我真的很喜欢 iOS 7 中后退按钮箭头的形状，并且想在我的一个 UIButton 上使用它，但像 > 而不是
You have to use an image. These assets are in the original size from Apple. Here you go, simply right-click and save each one.
1x: 
2x: 
3x: 
Source: https://developer.apple.com/design/resources/ https://developer.apple.com/design/resources/
