UIAlertView is crashing app on iOS 7

Question

I have just released my app on the App Store however I have just been emailed and told that there is issues with crashing.

The issue is with Alert Views which crash

Answer 1

Here is my drag and drop swift solution:

//Alerts change in iOS8, this method is to cover iOS7 devices
func CozAlert(title: String, message: String, action: String, sender: UIViewController){

    if respondsToSelector("UIAlertController"){
        var alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
        alert.addAction(UIAlertAction(title: action, style: UIAlertActionStyle.Default, handler:nil))
        sender.presentViewController(alert, animated: true, completion: nil)
    }
    else {
        var alert = UIAlertView(title: title, message: message, delegate: sender, cancelButtonTitle:action)
        alert.show()
    }
}

Call like this:

CozAlert("reportTitle", message: "reportText", action: "reportButton", sender: self)

Beware this is only for the most basic alerts, you might need additional code for advanced stuff.

Answer 2

I had the same problem in the relese build. It seems an internal bug of the swift compiler (using Xcode 6.0.1 (6A317) )

I solved actually with a objC helper class with this method:

+ (BOOL) checkIfClassExists:(NSString *)className {
    id c = objc_getClass([className cStringUsingEncoding:NSASCIIStringEncoding]);
    if (c != nil) {
        return YES;
    } else {
        return NO;
    }
}

called in my swift code with a bridge header

if ObjCFix.checkIfClassExists("UIAlertController") {
    //iOS 8 code here
} else {
    //iOS 7 code here
}