1.首先在分類文件中導入頭文件?

　　#import?<objc/runtime.h>

2.實現(xiàn)代碼如下:

(1).h定義文件

#import <UIKit/UIKit.h>@interface UIView (Category)/** 基本數(shù)據(jù)類型*/ @property (nonatomic,assign) CGFloat offset;/** 對象類型*/ @property (nonatomic,copy) NSString *name;/** 結構體(CGPoint)*/ @property (nonatomic,assign) CGPoint point;@end

?

(2).m實現(xiàn)文件

#import "UIView+Category.h" #import <objc/runtime.h>static NSString *offsetKey = @"offset"; static NSString *nameKey = @"name"; static NSString *pointKey = @"pointKey";@implementation UIView (Category)/** 添加基本數(shù)據(jù)類型需要轉化為NSNumber類型*/- (void)setOffset:(CGFloat)offset {objc_setAssociatedObject(self, &offsetKey, @(offset), OBJC_ASSOCIATION_ASSIGN); }- (CGFloat)offset {NSNumber *numberValue = objc_getAssociatedObject(self, &offsetKey);return [numberValue intValue];}/** 對象類型*/ - (void)setName:(NSString *)name {objc_setAssociatedObject(self, &nameKey, name, OBJC_ASSOCIATION_COPY_NONATOMIC); }- (NSString *)name {return objc_getAssociatedObject(self, &nameKey); }/** 添加結構體屬性* 需要包裝成NSValue*/ - (void)setPoint:(CGPoint)point {NSValue *value = [NSValue value:&point withObjCType:@encode(CGPoint)];objc_setAssociatedObject(self,&pointKey, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);}- (CGPoint)point {NSValue *value = objc_getAssociatedObject(self, &pointKey);if(value) {CGPoint point;[value getValue:&point];return point;}else {return CGPointZero;}}@end

　　

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轉載于:https://www.cnblogs.com/HZChenCheng/p/6892806.html

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