UIButton flashing animation
animation, ios, uikit
Solution
Perhaps not the best way, and doesn't really allow you to stop the flashing... but this is simple, works, and does not hinder user interaction:
- (void)viewDidLoad
{
[self flashOn:myButton];
}
- (void)flashOff:(UIView *)v
{
[UIView animateWithDuration:.05 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^ {
v.alpha = .01; //don't animate alpha to 0, otherwise you won't be able to interact with it
} completion:^(BOOL finished) {
[self flashOn:v];
}];
}
- (void)flashOn:(UIView *)v
{
[UIView animateWithDuration:.05 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^ {
v.alpha = 1;
} completion:^(BOOL finished) {
[self flashOff:v];
}];
}
Problem
I was wondering if it was possible to apply a flashing animation to a UIButton. I have searched but only found the code for a pulse animation which changes the size of my UIButton continuously. I instead was thinking about some kind of flashing animation to alert the user he has to press the button. The only approach to the problem I can think of is by changing the alpha constantly using: ``` [self setAlpha:0.5]; ``` ...but it won't be as visible as a flashing button.