WKWebView+LhGray.m
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//
// WKWebView+LhGray.m
// SmartCity
//
// Created by luoh on 2021/3/25.
// Copyright © 2021 StarHome. All rights reserved.
//
#import "WKWebView+LhGray.h"
#import <objc/runtime.h>
//#import "SCConst.h"
@implementation WKWebView (LhGray)
+(void)lh_WKWebViewWizzldMethedWith:(BOOL)changeGray{
if (changeGray == false) {
return;
}
Method originalMethod = class_getInstanceMethod([self class], @selector(initWithFrame:configuration:));
Method swizzledMethod = class_getInstanceMethod([self class], @selector(lg_initWithFrame:configuration:));
method_exchangeImplementations(originalMethod, swizzledMethod);
}
- (instancetype)lg_initWithFrame:(CGRect)frame configuration:(WKWebViewConfiguration *)configuration {
// js脚本
NSString *jScript = @"var filter = '-webkit-filter:grayscale(100%);-moz-filter:grayscale(100%); -ms-filter:grayscale(100%); -o-filter:grayscale(100%) filter:grayscale(100%);';document.getElementsByTagName('html')[0].style.filter = 'grayscale(100%)';";
// 注入
WKUserScript *wkUScript = [[WKUserScript alloc] initWithSource:jScript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
WKUserContentController *userController = [[WKUserContentController alloc] init];
[userController addUserScript:wkUScript];
// 配置对象
WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init];
wkWebConfig.userContentController = userController;
configuration = wkWebConfig;
WKWebView *webView = [self lg_initWithFrame:frame configuration:configuration];
return webView;
}
@end