SnapKit：

https://github.com/SnapKit/SnapKit

v.snp_makeConstraints{ (make)in

由于swift和oc语法不一样 equalTo(self.view)是传入参数

make.top.equalTo(self.view).offset(100)

make.left.equalTo(self.view).offset(100)

make.right.equalTo(self.view).offset(-100)

make.bottom.equalTo(self.view).offset(-100)

}

Masonry：

https://github.com/SnapKit/Masonry

由于swift和oc语法不一样 equalTo()是先调用get方法

v.mas_makeConstraints{ (make)in

make.top.equalTo()(self.view).setOffset(100)

make.left.equalTo()(self.view).setOffset(100)

make.right.equalTo()(self.view).setOffset(100)

make.bottom.equalTo()(self.view).setOffset(100)

}