Runtime 自動化歸檔

Runtime的使用

 1 (id)initWithCoder:(NSCoder *)decoder 
 2 { 
 3 　　if (self = [super init]) {
 4 　　unsigned int count = 0;
 5 　　Ivar *ivars = class_copyIvarList([self class], &count);
 6 
 7 　　for (int i = 0; i<count; i++) {
 8     　　
 9    　　 Ivar ivar = ivars[i];
10 
11     　　// 獲取成員變量
12     　　const char *name = ivar_getName(ivar);
13 
14     　　// 歸檔
15     　　NSString *key = [NSString stringWithUTF8String:name];
16     　　id value = [decoder decodeObjectForKey:key];
17 
18     　　// 設置
19     　　[self setValue:value forKey:key];
20 　　}
21 
22 　　free(ivars);
23 　　} 
24 　　return self; 
25 }

 

 

 1 - (void)encodeWithCoder:(NSCoder *)encoder
 2 {
 3 
 4     unsigned int count = 0;
 5     Ivar *ivars = class_copyIvarList([self class], &count);
 6 
 7     for (int i = 0; i<count; i++) {
 8        
 9         Ivar ivar = ivars[i];
10 
11         //獲取成員變量
12         const char *name = ivar_getName(ivar);
13 
14         // 歸檔
15         NSString *key = [NSString stringWithUTF8String:name];
16         id value = [self valueForKey:key];
17         [encoder encodeObject:value forKey:key];
18     }
19 
20     free(ivars);
21 }