Question

我正在尝试使用transitionFromView

        [UIView transitionFromView:fromView
                            toView:weakSelf.logoFlipTurnPhoneAnimationImageView
                          duration:0.6
                           options:UIViewAnimationOptionTransitionFlipFromBottom
                        completion:^(BOOL finished)
         {}

它适用于ios7但在转换后的ios8中，视图框可能会受到约束的移动（在superview中看不见的区域）。

我在

之前和之后打印了约束数组

之前：

"<NSLayoutConstraint:0x78f0cc60 V:[UIImageView:0x78f0c070(113)]>",
"<NSLayoutConstraint:0x78f0cc90 H:[UIImageView:0x78f0c070(113)]>"

后

"<NSLayoutConstraint:0x78f0cc60 V:[UIImageView:0x78f0c070(113)]>",
"<NSLayoutConstraint:0x78f0cc90 H:[UIImageView:0x78f0c070(113)]>",
"<NSContentSizeLayoutConstraint:0x79216d00 H:[UIImageView:0x78f0c070(113)] Hug:250 CompressionResistance:750>",
"<NSContentSizeLayoutConstraint:0x7b86aaf0 V:[UIImageView:0x78f0c070(113)] Hug:250 CompressionResistance:750>"

知道为什么要添加两个约束，以及为什么会导致问题？

Answer 1

在storyboard或xib中选择视图，然后选择要设置约束的视图。然后重置为建议的约束

transitionFromView无法正常运行ios8

1 个答案: