tableHeaderView 在使用frame布局完成后使用mansory 来相对布局操作界面时就会出现
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
2018-12-29 16:52:18.563718+0800 TuiTui[22592:4888976] [LayoutConstraints] 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.
(
"<MASLayoutConstraint:0x281ff3120 UIButton:0x102f06ab0.left == UIView:0x102f068d0.left + 30>",
"<MASLayoutConstraint:0x281ff33c0 UIButton:0x102f06ab0.right == UIView:0x102f068d0.right - 30>",
"<NSLayoutConstraint:0x2818b70c0 UIView:0x102f068d0.width == 0>"
)
Will attempt to recover by breaking constraint
<MASLayoutConstraint:0x281ff33c0 UIButton:0x102f06ab0.right == UIView:0x102f068d0.right - 30>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
2018-12-29 16:52:19.391112+0800 TuiTui[22592:4888976] [NetworkInfo] Could not successfully update network info for descriptor <CTServiceDescriptor 0x283baca80, domain=1, instance=2> during initialization.
错误的
self.tabV.tableHeaderView = self.headV;
_submitBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[_submitBtn setTitle:@"xxx" forState:UIControlStateNormal];
[_submitBtn setTitle:@"xx" forState:UIControlStateSelected];
[_footV addSubview:_submitBtn];
WS_ViewRadius(_submitBtn,23.4);
[_submitBtn makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self.footV).offset(30);
make.right.equalTo(self.footV).offset(-30);
make.height.equalTo(47);
make.centerY.equalTo(self.footV);
}];
正确的
self.tabV.tableHeaderView = self.headV;
[self.headV setNeedsLayout];
[self.headV layoutIfNeeded];
_submitBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[_submitBtn setTitle:@"xxx" forState:UIControlStateNormal];
[_submitBtn setTitle:@"xx" forState:UIControlStateSelected];
[_footV addSubview:_submitBtn];
WS_ViewRadius(_submitBtn,23.4);
[_submitBtn makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self.footV).offset(30);
make.right.equalTo(self.footV).offset(-30);
make.height.equalTo(47);
make.centerY.equalTo(self.footV);
}];
如果还有一个tableFooterView 要添加
错误的如下：
self.tabV.tableHeaderView = self.headV;
[self.headV setNeedsLayout];
[self.headV layoutIfNeeded];
[self addTopView];//添加headV的子视图依赖headV的left或right
self.tabV.tableFooterView = self.footV;
[self.footV setNeedsLayout];
[self.footV layoutIfNeeded];
[self addFootView];//添加footV的子视图依赖footV的left或right
正确的
self.tabV.tableHeaderView = self.headV;
self.tabV.tableFooterView = self.footV;
[self.tabV setNeedsLayout];
[self.tabV layoutIfNeeded];
[self addTopView];
[self addFootView];
原因是：
1、tabV设置tableHeaderView是不会去重新刷新一下相对布局，需要手动强制刷新。
2、第二种刷新完tableHeaderView，再去刷新tableFooterView就会失效，需要手动强制刷新tableView.
