我有一个UITableView，在UIBuilder中定义了一个头部。我发现自动调整大小掩码与我的约束冲突导致错误，所以开始找原因。
不幸的是，修复看起来是原因的问题导致了崩溃。当我以编程方式关闭setTranslatesResizingMasks时，冲突的布局错误就不会发生（可能是因为已经修复了，也可能是因为它从未有机会出现），而是导致崩溃：
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews. UITableView's implementation of -layoutSubviews needs to call super.'
我尝试了一些其他线程的建议（如这个），使用方法交换来“修补”UITableViewCell（我也进行了UITableVIew），但没有帮助。
编辑：
下面是一些示例代码，可以解决问题。因为我需要在运行时修改视图，所以必须通过代码创建它，而不是故事板。
请注意，如果我将表头作为自己的视图添加进去，一切都可以正常工作；但当我尝试将其嵌入表格的标题视图时，问题就开始出现了。我要么关闭tableHeader视图的translateAutoresizingMaskIntoConstraints以避免冲突，要么由于我的自动布局使用造成的约束破坏导致某些控件神秘消失。
self.palletTagField=[[UITextField alloc] init];
[self.palletTagField setTranslatesAutoresizingMaskIntoConstraints:NO];
[self.palletTagField setDelegate:self];
[self.palletTagField setBorderStyle:UITextBorderStyleRoundedRect];
UIButton *addButton=[UIButton buttonWithType:UIButtonTypeContactAdd];
[addButton addTarget:self
action:@selector(addPalletTagButtonPressed)
forControlEvents:UIControlEventTouchUpInside];
[addButton setTranslatesAutoresizingMaskIntoConstraints:NO];
UIView *tableHeader=[[UIView alloc] init];
[tableHeader setTranslatesAutoresizingMaskIntoConstraints:NO];//Problem line
[tableHeader addSubview:self.palletTagField];
[tableHeader addSubview:addButton];
[tableHeader addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-[field]-[button]-|"
options:NSLayoutFormatAlignAllCenterY
metrics:nil
views:@{@"field":self.palletTagField,
@"button":addButton}]];
[tableHeader addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[field]-|"
options:kNilOptions
metrics:nil
views:@{@"field": self.palletTagField}]];
UITableView *palletTable=[[UITableView alloc] init];
[palletTable registerClass:[UITableViewCell class] forCellReuseIdentifier:@"palletTagCell"];
[palletTable setEditing:YES];
self.palletTagTable=palletTable;
palletTable.tableHeaderView=tableHeader;
[palletTable setTranslatesAutoresizingMaskIntoConstraints:NO];
[palletTable setDataSource:self];
[palletTable setDelegate:self];
[self.contentView addSubview:palletTable];
[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[pallets]-|"
options:kNilOptions
metrics:nil
views:@{@"pallets":palletTable}]];
[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[last]-[pallets(>=400)]"
options:kNilOptions
metrics:nil
views:@{@"last": lastObject,
@"pallets":palletTable}]];
调试器的示例输出：
[ANONYMIZED][31422:70b] 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:0x8f77810 H:|-(NSSpace(20))-[UITextField:0x8f6ad70] (Names: '|':UIView:0x8f77650 )>",
"<NSLayoutConstraint:0x8f77860 H:[UITextField:0x8f6ad70]-(NSSpace(8))-[UIButton:0x8f77500]>",
"<NSLayoutConstraint:0x8f778d0 H:[UIButton:0x8f77500]-(NSSpace(20))-| (Names: '|':UIView:0x8f77650 )>",
"<NSAutoresizingMaskLayoutConstraint:0x8fad160 h=--& v=--& H:[UIView:0x8f77650(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x8f77860 H:[UITextField:0x8f6ad70]-(NSSpace(8))-[UIButton:0x8f77500]>
Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
[ANONYMIZED][31422:70b] 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:0x8f77940 V:|-(NSSpace(20))-[UITextField:0x8f6ad70] (Names: '|':UIView:0x8f77650 )>",
"<NSLayoutConstraint:0x8f77980 V:[UITextField:0x8f6ad70]-(NSSpace(20))-| (Names: '|':UIView:0x8f77650 )>",
"<NSAutoresizingMaskLayoutConstraint:0x8fad1c0 h=--& v=--& V:[UIView:0x8f77650(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x8f77980 V:[UITextField:0x8f6ad70]-(NSSpace(20))-| (Names: '|':UIView:0x8f77650 )>
Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.