UIAlertView/UIAlertController iOS 7 and iOS 8 compatibility
The detection pattern is identical to the Objective-C style.
You need to detect whether the current active runtime has the ability to instantiate this class
if objc_getClass("UIAlertController") != nil { println("UIAlertController can be instantiated") //make and use a UIAlertController } else { println("UIAlertController can NOT be instantiated") //make and use a UIAlertView}
Don't try and work out this based on the OS version. You need to detect abilities NOT OS.
EDIT
The original detector for this answer NSClassFromString("UIAlertController")
fails under -O
optimisation so its been changed to the current version which does work for Release builds
EDIT 2
NSClassFromString
is working at all optimisations in Xcode 6.3/Swift 1.2
For non-swift code, pure objective-C do this
if ([UIAlertController class]) { // use UIAlertController UIAlertController *alert= [UIAlertController alertControllerWithTitle:@"Enter Folder Name" message:@"Keep it short and sweet" preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action){ //Do Some action here UITextField *textField = alert.textFields[0]; NSLog(@"text was %@", textField.text); }]; UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { NSLog(@"cancel btn"); [alert dismissViewControllerAnimated:YES completion:nil]; }]; [alert addAction:ok]; [alert addAction:cancel]; [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) { textField.placeholder = @"folder name"; textField.keyboardType = UIKeyboardTypeDefault; }]; [self presentViewController:alert animated:YES completion:nil]; } else { // use UIAlertView UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Folder Name" message:@"Keep it short and sweet" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil]; dialog.alertViewStyle = UIAlertViewStylePlainTextInput; dialog.tag = 400; [dialog show]; }
I was annoyed that I kept having to write out both situations, so I wrote a compatible UIAlertController that works for iOS 7 as well so I just threw it up on GitHub. I did my best to replicate the (much better) methods of adding buttons and actions of the UIAlertController. Works with both Objective-C and Swift. I'm posting this as I found this question when searching on Google and figured it could be helpful for others.