自动版式CGAffineTransform iOS7 iOS8上 [英] AutoLayout CGAffineTransform iOS7 iOS8
问题描述
有关小时我一直在试图找出为什么自动布局是打破我的iOS8上的约束,但不是在iOS7当我申请CGAffineTransformMakeScale。 (我使用的是X code 6.0.1(6A317)与故事板和自动布局)。
For hours I've been trying to figure why autolayout is breaking my constraint in iOS8 but not in iOS7 when I apply CGAffineTransformMakeScale. (I use Xcode 6.0.1 (6A317) with Storyboard and Autolayout).
在code:
TCTGridController *gridController = self.gridController;
stackController.view.frame = gridController.view.frame;
stackController.stackCollectionView.transform = CGAffineTransformMakeScale(0.1, 0.1);
[gridController.view.superview addSubview:stackController.view];
[UIView animateWithDuration:0.2 animations:^{
stackController.stackCollectionView.transform = CGAffineTransformMakeScale(1, 1);
[stackController.stackCollectionView layoutIfNeeded];
} completion:^(BOOL finished) {
[stackController didMoveToParentViewController:self];
}];
iOS7结果是:
iOS7 result :
iOS8上的结果是:
iOS8 result :
iOS8上的约束错误:
Constraint error on iOS8 :
(
"<NSLayoutConstraint:0x7fa126a9b100 V:[_UILayoutGuide:0x7fa126a9a900]-(120)-[TCTCollectionView:0x7fa125139400]>",
"<_UILayoutSupportConstraint:0x7fa126a8b500 V:[_UILayoutGuide:0x7fa126a9a900(0)]>",
"<_UILayoutSupportConstraint:0x7fa126a8a960 V:|-(0)-[_UILayoutGuide:0x7fa126a9a900] (Names: '|':UIView:0x7fa126a9a810 )>",
"<NSAutoresizingMaskLayoutConstraint:0x7fa126c86840 h=--- v=--- 'UIView-Encapsulated-Layout-Top' V:[UIView:0x7fa126a9a810]-(0)-|>"
)
任何想法?
奥洛克
推荐答案
CGAffineTransformIdentity行为不同的ios7和iOS8上。这与自动布局和大小班做。解决的办法是去除约束,与上ios7动画冲突
CGAffineTransformIdentity behaves differently on ios7 and ios8. This has to do with auto-layout and size classes. The solution is to remove constraints that conflict with the animation on ios7.
// solve the constraint-animation problem
if(NSFoundationVersionNumber <= NSFoundationVersionNumber_iOS_7_1) {
// iOS7 remove constraints that conflict with animation
if (self.centerYAlignment != nil) {
self.view.removeConstraint(self.centerYAlignment) //is an IBOutlet
}
} else {
// iOS8 constraint animations are fine
}
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