302 lines
11 KiB
Objective-C
302 lines
11 KiB
Objective-C
//
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// XJBaseWebViewVC.m
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// ScarHousekeeper
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//
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// Created by 张小万 on 2021/1/21.
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//
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#import "XJBaseWebViewVC.h"
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@interface XJBaseWebViewVC ()<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
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// 以下三个属性声明后未使用，暂时保留
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//@property (nonatomic, strong)NSURL *originalUrl;
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//@property (nonatomic, copy)NSString *videoUrl;
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//@property (nonatomic, copy)NSString *messageType;
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@end
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// ── 弱引用代理 ──────────────────────────────────────────────────────────────
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// WKUserContentController 对 addScriptMessageHandler 的 handler 是强引用。
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// 如果直接传 self，self → wkWebView → configuration → userContentController → self，
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// 形成循环引用，VC 永远无法释放。
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// 解决方案：用一个弱引用中间对象转发消息。
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@interface XJWeakScriptMessageHandler : NSObject <WKScriptMessageHandler>
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@property (nonatomic, weak) id<WKScriptMessageHandler> delegate;
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+ (instancetype)handlerWithDelegate:(id<WKScriptMessageHandler>)delegate;
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@end
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@implementation XJWeakScriptMessageHandler
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+ (instancetype)handlerWithDelegate:(id<WKScriptMessageHandler>)delegate {
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XJWeakScriptMessageHandler *handler = [[XJWeakScriptMessageHandler alloc] init];
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handler.delegate = delegate;
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return handler;
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}
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- (void)userContentController:(WKUserContentController *)userContentController
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didReceiveScriptMessage:(WKScriptMessage *)message {
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[self.delegate userContentController:userContentController didReceiveScriptMessage:message];
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}
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@end
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// ────────────────────────────────────────────────────────────────────────────
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@implementation XJBaseWebViewVC
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#pragma mark - LifeCycle
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- (void)viewDidLoad {
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[super viewDidLoad];
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self.view.backgroundColor = [UIColor whiteColor];
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self.isHidenNaviBar = false;
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[self addNavigationItemWithImageNames:@[@"whiteBack_icon"] isLeft:YES target:self action:@selector(backVC) tags:@[@""]];
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[self addSubviews];
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if (self.webTitle) {
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self.navigationItem.title = self.webTitle;
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}
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}
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- (void)backVC {
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[self.navigationController popViewControllerAnimated:YES];
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}
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- (void)dealloc {
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// 移除所有 scriptMessageHandler，配合 XJWeakScriptMessageHandler 彻底避免内存泄漏
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WKUserContentController *ucc = self.wkWebView.configuration.userContentController;
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[ucc removeScriptMessageHandlerForName:@"JSCallback"];
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[ucc removeScriptMessageHandlerForName:@"htmlBack"];
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[ucc removeScriptMessageHandlerForName:@"finishActivity"];
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}
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- (void)viewWillAppear:(BOOL)animated{
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[super viewWillAppear:animated];
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if (_wkWebView) {
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_wkWebView.navigationDelegate = self;
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_wkWebView.UIDelegate = self;
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_wkWebView.allowsBackForwardNavigationGestures = true;
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}
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}
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- (void)viewWillDisappear:(BOOL)animated{
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[super viewWillDisappear:animated];
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_wkWebView.navigationDelegate = nil;
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_wkWebView.UIDelegate = nil;
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// ⚠️ 以下代码会清除整个 App 的所有 Cookie，影响其他模块登录状态，已注释
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// NSHTTPCookie *cookie;
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// NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
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// for (cookie in [storage cookies]) {
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// [storage deleteCookie:cookie];
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// }
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// [[NSURLCache sharedURLCache] removeAllCachedResponses];
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// [self clearWebViewCache];
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}
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#pragma mark - Create UI
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- (void)addSubviews{
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WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
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WKPreferences *preferences = [[WKPreferences alloc]init];
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// preferences.javaScriptEnabled = YES;
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preferences.javaScriptCanOpenWindowsAutomatically = YES;
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preferences.minimumFontSize = 10;
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configuration.preferences = preferences;
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// ── 统一使用 configuration 自带的 userContentController ──────────────────
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// Bug 修复：原先在下方又新建了 wkUController 并覆盖 configuration.userContentController，
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// 导致此处注册的 JSCallback / htmlBack 被丢弃，永远收不到 JS 消息。
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// Bug 修复：改用 XJWeakScriptMessageHandler 代理，防止循环引用内存泄漏。
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XJWeakScriptMessageHandler *weakHandler = [XJWeakScriptMessageHandler handlerWithDelegate:self];
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[configuration.userContentController addScriptMessageHandler:weakHandler name:@"JSCallback"];
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[configuration.userContentController addScriptMessageHandler:weakHandler name:@"htmlBack"];
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[configuration.userContentController addScriptMessageHandler:weakHandler name:@"finishActivity"]; // 不带参数的调用
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// 原写法（已废弃）：直接传 self 会造成循环引用
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// [configuration.userContentController addScriptMessageHandler:self name:@"JSCallback"];
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// [configuration.userContentController addScriptMessageHandler:self name:@"htmlBack"];
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// ────────────────────────────────────────────────────────────────────────
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//防止搜索框自动放大 注入js代码
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// 原代码中 userController 声明后从未使用，已移除
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// WKUserContentController *userController = [WKUserContentController new];
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NSString *jScript = @"var script = document.createElement('meta');script.name = 'viewport';script.content='width=device-width,user-scalable=no';document.getElementsByTagName('head')[0].appendChild(script);";
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WKUserScript *wkUScript = [[WKUserScript alloc] initWithSource:jScript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
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// 原写法（已废弃）：新建 wkUController 并覆盖 configuration.userContentController，
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// 导致上方注册的 JSCallback / htmlBack 全部失效
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// WKUserContentController * wkUController = [[WKUserContentController alloc] init];
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// [wkUController addScriptMessageHandler: self name: @"finishActivity"];
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// [wkUController addUserScript:wkUScript];
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// configuration.userContentController = wkUController;
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[configuration.userContentController addUserScript:wkUScript];
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self.wkWebView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 0, WIDTH, MyViewHEIGHT) configuration:configuration];
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self.wkWebView.navigationDelegate = self;
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self.wkWebView.UIDelegate = self;
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if (@available(iOS 11.0, *)) {
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self.wkWebView.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
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}
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[self.view addSubview:self.wkWebView];
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self.wkWebView.scrollView.bounces = false;//禁止滑动
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[self webViewRequest];
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/*
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[self.wkWebView evaluateJavaScript:@"htmlBack" completionHandler:^(id _Nullable response, NSError * _Nullable error) {
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NSLog(@"response: %@ error: %@", response, error);
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if (response) {
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[self back];
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}
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}];
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*/
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}
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- (void)finishActivity {
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}
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- (void)webViewRequest{
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NSString *urlString = self.webUrl;
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[self hiddenAllMBProgressHUD];
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if (urlString.length > 0) {
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[self showMBProgressHUDOnlyWithString:@"加载中"];
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NSURL *url = [NSURL URLWithString:urlString];
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NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
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if (self.wkWebView) {
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[self.wkWebView loadRequest:urlRequest];
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}
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}
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}
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#pragma mark - WKNavigationDelegate
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- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
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if ([message.name isEqualToString:@"JSCallback"]) {
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if (message.body) {
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NSData *jsonData = [message.body dataUsingEncoding:NSUTF8StringEncoding];
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NSError *err;
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NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
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options:NSJSONReadingMutableContainers
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error:&err];
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if(err) {
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}
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WkJSMessageType messageType = [[dic objectForKey:@"messageType"] intValue];
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switch (messageType) {
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case WkJSMessageTypeBack:{
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// [self.navigationController popViewControllerAnimated:YES];
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}
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break;
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default:
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break;
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}
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}
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} else if ([message.name isEqualToString:@"htmlBack"]) {
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[[NSNotificationCenter defaultCenter] postNotificationName:@"fromWebToReloadData" object:nil];
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}
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}
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#pragma mark - WKScriptMessageHandler
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- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {
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[self hiddenAllMBProgressHUD];
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if (!navigationAction.targetFrame.isMainFrame) {
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[webView loadRequest:navigationAction.request];
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}
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return nil;
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}
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- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{
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if (!self.webTitle) {
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self.title = @"加载中...";
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}
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}
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- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation{
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[self hiddenAllMBProgressHUD];
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if (!self.webTitle) {
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self.title = webView.title;
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}
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}
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- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(nonnull NSError *)error{
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[self hiddenAllMBProgressHUD];
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}
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#pragma mark - ACTION
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- (void)ToClickNavRight:(UIButton *)button{
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}
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#pragma mark - 自定义
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- (void)onBackClicked{
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if (self.wkWebView.canGoBack) {
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[self.wkWebView goBack];
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} else {
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// 原写法：只清缓存没有 pop，页面会卡住
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// [self clearWebViewCache];
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[self clearWebViewCache];
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[self.navigationController popViewControllerAnimated:YES];
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}
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}
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- (void)clearWebViewCache{
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if (iOS9Later) {
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NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
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NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
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[[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
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DLog(@"-----clear webView cache success------");
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}];
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} else {
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NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0];
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NSString *cookiesFolderPath = [libraryPath stringByAppendingString:@"/Cookies"];
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NSError *errors;
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[[NSFileManager defaultManager] removeItemAtPath:cookiesFolderPath error:&errors];
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if (!errors) {
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DLog(@"-----clear wkWebView cache success------");
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}
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}
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}
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- (NSString *)URLEncodedString:(NSString *)urlString{
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NSString *encodePath;
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encodePath = [urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
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return encodePath;
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}
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#pragma mark - SETTER
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// setRightType: 与自动合成的 setter 完全相同，无需 override，保留注释备查
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//- (void)setRightType:(RightNavType)rightType{
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// _rightType = rightType;
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//}
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- (void)setWebUrl:(NSString *)webUrl{
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_webUrl = webUrl;
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[self webViewRequest];
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}
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@end
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