• NSLayoutAttribute 属性参数解释


    typedef NS_ENUM(NSInteger, NSLayoutRelation) {
        NSLayoutRelationLessThanOrEqual = -1,          //小于等于
        NSLayoutRelationEqual = 0,                     //等于
        NSLayoutRelationGreaterThanOrEqual = 1,        //大于等于
    };
    typedef NS_ENUM(NSInteger, NSLayoutAttribute) {
        NSLayoutAttributeLeft = 1,                     //左侧
        NSLayoutAttributeRight,                        //右侧
        NSLayoutAttributeTop,                          //上方
        NSLayoutAttributeBottom,                       //下方
        NSLayoutAttributeLeading,                      //首部
        NSLayoutAttributeTrailing,                     //尾部
        NSLayoutAttributeWidth,                        //宽度
        NSLayoutAttributeHeight,                       //高度
        NSLayoutAttributeCenterX,                      //X轴中心
        NSLayoutAttributeCenterY,                      //Y轴中心
        NSLayoutAttributeBaseline,                     //文本底标线
                                                                                                                                                        
        NSLayoutAttributeNotAnAttribute = 0            //没有属性
    };
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  • 原文地址:https://www.cnblogs.com/woaixixi/p/4607002.html
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