oc 的画面布局

画面布局：SDAutoLayout、Masonry 

Masonry :

简单例子：

  self.viewTwo= [[UIViewalloc]init];

    self.viewTwo.backgroundColor = UIColor.blueColor;

    [self.viewTwo addSubview:self.viewTwo];

    [self.viewTwo mas_makeConstraints:^(MASConstraintMaker *make){

        make.top.equalTo(self.viewOne).offset(20);

        make.left.equalTo(self.view).offset(20);

        make.right.equalTo(self.view).offset(20);

        make.height.equalTo(self.view).offset(70);

    }];

SDAutoLayout :  

简单例子：

    self.viewFour= [[UIView alloc] Init];

    self.viewFour.backgroundColor = UIColor.blackColor;

    [self.viewFour addSubview:self.viewFour];

        self.viewFour.sd_layout.leftEqualToView(self.viewThree).rightEqualToView(self.viewThree).topSpaceToView(self.viewThree, 30).heightIs(50);

Masonry 的详细使用 

转载链接：https://zhuanlan.zhihu.com/p/396529672

SDAutoLayout 的详细使用

转载链接：https://blog.csdn.net/wsyx768/article/details/82052811