iOS Team / ScioLive · Files

//
//  CNLiveWebViewController.m
//  CNLiveScioLive
//
//  Created by CNLive-zxw on 2018/9/20.
//  Copyright © 2018年 CNLive. All rights reserved.
//

#import "CNLiveWebViewController.h"
#import <WebKit/WebKit.h>

@interface CNLiveWebViewController ()<WKScriptMessageHandler,WKNavigationDelegate,WKUIDelegate>
@property(nonatomic,strong) WKWebView *webView;

@end

@implementation CNLiveWebViewController
- (void)viewDidAppear:(BOOL)animated{
    [self clearCache];
    [self cleanCacheAndCookie];
    
}
- (void)viewDidLoad {
    [super viewDidLoad];
    [self setUpNavigationBar];
    [self.view addSubview:self.webView];
    NSURL *path = [NSURL URLWithString:self.url];
    [self.webView loadRequest:[NSURLRequest requestWithURL:path]];
    [MBProgressHUD showHUDAddedTo:self.view animated:YES];

    // Do any additional setup after loading the view.
}
#pragma mark - UI
- (void)setUpNavigationBar{
    
    self.navigationController.navigationBar.barTintColor = Color_Blue;
    [self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];

    //左
    UIButton *headerButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 20, 44)];
    headerButton.layer.cornerRadius = 2.0;
    headerButton.layer.masksToBounds = true;
    [headerButton setImage:[UIImage imageNamed:@"cnlive_white_back"] forState:UIControlStateNormal];
    [headerButton addTarget:self action:@selector(goBack) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:headerButton];
    
    self.navigationItem.title = self.navTitle;
    
}

#pragma mark - WKNavigationDelegate
// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{
//    [MBProgressHUD showHUDAddedTo:self.view animated:YES];
}
// 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation{
    [MBProgressHUD hideHUDForView:self.view animated:YES];

}
// 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
    [MBProgressHUD hideHUDForView:self.view animated:YES];

}
// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation{
    [MBProgressHUD hideHUDForView:self.view animated:YES];

}
// 接收到服务器跳转请求之后调用
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation{
    
}
// 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
    
    NSLog(@"%@",navigationResponse.response.URL.absoluteString);
    //允许跳转
    decisionHandler(WKNavigationResponsePolicyAllow);
    //不允许跳转
    //decisionHandler(WKNavigationResponsePolicyCancel);
}
// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    
    NSLog(@"%@",navigationAction.request.URL.absoluteString);
    //允许跳转
    decisionHandler(WKNavigationActionPolicyAllow);
    //不允许跳转
    //decisionHandler(WKNavigationActionPolicyCancel);
}
#pragma mark - WKUIDelegate
// 创建一个新的WebView
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{
    return [[WKWebView alloc]init];
}
// 输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler{
    completionHandler(@"http");
}
// 确认框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler{
    completionHandler(YES);
}
// 警告框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
    NSLog(@"%@",message);
    completionHandler();

}
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
    if (message.body) {
        if ([message.name isEqualToString:@"goback"]) {
            [self.navigationController popViewControllerAnimated:YES];
            
        }
    }
}

- (void)dealloc {
    [[_webView configuration].userContentController removeScriptMessageHandlerForName:@"goback"];
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

#pragma mark - 懒加载
- (WKWebView *)webView {
    if (!_webView) {
        
        WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc]init];
        
        config.preferences = [WKPreferences new];
        config.preferences.minimumFontSize = 12;
        
        config.preferences.javaScriptEnabled = YES;
        config.preferences.javaScriptCanOpenWindowsAutomatically = YES;
        config.userContentController = [[WKUserContentController alloc]init];
        
        [config.userContentController addScriptMessageHandler:self name:@"goback"];
        
        _webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, MainScreenWidth, MainScreenHeight-NavBarHeight) configuration:config];
        _webView.navigationDelegate = self;
        _webView.UIDelegate = self;
        _webView.scrollView.bounces = NO;
        
    }
    return _webView;
}

#pragma mark - 清除缓存
/** 清理缓存的方法，这个方法会清除缓存类型为HTML类型的文件*/
- (void)clearCache {
    /* 取得Library文件夹的位置*/
    NSString *libraryDir = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask, YES)[0];
    /* 取得bundle id，用作文件拼接用*/
    NSString *bundleId  =  [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleIdentifier"];
    /*
     * 拼接缓存地址，具体目录为App/Library/Caches/你的APPBundleID/fsCachedData
     */
    NSString *webKitFolderInCachesfs = [NSString stringWithFormat:@"%@/Caches/%@/fsCachedData",libraryDir,bundleId];
    
    NSError *error;
    /* 取得目录下所有的文件，取得文件数组*/
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *fileList = [[NSArray alloc] init];
    //fileList便是包含有该文件夹下所有文件的文件名及文件夹名的数组
    fileList = [fileManager contentsOfDirectoryAtPath:webKitFolderInCachesfs error:&error];
    
    NSLog(@"路径==%@,fileList%@",webKitFolderInCachesfs,fileList);
    /* 遍历文件组成的数组*/
    for(NSString * fileName in fileList){
        /* 定位每个文件的位置*/
        NSString * path = [[NSBundle bundleWithPath:webKitFolderInCachesfs] pathForResource:fileName ofType:@""];
        /* 将文件转换为NSData类型的数据*/
        NSData * fileData = [NSData dataWithContentsOfFile:path];
        /* 如果FileData的长度大于2，说明FileData不为空*/
        if(fileData.length >2){
            /* 创建两个用于显示文件类型的变量*/
            int char1 =0;
            int char2 =0;
            
            [fileData getBytes:&char1 range:NSMakeRange(0,1)];
            [fileData getBytes:&char2 range:NSMakeRange(1,1)];
            /* 拼接两个变量*/
            NSString *numStr = [NSString stringWithFormat:@"%i%i",char1,char2];
            /* 如果该文件前四个字符是6033，说明是Html文件，删除掉本地的缓存*/
            if([numStr isEqualToString:@"6033"]){
                [[NSFileManager defaultManager] removeItemAtPath:[NSString stringWithFormat:@"%@/%@",webKitFolderInCachesfs,fileName] error:&error];
                continue;
            }
            
        }
    }
}

- (void)cleanCacheAndCookie {
    //清除cookies
    NSHTTPCookie *cookie;
    NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    for (cookie in [storage cookies]){
        [storage deleteCookie:cookie];
    }
    //清除WebView的缓存
    [[NSURLCache sharedURLCache] removeAllCachedResponses];
    NSURLCache * cache = [NSURLCache sharedURLCache];
    [cache removeAllCachedResponses];
    [cache setDiskCapacity:0];
    [cache setMemoryCapacity:0];
}

@end