-(IBAction)startFade:(id)sender {
[_label setAlpha:0.0f];
//fade in
[UIView animateWithDuration:2.0f animations:^{
[_label setAlpha:1.0f];
} completion:^(BOOL finished) {
//fade out [UIView animateWithDuration:2.0f animations:^{
[_label setAlpha:0.0f];
} completion:nil];
}];
}
http://stackoverflow.com/questions/20891614/fade-in-fade-out-animation
