casatwy / handyautolayout Goto Github PK

code

[self.view addConstraints:[self.view1 constraintsSize:CGSizeMake(50, 30)]];
[self.view addConstraints:[self.view1 constraintsTopInContainer:10.0f]];
[self.view addConstraints:[self.view1 constraintsTopInContainer:20.0f]];

console

2016-09-02 19:53:50.192 FaiChouTest[3223:179657] 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. 
(
    "<NSLayoutConstraint:0x7faad0d452c0 UIView:0x7faad306b8f0.top == UIView:0x7faad3017670.top + 10>",
    "<NSLayoutConstraint:0x7faad0d2daf0 UIView:0x7faad306b8f0.top == UIView:0x7faad3017670.top + 20>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7faad0d2daf0 UIView:0x7faad306b8f0.top == UIView:0x7faad3017670.top + 20>

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.

这样会使得添加动画变得困难，我们需要手动移除原先的constraint，再添加之。
我们可以在原封装方法里添加判断。

大哥啊，你一言不合就改方法调用，这样对我们使用这影响很大啊，height 改成了ct_height，大哥能不能不要这么任性

以下这些方法从名称上不能准确的知道其作用，要写代码验证。

- (void)fromTheTop:(CGFloat)distance ofView:(UIView *)view;

- (void)fromTheRelativeTop:(CGFloat)distance ofView:(UIView *)view screenType:(UIScreenType)screenType;

- (void)relativeTopInContainer:(CGFloat)top shouldResize:(BOOL)shouldResize screenType:(UIScreenType)screenType;

should be this:

• (void)leftInContainer:(CGFloat)left shouldResize:(BOOL)shouldResize
  {
  if (shouldResize) {
  self.width = self.x - left + self.width;
  }
  self.x = left;
  }

pod search HandyAutoLayout

显示并没有这个库，请问目前只能通过podfile 指定git地址的方式使用么？

[self addConstraints:[all constraintsLeft:15.0 FromView:self]];
[self addConstraint:[all constraintWidth:62]];
[self addConstraint:[all constraintHeight:30]];
[self addConstraint:[all constraintCenterYEqualToView:self]];
[self addConstraint:[good constraintWidthEqualToView:all]];
[self addConstraint:[good constraintHeightEqualToView:all]];
[self addConstraint:[good constraintCenterYEqualToView:self]];
[self addConstraints:[good constraintsLeft:15+margin FromView:self]];
[self addConstraint:[normol constraintHeightEqualToView:all]];
[self addConstraint:[normol constraintWidthEqualToView:all]];
[self addConstraint: [normol constraintCenterYEqualToView:self]];
[self addConstraints: [normol constraintsLeft:15+2_margin FromView:self]];
[self addConstraint: [bad constraintWidthEqualToView:all]];
[self addConstraint: [bad constraintHeightEqualToView:all]];
[self addConstraint: [bad constraintCenterYEqualToView:self]];
[self addConstraints: [bad constraintsRight:15.0 FromView:self]];
[self addConstraints: [bad constraintsLeft:15+3_margin FromView:self]];

有些还是很好懂，但是有些必须自己去写一遍才能确定