webView的缩放效果配置

NSString *meta = [NSString stringWithFormat:@"document.getElementsByName("viewport")[0].content = "width=self.view.frame.size.width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=5.0, user-scalable=yes""];

    [webView stringByEvaluatingJavaScriptFromString:meta];//(initial-scale是初始缩放比,minimum-scale=1.0最小缩放比,maximum-scale=5.0最大缩放比,user-scalable=yes是否支持缩放)
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原文地址：https://www.cnblogs.com/hanyutong/p/5290729.html