首先创建一个 Model 类
#import <Foundation/Foundation.h>
@interface Model : NSObject
@end
添加 Category
头文件
#import "Model.h"
@interface Model (Data)
@property (nonatomic,copy) NSString *data;
@end
m文件
#import "Model+Data.h"
#import <objc/runtime.h>
NSString *const kData = @"data";
@implementation Model (Data)
- (NSString *)data{
return objc_getAssociatedObject(self, (__bridge const void *)(kData));
}
- (void)setData:(NSString *)data{
objc_setAssociatedObject(self, (__bridge const void *)(kData), data, OBJC_ASSOCIATION_COPY);
}
测试
#import <XCTest/XCTest.h>
#import "Model.h"
#import "Model+Data.h"
@interface TestRunTimerTests : XCTestCase
{
Model *model ;
}
@end
@implementation TestRunTimerTests
- (void)setUp {
[super setUp];
model = [Model new];
}
- (void)testCartygor1{
model.data = @"ddddd";
NSLog(@"%@",model.data);
NSAssert([model.data isEqualToString:@"ddddd"], @"fail--------");
}
- (void)testCartygor2 {
NSLog(@"---- - =%@= ---",model.data);
NSAssert(true, @"fail--------");
}
