iOS模拟器iOS版本

Question

Is there a way to detect what iOS simulator you are running. ie The difference between running 5.1 vs. 6.1.

Using [[UIDevice currentDevice] systemVersion] return x86 so i can't determine the difference between the 6.1 simulator and the 7.0 simulator.

Answer 1

You should take a look at the Availability

The relevant declarations are all in

Availability.h AvailabilityInternal.h

#if __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_6_0
  // Here we go with iOS 6++
#else
  // This is the old way
#endif

Answer 2

[[UIDevice currentDevice] systemVersion] should give you the information you need. However, that is not something that should be used for logic. It is designed to be a user-presentable string.

If you want to make logic decisions, you should do it based on capabilities. For example, check for the existence of potentially-weak symbols at runtime before using them rather than making decisions based on the system version.

Answer 3

That's easy!

Swift version:

if #available(iOS 11.0, *) {
} else {
}

Objective-C version:

if (@available(iOS 11.0, *)) {
} else {
}