ios UIWebView支援縮放

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ios UIWebView支援縮放

1.定義一個宏:該宏js代碼可以使載入的網頁支援縮放功能

• 注意標紅屬性的功能
  

 #define QUOTE(...) #__VA_ARGS__
const char *webViewHeightJSString = QUOTE(
                                          var viewportmeta = document.querySelector(‘meta[name="viewport"]‘);
                                          if (viewportmeta) {
                                              viewportmeta.content = ‘width=device-width, initial-scale=1.0,      minimum-scale=1.0, maximum-scale=4.0, user-scalable=yes‘;
                                          }
                                          );
#undef QUOTE

2.在webview成功載入後,執行該段js代碼

[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithUTF8String:webViewHeightJSString]];

ios UIWebView支援縮放