问题
Maybe it's just me, but it seems like the bottom padding is greater than the top padding for the text in this UISegmentedControl. Why is this happening?
回答1:
The position is probably correct, but it looks wrong to your eye because room is left for a descender, and there are no descenders because the titles are all caps. Luckily, you can adjust the y-component of the content position! There are two ways:
In Interface Builder, in the attributes inspector for each segment, set the Content Offset
In code, call
setContentPositionAdjustment:forSegmentType:barMetrics:
来源：https://stackoverflow.com/questions/21617801/text-in-uisegmentedcontrol-not-exactly-centered