CODEWITHSUNDEEP
iosobjective-cios8xcode6cgaffinetransform
Maheswaran Ravisankar
Maheswaran Ravisankar

Reputation: 17920

CGAffineTransformIdentity different with iOS8 and XCode6 (Without Autolayout)

I have an animation to add a subview to make it appear as if it comes from inside where the user touches and then fills the entire screen.

Sameway, when an iOS app opens up from the place the user touches it..

- (void) showView : (UIView *) theview : (CGPoint) thepoint {
    CGPoint c = thepoint;
    CGFloat tx = c.x - floorf(theview.center.x) + 10;
    CGFloat ty = c.y - floorf(theview.center.y) + 100;

    [UIView animateWithDuration:0.5
                          delay:0.0
                        options:UIViewAnimationOptionCurveEaseOut
                     animations:^{
                         // Transforms
                         CGAffineTransform t = CGAffineTransformMakeTranslation(tx, ty);
                         t = CGAffineTransformScale(t, 0.1, 0.1);
                         theview.transform = t;
                         theview.layer.masksToBounds = YES;
                         [theview setTransform:CGAffineTransformIdentity];

                     }
                     completion:^(BOOL finished) {
                     }];
}

The above code did, what we needed till iOS8.. Built under XCode5.1 (iOS7 SDK)

But the behaviour was entirely different starting with the iOS8 SDK, XCode6

The ZOOM now is behaving strangely. I was finally able to find that CGAffineTransformIdentity is behaving wrongly(or I use it wrongly?) in iOS8..

I see many have this issue, but they mentioned about AutoLayout. All my views are created programatically. We don't use a nib file.(IB)

How can I make this work with XCode 6?

Upvotes: 2

Views: 1339

Answers (1)

Maheswaran Ravisankar
Maheswaran Ravisankar

Reputation: 17920

After couple of hours effort, I came up with a solution. I just post it for future users.

- (void) showView : (UIView *) theview : (CGPoint) thepoint {

    CGPoint c = thepoint;
    CGFloat tx = c.x - (floorf(theview.center.x)) ;
    CGFloat ty = c.y - (floorf(theview.center.y));

    /* The transformation now  is before the animation block */
    CGAffineTransform t = CGAffineTransformMakeTranslation(tx, ty);
    t = CGAffineTransformScale(t, 0.1, 0.1);
    theview.transform = t;
    theview.layer.masksToBounds = YES;

    /* Animate only the CGAffineTransformIdentity */
    [UIView animateWithDuration:0.8
                          delay:0.0
                        options:UIViewAnimationOptionCurveEaseIn
                     animations:^{
                                    theview.layer.masksToBounds = YES;
                                    [theview setTransform:CGAffineTransformIdentity];
                                  }
                     completion:^(BOOL finished) {
                          }];
}

But I have no clue, why it worked with iOS7 SDK previously and not with the new iOS8 SDK.!

Upvotes: 2

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