问题
I have an app that uses a service to get some icons.
With this service I can get any image of any size, so I've planned to get the 3 images (@1x, @2x and @3x) and store them on the BBDD, and then get the scale to use one of these three; or maybe get only the one according with the device scale.
But the thing is, how can I get the device scale (@1x, @2x and @3x) programmatically?
Both Obj-c and Swift are welcomed ;)
回答1:
Use
[UIScreen mainScreen].scale;
this will give you the exact scale as per device.
In Swift 3
UIScreen.main.scale
Cheers.
来源：https://stackoverflow.com/questions/30572426/get-device-image-scale-e-g-1x-2x-and-3x