水平平分子視圖

    UIButton *v1 = [self createButton:@"v1" backgroundColor:[UIColor redColor]];
    v1.myHeight = 60;
    v1.myLeading = 10;
    v1.myTop = 20;
    
    UIButton *v2 = [self createButton:@"v2" backgroundColor:[UIColor redColor]];
    v2.myHeight = 60;
    v2.leadingPos.equalTo(v1.trailingPos).offset(10);
    v2.myTop = 20;
    
    UIButton *v3 = [self createButton:@"v3" backgroundColor:[UIColor redColor]];
    v3.myHeight = 60;
    v3.leadingPos.equalTo(v2.trailingPos).offset(10);
    v3.myTop = 20;

    //v1,v2,v3平分父視圖的寬度。因?yàn)槊總€(gè)子視圖之間都有10的間距，因此平分時(shí)要減去這個(gè)間距值。這里的寬度通過設(shè)置等于數(shù)組來完成均分。
    v1.widthSize.equalTo(@[v2.widthSize.add(-40/3),v3.widthSize.add(-40/3)]).add(-40/3);
    
    [self.rootLayout addSubview:v1];
    [self.rootLayout addSubview:v2];
    [self.rootLayout addSubview:v3];

WX20180813-153548@2x.png

水平居中

    UIButton *v1 = [self createButton:@"v1" backgroundColor:[UIColor redColor]];
    v1.myHeight = 60;
    v1.myWidth = 80;
    v1.myTop = 20;
    
    UIButton *v2 = [self createButton:@"v2" backgroundColor:[UIColor redColor]];
    v2.myHeight = 60;
    v2.myWidth = 80;
    v2.myTop = 20;
    
    UIButton *v3 = [self createButton:@"v3" backgroundColor:[UIColor redColor]];
    v3.myHeight = 60;
    v3.myWidth = 80;
    v3.myTop = 20;

    //通過為centerXPos等于一個(gè)數(shù)組值，表示v1和v2在父布局視圖之內(nèi)整體水平居中,這里的10表示v1和v2之間還有10的間隔。
    v1.centerXPos.equalTo(@[v2.centerXPos.offset(10),v3.centerXPos.offset(10)]);
    
    [self.rootLayout addSubview:v1];
    [self.rootLayout addSubview:v2];
    [self.rootLayout addSubview:v3];

WX20180813-154036@2x.png