问题
As we know the default icon size for the tabBar is 30x30 point. I have an icon with thin lines and the display property is not that good. Its edge is not sharp. But I find the tabBar icon of music.app is really pretty with sharp edge. Is there any trick I should know? Thanks in advance!
回答1:
It's 30x30 points, which could be either 30x30 pixels, or 60x60 pixels, depending if the device has a retina display or not. That image looks to be displayed on a retina device.
If you have an image, for example, named MusicTabIcon.png, have two versions...
- One @ 30x30 pixels named MusicTabIcon.png
- One @ 60x60 pixels named MusicTabIcon@2x.png
来源：https://stackoverflow.com/questions/10854999/make-a-fine-tabbar-icon