CODEWITHSUNDEEP
iosobjective-cuiviewcontrollercore-animation
user3770280
user3770280

Reputation: 193

Core Animation not working when not root View Controller

I have some Core Animation code that works perfectly on a root View Controller (VC1), but when I change the root to another View Controller (VC2) that segues to VC1, the animations on VC1 never runs, even though its animation methods are called. Interestingly, if I turn off animate on the segue, the core animation on VC1 works.

This is my implementation of VC1:

CAShapeLayer* circleLayer;

- (void)setupCircle
{
    CGPathRef circlePath = CGPathCreateWithEllipseInRect(CGRectMake(10, 40, 100, 100), nil);
    circleLayer = [CAShapeLayer layer];
    circleLayer.path = circlePath;
    circleLayer.fillColor = [UIColor orangeColor].CGColor;
    circleLayer.strokeColor = [UIColor blueColor].CGColor;
    circleLayer.lineWidth = 10;
    [self.view.layer addSublayer:circleLayer];
}

- (void)animateCircle
{
    CABasicAnimation* circleAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
    circleAnimation.duration = 4;
    circleAnimation.fromValue = @0;
    circleAnimation.toValue = @1;
    [circleLayer addAnimation:circleAnimation forKey:@"circleAnimation"];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setupCircle];
    [self animateCircle];
}

What is the problem? Thanks.

Upvotes: 1

Views: 474

Answers (2)

Amir iDev
Amir iDev

Reputation: 1257

You can try this code;

[self performSelector:@"setupCircle" withObject:nil afterDelay:0.1];
[self performSelector:@"animateCircle" withObject:nil afterDelay:0.1];

Upvotes: 0

Kumar KL
Kumar KL

Reputation: 15335

but when I change the root to another View Controller (VC2) that segues to VC1

The problem in your cycle is viewDidLoad, it doesn't get called if you back from the Child VC.

Put the stuff in the viewWillAppear OR viewDidAppear

Upvotes: 1

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