我有一个 UITableView，在 UIBuilder 中定义了一个标题。我遇到了与我的约束冲突的自动调整掩码错误，所以我开始四处寻找，直到找到原因。
不幸的是，修复似乎是导致崩溃的原因。当我以编程方式关闭 setTranslatesResizingMasks 时，不会发生冲突的布局错误（因为它已修复，或者因为它永远没有机会），而是我遇到了崩溃：
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews. UITableView's implementation of -layoutSubviews needs to call super.'
我尝试了其他一些线程（比如这个）关于使用方法调配来“修补” UITableViewCell 的建议（我继续做 UITableVIew，而我正在使用它），但它没有帮助。
编辑：
这是一些可以实现的示例代码。因为我需要能够在运行时改变视图，所以它必须通过代码创建，而不是故事板。
请注意，如果我在自己的视图中添加表头，一切正常；当我尝试将其作为表格的标题视图嵌入时，事情就开始爆炸了。我要么关闭 tableHeader 视图的 translateAutoresizingMaskIntoConstraints 以避免冲突，要么在使用自动布局时遇到冲突（它破坏的约束导致我的一些控件神秘地消失）。
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.