這兩個約束如何衝突？

我有問題追查一些衝突的約束。該AutoresizingMask已添加了我，我試圖瞭解什麼添加其他約束是怎麼回事：這兩個約束如何衝突？

2015-09-26 22:27:14.959 Darkenss[26537:8462681] 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:0x7fc461fe9110 UICollectionView:0x7fc463090000.top == UIView:0x7fc461fc6620.topMargin + 302>", 
    "<NSAutoresizingMaskLayoutConstraint:0x7fc461d3f820 h=--- v=--- 'UIView-Encapsulated-Layout-Top' V:[UIView:0x7fc461fc6620]-(0)-|>" 
) 

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7fc461fe9110 UICollectionView:0x7fc463090000.top == UIView:0x7fc461fc6620.topMargin + 302>

我看不出這兩個制約因素是如何在實際衝突。

視圖層次是：

<UIView: 0x7fc461fc6620; frame = (0 0; 375 667); autoresize = W+H; layer = <CALayer: 0x7fc461fc48a0>> 
    | <UIImageView: 0x7fc461fd4f50; frame = (0 0; 600 600); clipsToBounds = YES; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461fc7ea0>> 
    | <UILabel: 0x7fc461fcba20; frame = (28 68; 300 48); text = 'Darkness AP'; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x7fc461fcb910>> 
    | <Darkenss.UIDescreteSliderWithCircles: 0x7fc461e477c0; frame = (28 124; 544 30); clipsToBounds = YES; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461c2df00>; layer = <CALayer: 0x7fc461fb09b0>> 
    | <UIButton: 0x7fc461e8c8e0; frame = (28 162; 93 128); opaque = NO; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461c2c770>; layer = <CALayer: 0x7fc461e99bb0>> 
    | | <UIImageView: 0x7fc461d2ad70; frame = (0 6.5; 93 115); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d2af10>> 
    | <UIButton: 0x7fc461e1ee60; frame = (129 162; 92 128); opaque = NO; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461c2ccd0>; layer = <CALayer: 0x7fc461e1beb0>> 
    | | <UIImageView: 0x7fc461d38d50; frame = (0 6.5; 92 115); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d38ef0>> 
    | <UIButton: 0x7fc461e20c10; frame = (229 162; 93 128); opaque = NO; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461c2d1f0>; layer = <CALayer: 0x7fc461e372b0>> 
    | | <UIImageView: 0x7fc461d23ab0; frame = (0 6.5; 93 115); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d23c50>> 
    | <UIButton: 0x7fc461e04d20; frame = (330 162; 92 128); opaque = NO; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461c2d400>; layer = <CALayer: 0x7fc461e225a0>> 
    | | <UIImageView: 0x7fc461d2a9a0; frame = (0 6.5; 92 115); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d43d80>> 
    | <UIButton: 0x7fc461e31e20; frame = (430 162; 81 128); opaque = NO; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461e99d00>; layer = <CALayer: 0x7fc461e31cd0>> 
    | | <UIImageView: 0x7fc461d2c750; frame = (0 6.5; 81 115); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d1e660>> 
    | <UIButton: 0x7fc461e374f0; frame = (16 97.5; 145.5 128); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x7fc461e34cb0>> 
    | | <UIImageView: 0x7fc461d20da0; frame = (0 0; 145.5 128); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d47ed0>> 
    | | <UIImageView: 0x7fc461e55d50; frame = (0 0; 0 0); clipsToBounds = YES; hidden = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461e3d850>> 
    | | <UIButtonLabel: 0x7fc461d20f40; frame = (0 55.5; 27.5 17.5); text = 'Run 
Darkness 
Cycle'; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x7fc461d212f0>> 
    | <UIButton: 0x7fc461e2d510; frame = (169.5 97.5; 181.5 128); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x7fc461e60e10>> 
    | | <UIImageView: 0x7fc461d51e50; frame = (0 0; 181.5 128); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d431f0>> 
    | | <UIImageView: 0x7fc461d3c3c0; frame = (0 0; 0 0); clipsToBounds = YES; hidden = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d3c560>> 
    | | <UIButtonLabel: 0x7fc461d5c0e0; frame = (26.5 55.5; 128.5 17.5); text = ' Continue Combo '; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x7fc461d52250>> 
    | <UIImageView: 0x7fc461fcda20; frame = (4 302; 592 294); clipsToBounds = YES; hidden = YES; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461fcd030>> 
    | <UICollectionView: 0x7fc463090000; frame = (4 310; 367 353); clipsToBounds = YES; opaque = NO; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x7fc461e45640>; layer = <CALayer: 0x7fc461e3b3a0>; contentOffset: {0, 0}; contentSize: {367, 54}> collection view layout: <UICollectionViewFlowLayout: 0x7fc461e468d0> 
    | | <Darkenss.AddTrackerViewCell: 0x7fc4640217f0; baseClass = UICollectionViewCell; frame = (0 0; 54 54); layer = <CALayer: 0x7fc464020fc0>> 
    | | | <UIButton: 0x7fc4640219c0; frame = (4 4; 46 46); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x7fc464020e70>> 
    | | | | <UIImageView: 0x7fc464024140; frame = (0 0; 46 46); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x7fc4640200b0>> 
    | | | <UIView: 0x7fc464022110; frame = (0 0; 54 54); autoresize = W+H; gestureRecognizers = <NSArray: 0x7fc4640228f0>; layer = <CALayer: 0x7fc464022270>> 
    | | <Darkenss.CounterArrayCellView: 0x7fc464032270; baseClass = UICollectionViewCell; frame = (54.5 0; 258 53); alpha = 0; layer = <CALayer: 0x7fc464032040>> 
    | | | <UIView: 0x7fc4640324d0; frame = (0 0; 258 53); gestureRecognizers = <NSArray: 0x7fc464032d10>; layer = <CALayer: 0x7fc464032630>> 
    | | | | <Darkenss.CounterArrayView: 0x7fc464032d40; frame = (0 0; 94 102); layer = <CALayer: 0x7fc464034b60>> 
    | | | | | <UILabel: 0x7fc464033190; frame = (6 6; 82 0); text = 'Treasure'; hidden = YES; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x7fc464033390>> 
    | | | | | | <_UILabelContentLayer: 0x7fc461d84ee0> (layer) 
    | | | | | <UICollectionView: 0x7fc46388e800; frame = (6 14; 82 82); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x7fc4640340a0>; layer = <CALayer: 0x7fc464033ba0>; contentOffset: {0, 0}; contentSize: {82, 81}> collection view layout: <Darkenss.CounterArrayLayout: 0x7fc464033960> 
    | | | | | | <Darkenss.DotView: 0x7fc461d7e190; baseClass = UICollectionViewCell; frame = (0 0; 40 40); hidden = YES; layer = <CALayer: 0x7fc461d7e530>> 
    | | | | | | | <UIView: 0x7fc461d7e550; frame = (0 0; 40 40); gestureRecognizers = <NSArray: 0x7fc461d7ed90>; layer = <CALayer: 0x7fc461d7e6b0>> 
    | | | | | | | | <UIImageView: 0x7fc461d7e370; frame = (0 0; 40 40); userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d7e510>> 
    | | | | | | <Darkenss.DotView: 0x7fc461d82250; baseClass = UICollectionViewCell; frame = (42 0; 40 40); hidden = YES; layer = <CALayer: 0x7fc461d821a0>> 
    | | | | | | | <UIView: 0x7fc461d825d0; frame = (0 0; 40 40); gestureRecognizers = <NSArray: 0x7fc461d82e10>; layer = <CALayer: 0x7fc461d82730>> 
    | | | | | | | | <UIImageView: 0x7fc461d82430; frame = (0 0; 40 40); userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d821c0>> 
    | | | | | | <Darkenss.DotView: 0x7fc461d86290; baseClass = UICollectionViewCell; frame = (0 41; 40 40); hidden = YES; layer = <CALayer: 0x7fc461d86610>> 
    | | | | | | | <UIView: 0x7fc461d86630; frame = (0 0; 40 40); gestureRecognizers = <NSArray: 0x7fc461d86e80>; layer = <CALayer: 0x7fc461d86790>> 
    | | | | | | | | <UIImageView: 0x7fc461d86470; frame = (0 0; 40 40); userInteractionEnabled = NO; layer = <CALayer: 0x7fc461d86240>> 
    | | | | | <UIImageView: 0x7fc464032fd0; frame = (0 0; 0 0); userInteractionEnabled = NO; layer = <CALayer: 0x7fc464033170>> 
    | | <Darkenss.SmallCounterTrackerViewCell: 0x7fc461c90870; baseClass = UICollectionViewCell; frame = (0 53; 108 56); clipsToBounds = YES; alpha = 0; opaque = NO; layer = <CALayer: 0x7fc461c8f970>> 
    | | | <UIView: 0x7fc461c90a70; frame = (0 0; 188 96); gestureRecognizers = <NSArray: 0x7fc461eb1710>; layer = <CALayer: 0x7fc461c8fb30>> 
    | | | | <UIImageView: 0x7fc461c90bd0; frame = (4 4; 88 88); opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461c8fad0>> 
    | | | | <Darkenss.OffsetLabels: 0x7fc461c90eb0; frame = (96 4; 88 88); autoresize = RM+BM; layer = <CALayer: 0x7fc461ca0570>> 
    | | | | | <UITextView: 0x7fc462050200; frame = (0 0; 7 14); text = '10'; clipsToBounds = YES; userInteractionEnabled = NO; gestureRecognizers = <NSArray: 0x7fc461c92170>; layer = <CALayer: 0x7fc461c91af0>; contentOffset: {0, 0}; contentSize: {7, 55}> 
    | | | | | | <<_UITextContainerView: 0x7fc461c92c00; frame = (0 0; 7 55); layer = <_UITextTiledLayer: 0x7fc461c92dd0>> minSize = {0, 0}, maxSize = {1.7976931348623157e+308, 1.7976931348623157e+308}, textContainer = <NSTextContainer: 0x7fc461c918f0 size = (7.000000,340282346638528859811704183484516925440.000000); widthTracksTextView = YES; heightTracksTextView = NO>; exclusionPaths = 0x7fc461c00dc0; lineBreakMode = 0> 
    | | | | | | | <UITextSelectionView: 0x7fc461c95070; frame = (0 0; 0 0); userInteractionEnabled = NO; layer = <CALayer: 0x7fc461c94fb0>> 
    | | | | | <UITextView: 0x7fc462052000; frame = (0 0; 9 14); text = '10'; clipsToBounds = YES; userInteractionEnabled = NO; gestureRecognizers = <NSArray: 0x7fc461c99480>; layer = <CALayer: 0x7fc461c98df0>; contentOffset: {0, 0}; contentSize: {9, 55}> 
    | | | | | | <<_UITextContainerView: 0x7fc461c9a270; frame = (0 0; 9 55); layer = <_UITextTiledLayer: 0x7fc461c9a440>> minSize = {0, 0}, maxSize = {1.7976931348623157e+308, 1.7976931348623157e+308}, textContainer = <NSTextContainer: 0x7fc461c98bd0 size = (9.000000,340282346638528859811704183484516925440.000000); widthTracksTextView = YES; heightTracksTextView = NO>; exclusionPaths = 0x7fc461c00dc0; lineBreakMode = 0> 
    | | | | | | | <UITextSelectionView: 0x7fc461c9c750; frame = (0 0; 0 0); userInteractionEnabled = NO; layer = <CALayer: 0x7fc461c9c690>> 
    | | | | | <CAShapeLayer: 0x7fc461d7d7a0> (layer) 
    | | <UIImageView: 0x7fc461e44520; frame = (361.5 284; 2.5 7); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461e3f7f0>> 
    | <UIImageView: 0x7fc461fd19f0; frame = (3 292; 286 21); autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461fd00c0>> 
    | <UIImageView: 0x7fc461fdbec0; frame = (289 292; 23 21); autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461fdb6e0>> 
    | <UIImageView: 0x7fc461fe1540; frame = (312 292; 285 21); autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x7fc461fd1b90>> 
    | <_UILayoutGuide: 0x7fc461fe6260; frame = (0 0; 0 0); hidden = YES; layer = <CALayer: 0x7fc461fe5f50>> 
    | <_UILayoutGuide: 0x7fc461fe6cb0; frame = (0 0; 0 0); hidden = YES; layer = <CALayer: 0x7fc461fe5aa0>>

更新：我失去了這個項目被住在硬盤驅動器（但我有一個備份，這只是45分鐘的時候，所以它都會制定出時我得到一個替代品......對嗎？我至少有希望）。不過，我有一個非常大的線索。

我正在計算KVO觀察者的約束和觸發佈局。這個觀察者在視圖有superview之前觸發了。在視圖具有超級視圖之前跳過更新可避免此問題。想多一點，並且：

'UIView-Encapsulated-Layout-Top'V：[UIView：0x7fc461fc6620] - （0） - |

讓我覺得 - （0） - 是「哦，視圖是零高度，感謝玩」因爲該視圖沒有超視圖和自動佈局只是不想處理這個混亂。

希望我可以在10月初恢復正常工作並找出什麼是硬件！

來源

2015-09-27 Stripes

你是用界面生成器還是編程？ –

接口生成器，至少是衝突的約束。 – Stripes

你問他們爲什麼會發生衝突或爲什麼會有一個自動調整大小約束？你對收集視圖有什麼其他約束？ – Wain

也許你已經忘記設置translatesAutoresizingMaskIntoConstraints = NO爲添加的程序要在其上使用約束一些看法。這可能解釋AutoresizingMask。好心檢查。

UPDATE：另外，這個約束：

<NSLayoutConstraint:0x7fc461fe9110 UICollectionView:0x7fc463090000.top == UIView:0x7fc461fc6620.topMargin + 302>

嘗試改變UIView:0x7fc461fc6620.topMargin到UIView:0x7fc461fc6620.top

我猜你還沒有佔到保證金在計算你的常數「302」

來源

2015-09-27 06:29:07

帶有translatesAutoresizingMaskIntoConstraints的唯一視圖仍然是「頂層」視圖0x7fc461fc6620。如果我把那一個關掉，我不太清楚如何把它放在它的超級視圖中。國際文憑組織不會讓我把它放在它的超級觀點當中。 – Stripes

這是爲什麼？它的超級觀點是什麼？ –

我認爲UIKit在運行時將超級視圖作爲_UIViewControllerWrapperView（非常未記錄）。 – Stripes

這兩個約束如何衝突？

回答

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