问题
I am a designer trying to design my typography for mobile apps. I have a question regarding how "accessibility" will affect the font sizes.
As in Android, you can change the font size scale from tiny to huge. By default it is "Small".
As I play around with the font size, it seems to me that some font sizes within an app will change and some will not. How can I tell which font will be affected by accessibility and which will not?
Similar to iOS as well, how well accessibility affect the font sizes?
回答1:
You can use dp for fixed pixel font sizes or sp for dynamic font sizes in Android. E.g.:
android:textSize="26sp"
or
android:textSize="26dp"
User preferences will affect the first one. The second one not.
A good overview
回答2:
To understand how the font sizes work in iOS, take a look at the WWDC 2017 : Building Apps with Dynamic Type video whose content is perfectly summarized here.
The first two sections (Text styles and Custom fonts) should provide you important information about the connection between accessibility and the font sizes.
Everything is well explained to get a full understanding of how the text styles, the font sizes and the custom fonts must be used to have the expected response in iOS accessibility.
来源：https://stackoverflow.com/questions/34712864/how-accessibility-affect-font-sizes-in-ios-and-android