iOS / iPhone / iPad

-[GANCustomVariableBuffer retain]: message sent to deallocated instance

This error occurs with Google Analytics for iOS - GANTracker.

The error occurs when setting a custom variable after deploying a TrackEvent method. The solution is to set the custom variable first and then issue a track event method. The reason is because the variable gets transmitted along with the track event. If you set the custom variable up first, then track event

So:
call setCustomVariableAtIndex
then trackEvent

And not in the other order.

How to simply iterate through a NSDictionary

for (NSString* key in yourDictionary) {
id value = [yourDictionary objectForKey:key];
}

Validation failed: The data couldn’t be read because it has been corrupted -- Localizable.strings

How to fix the Xcode build error: Validation failed: The data couldn’t be read because it has been corrupted -- Localizable.strings

CALayer position contains NaN

Check that the frame of the offending object is initialized and valid. Sometimes you'll see a uninitialized value or a value is in completely invalid for a CGFloat.