How to change the rectangle shape to a circle shape with animation - ios

Question

I have a label:
self.logInLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 100)];
self.logInLabel.backgroundColor = [UIColor clearColor];
self.logInLabel.backgroundColor = Color_Circle_Outer;
self.logInLabel.textColor = Color_Circle_Outer;
self.logInLabel.textAlignment = NSTextAlignmentCenter;
self.logInLabel.lineBreakMode = NSLineBreakByWordWrapping;
self.logInLabel.numberOfLines = 1;
self.logInLabel.font = [UIFont boldSystemFontOfSize:12*IPAD];
self.logInLabel.text = #"Log In";
[self addSubview:self.logInLabel];
self.logInLabel.layer.cornerRadius = self.frame.size.height/2.0;
self.logInLabel.layer.borderColor = Color_Circle_Outer.CGColor;
self.logInLabel.layer.borderWidth = 2*IPAD;
self.logInLabel.layer.masksToBounds = YES;
I want to change this shape to a Circle. I have tried:
[UIView animateWithDuration:AnimationTime animations:^{
self.logInLabel.layer.bounds = CGRectMake(0, 0, self.frame.size.height, self.frame.size.height);
}];
But the shape changed immediately without animation, then the position change to center with animation. Then I tried with this:
[UIView animateWithDuration:AnimationTime animations:^{
self.logInLabel.bounds = CGRectMake(0, 0, self.logInLabel.frame.size.height, self.logInLabel.frame.size.height);
}];
I have very ugly animation effect.
I do not care if this view is a label, I just want to implement changing a rectangle shape to a circle shape with an animation.
Thank you.

Answer 1

It works only CABasicAnimation not the UIView animateWithDuration
UIView *logInLabel = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
logInLabel.backgroundColor = [UIColor blackColor];
logInLabel.layer.masksToBounds = YES;
[self.view addSubview:logInLabel];
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"cornerRadius"];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.fromValue = [NSNumber numberWithFloat:0.0f];
animation.toValue = [NSNumber numberWithFloat:100.0f];
animation.duration = 5.0;
[logInLabel.layer addAnimation:animation forKey:#"cornerRadius"];
[logInLabel.layer setCornerRadius:0.0];

Answer 2

From your code remove the line :
self.logInLabel.layer.cornerRadius = self.logInLabel.frame.size.height / 2.0;
and put it in an animation block like this
You can set cornerRadius of your UILabel to get a circular view.
[UIView animateWithDuration:AnimationTime animations:^{
self.logInLabel.layer.cornerRadius = self.logInLabel.frame.size.height / 2.0f;
}];
However, the animation will not look very good and the final frame will not be an exact circle because the height and width of your UILabel are not in 1:1 proportion.
If you still don't get the animation try to check the value of AnimationTime variable.

Answer 3

Look that might help you
[UIView animateWithDuration:0.4 animations:^{
CGPoint center = self.logInLabel.center;
self.logInLabel.layer.cornerRadius = self.logInLabel.frame.size.height/2;
self.logInLabel.frame = CGRectMake(0, 0, self.logInLabel.frame.size.height, self.logInLabel.frame.size.height);
self.logInLabel.center = center;
}];