来自不同类的NSMutableArray获取Null(NSMutableArray from different class gets Null)

来自不同类的NSMutableArray获取Null(NSMutableArray from different class gets Null)

我上过这堂课：

@interface PersonModel : NSObject @property (nonatomic, weak) NSString *string; @property (nonatomic, weak) NSMutableArray *array; @end

在另一个类中，我使用该字符串和数组。 字符串很好，但数组变为null。 我像往常一样启动它，像这样：

person.array = [[NSMutableArray alloc] init]; [person.array addObject:[object copy]]; NSLog(@"Array: %@", person.array);

I've this class:

@interface PersonModel : NSObject @property (nonatomic, weak) NSString *string; @property (nonatomic, weak) NSMutableArray *array; @end

and in another class, I use that string and array. The string goes fine, but the array getting null. I initiate it as usual, like this:

person.array = [[NSMutableArray alloc] init]; [person.array addObject:[object copy]]; NSLog(@"Array: %@", person.array);

最满意答案

如果其他内容具有对同一属性的强引用，则弱属性引用很有用。 在你的情况下，似乎并非如此。 使您的Array成为一个strong属性。

（为了便于阅读，不要以大写字母开头命名变量; array稍微好于Array 。有意义的东西会更好。）

A weak property reference is useful if something else has a strong reference to the same property. In your case it doesn't seem like that's the case. Make your Array into a strong property.

(For ease of reading, don't name your variables starting with capital letters; array is slightly better than Array. Something meaningful would be better still.)