How to make a blinking (or flashing) cursor on iphone?

Question

I\'m trying to create a custom \"blinking cursor\" in UIKit, I\'ve tried as shown below, having 2 functions that basically keep calling each other until the cursor is hidden

Answer 1

CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
animation.keyPath = @"opacity";
animation.values =  @[ @(0.0),@(0.0),@(1.0), @(1.0)];
animation.keyTimes = @[ @(0.001),@(0.49),@(0.50), @(1.0)];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.duration = 1.2;
animation.autoreverses = NO;
animation.repeatCount= HUGE;
[layer addAnimation:animation forKey:@"blink"];