iOS 添加WKWebView导致控制器无法释放的问题

蓝清水

于 2022-10-14 16:38:30 发布

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分类专栏： iOS开发小技巧文章标签： ios

本文链接：https://blog.youkuaiyun.com/lrbtony/article/details/127323328

在WkWebView与JavaScript交互中，经常会在原生中注入MessageHandler,app中注入MessageHandler的方法

 WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];

 config.userContentController = [WKUserContentController new];

 //注入handler

 [config.userContentController addScriptMessageHandler:self name:@ HandlerName

这里我们发现在向JS中注入handler的时候强引用了self,最终导致内存泄漏

解决方法添加一个新类 WeakScriptMessageDelegate

@interface WeakScriptMessageDelegate : NSObject WKScriptMessageHandler 
@property (nonatomic, weak) id WKScriptMessageHandler scriptDelegate;
- (instancetype)initWithDelegate:(id WKScriptMessageHandler )scriptDelegate;
@implementation WeakScriptMessageDelegate
- (instancetype)initWithDelegate:(id WKScriptMessageHandler )scriptDelegate {

 self = [super init];

 if (self) {

 _scriptDelegate = scriptDelegate;

 }

 return self;

- (void)userContentController:(WKUserContentController *)user