讓兩個物件間建立weak關係

讓兩個物件間建立weak關係

這是為了給兩個物件間建立weak關係，當乙個物件被釋放時，另外乙個物件再獲取這個值時就是nil，也就是不持有這個物件:)

原始碼：weakrelateddictionary.h 與 weakrelateddictionary.m

//

//testdemo
////
created by youxianming on 14-9-25.
////
#import
@inte***ce
weakrelateddictionary : nsobject
+ (void)addobject:(id)object forkey:(id
)key;
+ (id)objectforkey:(id
)key;
@end

//

//testdemo
////
created by youxianming on 14-9-25.
////
#import
"weakrelateddictionary.h
"static nsmaptable *weakdictionary =nil;
@implementation
weakrelateddictionary
+ (void
)initialize
}+ (void)addobject:(id)object forkey:(id
)key
if ([weakdictionary objectforkey:key] ==nil)
}+ (id)objectforkey:(id
)key
@end

//

//nsobject+weakrelated.h
//scrollviewshowimage
////
created by youxianming on 14-9-24.
////
#import
@inte***ce
nsobject (weakrelated)
//與物件弱相關聯絡
- (void)setrelatedobject:(id)object;//
取出建立關係的物件
- (id
)relatedobject;
@end

//

//nsobject+weakrelated.m
//scrollviewshowimage
////
created by youxianming on 14-9-24.
////
#import
"nsobject+weakrelated.h
"#import
"weakrelateddictionary.h
"@implementation
nsobject (weakrelated)
- (void)setrelatedobject:(id)object
- (id
)relatedobject
@end

model.h 與 model.m

//

//objectrelated
////
created by youxianming on 14-9-27.
////
#import
@inte***ce
model : nsobject
@end

//

//objectrelated
////
created by youxianming on 14-9-27.
////
#import
"model.h
"@implementation
model
@end

//

//objectrelated
////
created by youxianming on 14-9-27.
////
#import
"viewcontroller.h
"#import
"nsobject+weakrelated.h
"#import
"weakrelateddictionary.h
"#import
"model.h
"@inte***ce
viewcontroller ()
@property (nonatomic, strong) model *model;
@end
@implementation
viewcontroller
- (void
)viewdidload 
- (void
)showinfo
@end

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