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上一篇文章我们讲述了UIMenuController的使用.这一篇讲一讲原生的屏蔽.
对于UITextField、UITextView、UIWebView这三个.可以直接子类化,或者是分类,然后在.m里面重写- (BOOL)canPerformAction:(SEL)action withSender:(id)sender然后返回NO即可.
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
return NO;
}
但是对于WKWebView就不能这么做了,因为WKWebView不能子类化.经过一番搜索,发现可以用js的方法禁止.
// 禁止选择CSS
NSString *css = @"body{-webkit-user-select:none;-webkit-user-drag:none;}";
// CSS选中样式取消
NSMutableString *javascript = [NSMutableString string];
[javascript appendString:@"var style = document.createElement('style');"];
[javascript appendString:@"style.type = 'text/css';"];
[javascript appendFormat:@"var cssContent = document.createTextNode('%@');", css];
[javascript appendString:@"style.appendChild(cssContent);"];
[javascript appendString:@"document.body.appendChild(style);"];
// javascript注入
WKUserScript *noneSelectScript = [[WKUserScript alloc] initWithSource:javascript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
WKUserContentController *userContentController = [[WKUserContentController alloc] init];
[userContentController addUserScript:noneSelectScript];
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
configuration.userContentController = userContentController;
// WKWebView 初始化
WKWebView *webView = [[WKWebView alloc] initWithFrame:frame configuration:configuration];
//获取WKWebView选中的内容
NSString *highlighted = [_webView stringByEvaluatingJavaScriptFromString:@"window.getSelection().toString();"];