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        UIWebView 中的字体大小与 iOS 字体大小不匹配

        Font sizes in UIWebView does NOT match iOS font size(UIWebView 中的字体大小与 iOS 字体大小不匹配)
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                  本文介绍了UIWebView 中的字体大小与 iOS 字体大小不匹配的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  这是一个 UILabel,上面写着关于".在 iOS 中设置为 17.7.

                  在它下面是一个 UIWebView,它也写着关于".也使用 css 设置为 17.7.

                  它们不匹配.

                  如何正确解决这个问题?

                  奇怪的是,在苹果自己的 UIWebView 中,大小基础不同?

                  要测试的 HTML...

                  <html><head><样式类型='文本/css'>身体 {边距:0px;字体系列:'SourceSansPro-Light';字体大小:FONTPOINTSpt;}html { -webkit-text-size-adjust:none;}</style></head><body leftmargin=0 topmargin=0>关于</body></html>

                  在设备或模拟器上的行为是相同的.

                  (注意,从

                  Here's a UILabel which says "About". Set at exactly 17.7 in iOS.

                  Below it a UIWebView which also says "About". Also set at exactly 17.7 using css.

                  They don't match.

                  How to fix this correctly?

                  It is bizarre that in Apple's own UIWebView, the size basis is different?

                  Html to test...

                  <html><head>
                  <style type='text/css'>
                  body {
                  margin: 0px;
                  font-family: 'SourceSansPro-Light';
                  font-size: FONTPOINTSpt;
                  }
                  html { -webkit-text-size-adjust:none; }
                  </style></head>
                  <body leftmargin=0 topmargin=0>
                  About
                  </body></html>
                  

                  Behavior is identical on device or simulator.

                  (Note, from here I learned the ratio is, perhaps 72.0/96.0.)

                  解决方案

                  If you want a 1 to 1 relationship between the font size that the UILabel uses and the font size that the UIWebView uses (via CSS) you have to use px instead of pt when defining the font size in your CSS.

                  Checkout this example HTML / CSS:

                  <html>
                      <head>
                          <style type='text/css'>
                              body {
                                 font-family: 'SourceSansPro-Regular';
                                 padding: 0
                              }
                              .point {
                                  font-size: 17pt
                              }
                              .pixel {
                                  font-size: 17px
                              }
                          </style>
                      </head>
                      <body>
                          <p class="point">About (17pt)<p>
                          <p class="pixel">About (17px)</p>
                      </body>
                  </html>
                  

                  When you add a UIWebView and a UILabel to your UIViewController and load the above HTML to the UIWebView and set the same font to the UILabel:

                  override func viewDidLoad() {
                      super.viewDidLoad()
                  
                      let webView = UIWebView(frame: CGRect(x: 25, y: 50, width:325 , height: 90))
                      view.addSubview(webView)
                  
                      let filePath = NSBundle.mainBundle().URLForResource("test", withExtension: "html")
                      webView.loadRequest(NSURLRequest(URL: filePath!))
                  
                      let label = UILabel(frame: CGRect(x: 25, y: 150, width: 325, height: 40))
                      label.font = UIFont(name: "SourceSansPro-Regular", size: 17)
                      label.text = "About (UILabel set to 17)"
                      view.addSubview(label)
                  }
                  

                  You get the following output:

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