NSDictionary：比较NSDictionaries

Question

有两个文件。我们称它们为fileOne和fileTwo

每个都有几个具有相同名称的NSMutableDictionary属性。下面列出几条：

@property (retain, nonatomic) NSMutableDictionary * lunchStartTimeObject; 
@property (retain, nonatomic) NSMutableDictionary * lunchLocationNameObject; 
@property (retain, nonatomic) NSMutableDictionary * lunchLocationAddressObject; 
@property (retain, nonatomic) NSMutableDictionary * activity1NameObject; 
@property (retain, nonatomic) NSMutableDictionary * activity1StartTimeObject; 
@property (retain, nonatomic) NSMutableDictionary * activity1LocationNameObject; 
@property (retain, nonatomic) NSMutableDictionary * activity1CommentsFieldObject; 
@property (retain, nonatomic) NSMutableDictionary * activity1LocationAddressObject; 
@property (retain, nonatomic) NSMutableDictionary * activity2NameObject; 
@property (retain, nonatomic) NSMutableDictionary * activity2StartTimeObject; 
@property (retain, nonatomic) NSMutableDictionary * activity2LocationNameObject; 
@property (retain, nonatomic) NSMutableDictionary * activity2CommentsFieldObject; 
@property (retain, nonatomic) NSMutableDictionary * activity2LocationAddressObject; 

我想通过调用下面的方法（或类似的东西）与两个文件同名的字典比较：

-(NSMutableDictionary *)cellColorForChanges:(NSMutableDictionary *)newdictionary :(NSMutableDictionary *)oldDictionary; 
{ 
    if(![newdictionary isEqualToDictionary:oldDictionary]) 
    { 
     [newdictionary setValue:@"UIColor yellowColor" forKey:@"cellColor"]; 
    } 
    return newdictionary; 
} 

我试图避免手动为每个NSMutableDictionary编写代码。有没有办法避免以下：

if(![fileOne.lunchStartTimeObject isEqualToDictionary:fileTwo.lunchStartTimeObject]) 
{ 
    fileOne.lunchStartTimeObject setValue:@"UIColor yellowColor" forKey:@"cellColor"]; 
} 

我有麻烦找出最有效的方式来完成上述。是否有可能发送每个字典到一个方法和取回字典（更新与另一个关键，如果它不相等）？或者我想避免的是不可避免的？

Answer 1

由于您没有充分抽象出对象，因此遇到此问题。在我看来，你上面的财产清单是荒谬的多余的。即使你提供的简单代码很难阅读。

试着以更概念的方式思考你的问题。尝试考虑可能封装您正在寻找的功能的对象。

看你的属性，你可能想这样

@interface Activity : NSObject 

@property (nonatomic, strong) NSString *name; 
@property (nonatomic, strong) NSDate *startTime; 
@property (nonatomic, strong) Location *location; 

-(BOOL)isEqualToActivity:(Activity*)activity; 

@end 

类也许你需要存储有关位置的详细信息的位置类;也许你可以使用更多的字段，如firstName，lastName;也许你需要一个type（枚举或字符串）属性，告诉它是什么样的活动等 - 你明白了。

如图所示，你可以写你自己的比较方法，你可以调整，以允许更多或更少的严格的资本或小写字母，数字格式等