Masonry 比例设置multipliedBy与dividedBy区别

multipliedBy是相对于自身比例（只能用于自身的比）dividedBy是相对于其他视图的比例（也可以用于自身的比），multipliedBy是相当于算数中的“除以”，dividedBy相当于算数中的“除”，看以下具体操作：

先查看效果图：

image

• multipliedBy相对于自身的比

UIView *view1 = [[UIView alloc] init];
       view1.backgroundColor = [UIColor redColor];
       [self.view addSubview:view1];
    [view1 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.mas_offset(100);
        make.top.mas_equalTo(self.view.mas_top).mas_offset(100);
        make.width.mas_equalTo(view1.mas_height).multipliedBy(0.3);
        make.centerX.mas_equalTo(self.view.mas_centerX);
    }];

• dividedBy相对于其他视图的比例

UIView *view2 = [[UIView alloc] init];
    view2.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:view2];
    [view2 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(view1.mas_bottom).mas_offset(100);
        make.centerX.mas_equalTo(self.view.mas_centerX);
        make.width.mas_equalTo(view1.mas_width);
        make.height.mas_equalTo(view1.mas_height).dividedBy(2);
        
    }];

• dividedBy绿色线距self.view的1/5处，lineV.left除self.view.mas_right=5,相当于把self.view.withd划分五份

 UIView *lineV = [[UIView alloc] init];
    lineV.backgroundColor = [UIColor greenColor];
    [self.view addSubview:lineV];
    
    [lineV mas_makeConstraints:^(MASConstraintMaker *make) {
        make.height.mas_equalTo(self.view.mas_height);
        make.top.mas_equalTo(self.view.mas_top);
        make.width.mas_offset(1);
        make.left.mas_equalTo(self.view.mas_right).dividedBy(5);
        
    }];

• multipliedBy红色线处于self.view的中间位置，linev2.left除以self.view.mas_right = 0.5

UIView *linev2 = [[UIView alloc] init];
    linev2.backgroundColor = [UIColor redColor];
    [self.view addSubview:linev2];
    
    [linev2 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(self.view.mas_top);
        make.height.mas_equalTo(self.view.mas_height);
        make.width.mas_offset(1);
        make.left.mas_equalTo(self.view.mas_right).multipliedBy(0.5);
    }];

• dividedBy用于自身视图的比

UIView *lineV3 = [[UIView alloc] init];
    lineV3.backgroundColor = [UIColor greenColor];
    [self.view addSubview:lineV3];
    
    [lineV3 mas_makeConstraints:^(MASConstraintMaker *make) {
       make.top.mas_equalTo(self.view.mas_top);
       make.width.mas_offset(100);
        make.centerX.mas_equalTo(self.view.mas_centerX);
       make.height.mas_equalTo(lineV3.mas_width).dividedBy(2);

    }];