masonry源码心得(如何让类可以在 MAC 中和 iOS 中使用)

最新推荐文章于 2022-06-02 20:00:00 发布

Li.CQ

最新推荐文章于 2022-06-02 20:00:00 发布

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文章标签： masonry

本文链接：https://blog.youkuaiyun.com/qq_27074387/article/details/88810090

// - 因为在 iOS 中是 UIVIew 在 MAC中是 NSView 为了在两个平台可以兼容

// - 声明和定义
#if TARGET_OS_IPHONE || TARGET_OS_TV

    #import <UIKit/UIKit.h>
    #define MAS_VIEW UIView
    #define MAS_VIEW_CONTROLLER UIViewController
    #define MASEdgeInsets UIEdgeInsets

    typedef UILayoutPriority MASLayoutPriority;
    static const MASLayoutPriority MASLayoutPriorityRequired = UILayoutPriorityRequired;
    static const MASLayoutPriority MASLayoutPriorityDefaultHigh = UILayoutPriorityDefaultHigh;
    static const MASLayoutPriority MASLayoutPriorityDefaultMedium = 500;
    static const MASLayoutPriority MASLayoutPriorityDefaultLow = UILayoutPriorityDefaultLow;
    static const MASLayoutPriority MASLayoutPriorityFittingSizeLevel = UILayoutPriorityFittingSizeLevel;

#elif TARGET_OS_MAC

    #import <AppKit/AppKit.h>
    #define MAS_VIEW NSView
    #define MASEdgeInsets NSEdgeInsets

    typedef NSLayoutPriority MASLayoutPriority;
    static const MASLayoutPriority MASLayoutPriorityRequired = NSLayoutPriorityRequired;
    static const MASLayoutPriority MASLayoutPriorityDefaultHigh = NSLayoutPriorityDefaultHigh;
    static const MASLayoutPriority MASLayoutPriorityDragThatCanResizeWindow = NSLayoutPriorityDragThatCanResizeWindow;
    static const MASLayoutPriority MASLayoutPriorityDefaultMedium = 501;
    static const MASLayoutPriority MASLayoutPriorityWindowSizeStayPut = NSLayoutPriorityWindowSizeStayPut;
    static const MASLayoutPriority MASLayoutPriorityDragThatCannotResizeWindow = NSLayoutPriorityDragThatCannotResizeWindow;
    static const MASLayoutPriority MASLayoutPriorityDefaultLow = NSLayoutPriorityDefaultLow;
    static const MASLayoutPriority MASLayoutPriorityFittingSizeCompression = NSLayoutPriorityFittingSizeCompression;

#endif

// - 使用
@interface MAS_VIEW (MASAdditions)

@end

本文中的宏定义的使用的精髓在于

#define MAS_VIEW NSView 和 #define MAS_VIEW UIView 在不同的操作系统中 MAS_VIEW 代表不同的 NSView 或者 UIView 而使用时候就直接 @interface MAS_VIEW (MASAdditions) 和 - (id)initWithView:(MAS_VIEW *)view; 和 @property (nonatomic, weak) MAS_VIEW *view; 这样使用起来非常方便这样的方式值得学习很有灵性