我在我的故事板中编写了一个简单的自定义UICollectionViewCell,我也以编程方式完成了相同的结果.
它有一个单独的UIImageView和两个UILabel,如下所示：
<--UIIMAGEVIEW--> <--UILABEL-------->
|-(10px)- | | -(10px)- -(10px)-|
<---------------> <--UILABEL-------->
图像位于左侧,然后右侧是两个上下标签.
每个间隔有10个像素间隙,并且全部以单元Y轴为中心.然后标签有一个常数来偏离中心(向上和向下).
图像的高度和宽度固定为44px,标签的固定高度为20px(宽度灵活).
约束按预期工作,永远不会破坏应用程序,但它们总是在下面吐出这个恼人的控制台日志信息,因为它们显然正在破坏.
如果我将此行添加到我的UICollectionViewCell子类中,则约束不再中断并吐出控制台错误,但它们在屏幕上完全被破坏.
[self.contentView setTranslatesAutoresizingMaskIntoConstraints:NO];
有什么线索吗？这看起来很不合逻辑！
2014-10-25 18:28:14.273 Air Plan[1579:580797] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand,refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x17009edc0 H:[UIImageView:0x1701f7d00(44)]>","<NSLayoutConstraint:0x17009f130 H:|-(10)-[UIImageView:0x1701f7d00] (Names: '|':UIView:0x170183810 )>","<NSLayoutConstraint:0x17009f270 H:[UIImageView:0x1701f7d00]-(10)-[UILabel:0x155e59970'detailLbl']>","<NSLayoutConstraint:0x17009f310 H:[UILabel:0x155e59970'detailLbl']-(10)-| (Names: '|':UIView:0x170183810 )>","<NSAutoresizingMaskLayoutConstraint:0x17409eff0 h=--& v=--& H:[UIView:0x170183810(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x17009edc0 H:[UIImageView:0x1701f7d00(44)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2014-10-25 18:28:14.276 Air Plan[1579:580797] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand,refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x17009fcc0 H:[UIImageView:0x1701fa800(44)]>","<NSLayoutConstraint:0x17009ff40 H:|-(10)-[UIImageView:0x1701fa800] (Names: '|':UIView:0x170180a90 )>","<NSLayoutConstraint:0x1702800a0 H:[UIImageView:0x1701fa800]-(10)-[UILabel:0x155e5b440'detailLbl']>","<NSLayoutConstraint:0x170280140 H:[UILabel:0x155e5b440'detailLbl']-(10)-| (Names: '|':UIView:0x170180a90 )>","<NSAutoresizingMaskLayoutConstraint:0x17409ea00 h=--& v=--& H:[UIView:0x170180a90(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x17009fcc0 H:[UIImageView:0x1701fa800(44)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2014-10-25 18:28:14.278 Air Plan[1579:580797] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand,refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x170280a00 H:[UIImageView:0x1701fab00(44)]>","<NSLayoutConstraint:0x170280c80 H:|-(10)-[UIImageView:0x1701fab00] (Names: '|':UIView:0x1701822f0 )>","<NSLayoutConstraint:0x170280dc0 H:[UIImageView:0x1701fab00]-(10)-[UILabel:0x155e5cd10'detailLbl']>","<NSLayoutConstraint:0x170280e60 H:[UILabel:0x155e5cd10'detailLbl']-(10)-| (Names: '|':UIView:0x1701822f0 )>","<NSAutoresizingMaskLayoutConstraint:0x17409f180 h=--& v=--& H:[UIView:0x1701822f0(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x170280a00 H:[UIImageView:0x1701fab00(44)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2014-10-25 18:28:14.280 Air Plan[1579:580797] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand,refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x170281090 H:[UIImageView:0x1701fae00(44)]>","<NSLayoutConstraint:0x170281310 H:|-(10)-[UIImageView:0x1701fae00] (Names: '|':UIView:0x170182220 )>","<NSLayoutConstraint:0x1702813b0 H:[UIImageView:0x1701fae00]-(10)-[UILabel:0x155e5d620'titleLbl']>","<NSLayoutConstraint:0x170281400 H:[UILabel:0x155e5d620'titleLbl']-(10)-| (Names: '|':UIView:0x170182220 )>","<NSAutoresizingMaskLayoutConstraint:0x17409fd60 h=--& v=--& H:[UIView:0x170182220(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x170281090 H:[UIImageView:0x1701fae00(44)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2014-10-25 18:28:14.282 Air Plan[1579:580797] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand,refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x170281b80 H:[UIImageView:0x1701fb100(44)]>","<NSLayoutConstraint:0x17409f4a0 H:|-(10)-[UIImageView:0x1701fb100] (Names: '|':UIView:0x170182150 )>","<NSLayoutConstraint:0x17409f5e0 H:[UIImageView:0x1701fb100]-(10)-[UILabel:0x155d64210'detailLbl']>","<NSLayoutConstraint:0x17409f680 H:[UILabel:0x155d64210'detailLbl']-(10)-| (Names: '|':UIView:0x170182150 )>","<NSAutoresizingMaskLayoutConstraint:0x1742800f0 h=--& v=--& H:[UIView:0x170182150(50)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x170281b80 H:[UIImageView:0x1701fb100(44)]>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
解决方法
我也遇到了这个问题并通过在UICollectionViewCell子类中添加它来修复它：
SWIFT 3
override func awakeFromNib() {
contentView.autoresizingMask = [UIViewAutoresizing.flexibleWidth,UIViewAutoresizing.flexibleHeight]
}
OBJC
- (void)awakeFromNib{
self.contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
Xcode 6.1 iOS 8.0.2,8.1
