在使用WKWebView和js交互時(shí)，會(huì)發(fā)現(xiàn)不走dealoc方法，也就是沒有釋放。經(jīng)查，問(wèn)題出現(xiàn)在注冊(cè)方法那行代碼，eg:

[config.userContentController addScriptMessageHandler:self name:@"close"];

config是生成WKWebView需要的配置類WKWebViewConfiguration，它注冊(cè)方法是會(huì)對(duì)self引用，而我是吧WkWebView作為一個(gè)屬性，這樣就發(fā)生了循環(huán)引用，

界面辦法發(fā)是生成一個(gè)代理類,名字為：WeakScriptMessageDelegate

WeakScriptMessageDelegate.h

#import <Foundation/Foundation.h>
#import <WebKit/WebKit.h>
@interface WeakScriptMessageDelegate : NSObject<WKScriptMessageHandler>

@property (nonatomic, weak) id<WKScriptMessageHandler> scriptDelegate;

- (instancetype)initWithDelegate:(id<WKScriptMessageHandler>)scriptDelegate;

@end

WeakScriptMessageDelegate.m

#import "WeakScriptMessageDelegate.h"

@implementation WeakScriptMessageDelegate

- (instancetype)initWithDelegate:(id<WKScriptMessageHandler>)scriptDelegate {
    self = [super init];
    if (self) {
        _scriptDelegate = scriptDelegate;
    }
    return self;
}

- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
    [self.scriptDelegate userContentController:userContentController didReceiveScriptMessage:message];
}


@end

將代碼

[config.userContentController addScriptMessageHandler:self name:@"close"];

改成

[config.userContentController addScriptMessageHandler:[[JFTWeakScriptMessageDelegate alloc] initWithDelegate:self] name:@"close"];

即可。