UIAlertController if iOS 8, otherwise UIAlertView

Question

I want to conform to the UIAlertController used in iOS 8 since UIAlertView is now deprecated. Is there a way that I can use this without breaking support for iOS 7? Is there

Answer 1

Method one

by ios system version check

#define iOSVersionLessThan(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
// below ios8 ,create UIAlertView
if(iOSVersionLessThan(@"7.0")){
     // todo

// ios8 and above ,UIActionController avaliable
}else{
    // todo
}

Method two

by system feature detect

// create UIActionController 
if([UIActionController class]){
    // todo
// create UIAlertView
}else{
    // todo
}

But,there's a third lib named PSTAlertController that deal with backwards compatible to iOS 7 of UIActionSheet and UIAlertView.

ref to

• Supporting Multiple Versions of iOS
• Supporting iOS 6
• Supporting Multiple iOS Versions and Devices