//這個知識點主要是自己最近在嘗試寫后台接口 在移動端展示的時候需要用到這個知識點,在webViewDidFinishLoad方法里面執行一段js代碼 拿到各個圖片 判斷其寬度是否大於當前手機屏幕尺寸,是的話則調整為屏幕寬度顯示,不是的話則原樣顯示
代碼如下:
1 - (void)webViewDidFinishLoad:(UIWebView *)webView {
2 // 2、都有效果
3 NSString *js=@"var script = document.createElement('script');"
4 "script.type = 'text/javascript';"
5 "script.text = \"function ResizeImages() { "
6 "var myimg,oldwidth;"
7 "var maxwidth = %f;"
8 "for(i=0;i <document.images.length;i++){"
9 "myimg = document.images[i];"
10 "if(myimg.width > maxwidth){"
11 "oldwidth = myimg.width;"
12 "myimg.width = %f;"
13 "}"
14 "}"
15 "}\";"
16 "document.getElementsByTagName('head')[0].appendChild(script);";
17 js=[NSString stringWithFormat:js,[UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.width-15];
18 [webView stringByEvaluatingJavaScriptFromString:js];
19 [webView stringByEvaluatingJavaScriptFromString:@"ResizeImages();"];
20
21 }
參考鏈接:
