Get device image scale (e.g. @1x, @2x and @3x)
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 ;) iphonic 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