抽取UIView分类

很多时候我们在写控件的frame的时候都要写一长串分self.frame.size.width,为了简化操作,我们可以抽取一个UIView分类,以后每次写farme的时候只需要写self.lhl_width,下面是具体实现:

• 新建一个分类继承自UIView:

  
  

• UIView+Frame.h:此处定义属性名称的时候需要注意,为了防止和同事起重名的属性名,建议加上自己独有的前缀,以防重定义
  #import <UIKit/UIKit.h>

    @interface UIView (Frame)
  
    @property CGFloat lhl_width;
    @property CGFloat lhl_height;
    @property CGFloat lhl_x;
    @property CGFloat lhl_y;
  
    @end
  

• UIView+Frame.m:实现UIView+Frame.h中属性的setter和getter方法:

    #import "UIView+Frame.h"

    @implementation UIView (Frame)

    - (void)setLhl_width:(CGFloat)lhl_width
    {
        CGRect rect = self.frame;
        lhl_width = rect.size.width;
        self.frame = rect;
    }

    - (CGFloat)lhl_width
    {
        return self.frame.size.width;
    }

    - (void)setLhl_height:(CGFloat)lhl_height
    {
        CGRect rect = self.frame;
        lhl_height = rect.size.height;
        self.frame = rect;
    }

    - (CGFloat)lhl_height
    {
        return self.frame.size.height;
    }

    - (void)setLhl_x:(CGFloat)lhl_x
    {
        CGRect rect = self.frame;
        lhl_x = rect.origin.x;
        self.frame = rect;
    }

    - (CGFloat)lhl_x
    {
        return self.frame.origin.x;
    }

    - (void)setLhl_y:(CGFloat)lhl_y
    {
        CGRect rect = self.frame;
        lhl_y = rect.origin.y;
        self.frame = rect;
    }

    - (CGFloat)lhl_y
    {
        return self.frame.origin.y;
    }

    @end