:@"clickBack"]) {
        
        NSLog(@"message.body = %@", message.body);
    }
     
    
    
}

//- (void)encodeWithCoder:(nonnull NSCoder *)coder {
//    <#code#>
//}
//
//- (void)traitCollectionDidChange:(nullable UITraitCollection *)previousTraitCollection {
//    <#code#>
//}
//
//- (void)preferredContentSizeDidChangeForChildContentContainer:(nonnull id<UIContentContainer>)container {
//    <#code#>
//}
//
//- (CGSize)sizeForChildContentContainer:(nonnull id<UIContentContainer>)container withParentContainerSize:(CGSize)parentSize {
//    <#code#>
//}
//
//- (void)systemLayoutFittingSizeDidChangeForChildContentContainer:(nonnull id<UIContentContainer>)container {
//    <#code#>
//}
//
//- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(nonnull id<UIViewControllerTransitionCoordinator>)coordinator {
//    <#code#>
//}
//
//- (void)willTransitionToTraitCollection:(nonnull UITraitCollection *)newCollection withTransitionCoordinator:(nonnull id<UIViewControllerTransitionCoordinator>)coordinator {
//    <#code#>
//}
//
//- (void)didUpdateFocusInContext:(nonnull UIFocusUpdateContext *)context withAnimationCoordinator:(nonnull UIFocusAnimationCoordinator *)coordinator {
//    <#code#>
//}
//
//- (void)setNeedsFocusUpdate {
//    <#code#>
//}
//
//- (BOOL)shouldUpdateFocusInContext:(nonnull UIFocusUpdateContext *)context {
//    <#code#>
//}
//
//- (void)updateFocusIfNeeded {
//    <#code#>
//}

// 懒加载
- (WKWebView *)webView {
    if (!_webView) {
        _webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.size.width, self.view.size.height)];
    }
    return _webView;
}

@end