第三方布局框架Neon初探

github地址：https://github.com/mamaral/Neon

居中

设置 view 在 superview 的中心，调用 anchorInCenter()并设置view大小,相当于frame center

 view1.anchorInCenter(width: 300, height: 300)
 imgV.anchorInCenter(width: 150, height: 150)

# 填充
如果想 view 填充superview，设置距离superview的边框距离, 调用 fillSuperview()
```
imgV.fillSuperview()
imgV.fillSuperview(left: 20, right: 5, top: 30, bottom: 5)
```

# 角对齐
view 相对于 superview 固定于某个角，调用anchorInCorner(),并传入要对齐哪个角的参数
```
view1.anchorInCorner(.topLeft, xPad: 20, yPad: 100, width: 100, height: 100)
view2.anchorInCorner(.topRight, xPad: 20, yPad: 50, width: 100, height: 100)
view3.anchorInCorner(.bottomLeft, xPad: 20, yPad: 20, width: 100, height: 100)
view4.anchorInCorner(.bottomRight, xPad: 20, yPad: 30, width: 100, height: 100)
```

# 边对齐
如果想让 view 相对于 superview 的某一边依靠对齐，调用anchorToEdge,自动居中对齐
```
view1.anchorToEdge(.top, padding: 300, width: 100, height: 100)
view2.anchorToEdge(.left, padding: 0, width: 100, height: 100)
view3.anchorToEdge(.bottom, padding: 88, width: 100, height: 100)
view4.anchorToEdge(.right, padding: 0, width: 100, height: 100)
```

# 边填充
如果想让 view 相对于 superview 的某一边居中对齐并自动填拉伸充，调用anchorAndFillEdge()
```
view1.anchorAndFillEdge(.top, xPad: size + 5, yPad: 88, otherSize: size)
view2.anchorAndFillEdge(.bottom, xPad: size + 5, yPad: 83, otherSize: size)
view3.anchorAndFillEdge(.left, xPad: 0, yPad: 0, otherSize: size)
view4.anchorAndFillEdge(.right, xPad: 0, yPad: 0, otherSize: size)
```

# 相对对齐
##### 距离相对view右边 居 上-中-下
```
view1.anchorInCenter(width: 200, height: 200)
view2.align(.toTheRightMatchingTop, relativeTo: view1, padding: 5, width: 50, height: 50)
view3.align(.toTheRightMatchingBottom, relativeTo: view1, padding: 5, width: 50, height: 50)
view4.align(.toTheRightCentered, relativeTo: view1, padding: 5, width: 50, height: 50)
```

##### 距离相对view左边 居 上 中 下
```
view2.align(.toTheLeftMatchingTop, relativeTo: view1, padding: 5, width: 50, height: 50)
view3.align(.toTheLeftMatchingBottom, relativeTo: view1, padding: 5, width: 50, height: 50)
view4.align(.toTheLeftCentered, relativeTo: view1, padding: 5, width: 50, height: 50)
```

##### 距离相对view下边 居 上 中 下
```
view2.align(.underMatchingLeft, relativeTo: view1, padding: 5, width: 50, height: 50)
view3.align(.underMatchingRight, relativeTo: view1, padding: 5, width: 50, height: 50)
view4.align(.underCentered, relativeTo: view1, padding: 5, width: 50, height: 50)
```

##### 距离相对view上边 居 上 中 下
```
view2.align(.aboveMatchingLeft, relativeTo: view1, padding: 5, width: 50, height: 50)
view3.align(.aboveMatchingRight, relativeTo: view1, padding: 5, width: 50, height: 50)
view4.align(.aboveCentered, relativeTo: view1, padding: 5, width: 50, height: 50)
```

# 对齐并填充
不知道或者没法指定一个相对视图的大小，但又要兼顾填充和对齐，并且还依赖与相邻的 view。调用alignAndFill()、alignAndFillWidth()、alignAndFillHeight()
```
view1.anchorInCenter(width: 200, height: 200)
view2.alignAndFillWidth(align: .toTheRightMatchingTop, relativeTo: view1, padding: 5, height: 30)
view3.alignAndFillHeight(align: .aboveCentered, relativeTo: view1, padding: 50, width: 60)
view4.alignAndFill(align: .toTheLeftMatchingTop, relativeTo: view1, padding: 5)
```

# 挤压对齐
如果两个 view 夹着中间一个 view 的需求，调用alignBetweenHorizontal()和alignBetweenVertical()

view1.anchorInCenter(width: 150, height: 300)
view2.align(.toTheRightMatchingTop, relativeTo: view1, padding: 5, width: 100, height: 100)
view3.align(.toTheRightMatchingBottom, relativeTo: view1, padding: 5, width: 100, height: 100)
view4.align(.toTheRightCentered, relativeTo: view1, padding: 5, width: 100, height: 100)
view4.alignBetweenVertical(align: .aboveMatchingRight, primaryView: view3, secondaryView: view2, padding: 10, width: 50)

# 组合
多个view一起组合布局,调用groupInCenter()、groupInCorner()、groupAgainstEdge()

##### 居中对齐组合
```
view.groupInCenter(group: .vertical, views: [view1,view2,view3], padding: 10, width: size, height: size)
view.groupInCenter(group: .horizontal, views: [view1,view2,view3], padding: 20, width: size, height: size)
```

##### 角对齐组合 相对于superview某一个角组合排布
```
view.groupInCorner(group: .horizontal, views: [view1, view2, view3], inCorner: .bottomLeft, padding: 10, width: size, height: size)
view.groupInCorner(group: .vertical, views: [view1, view2, view3], inCorner: .bottomRight, padding: 10, width: size, height: size)

![屏幕快照 2019-03-19 上午11.28.49.png](https://upload-images.jianshu.io/upload_images/7787328-02cdb30aa15e04c9.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br/>
#####  边对齐组合,相对于superview某一条边的中点排布

view.groupAgainstEdge(group: .horizontal, views: [view1, view2, view3], againstEdge: .left, padding: 10, width: size, height: size)

view.groupAgainstEdge(group: .vertical, views: [view1, view2, view3], againstEdge: .bottom, padding: 10, width: size, height: size)

![Simulator Screen Shot - iPhone XS Max - 2019-03-19 at 11.34.19.png](https://upload-images.jianshu.io/upload_images/7787328-c60dde25111f0881.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

![0FC4A788F2D326B5CFD19EDB76E96ADE.jpg](https://upload-images.jianshu.io/upload_images/7787328-596241b81f97af1f.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)