NSPredicate匹配多个属性 [英] NSPredicate matching multiple properties

问题描述

我已经研究过过滤应用程序中的数据，并建议您查看NSPredicate.我一直在Apress的其中一本书中进行研究，但是在查找示例时遇到了问题，因此我试图创建一个示例.

I've looked into filtering my data in my app and I got a recommendation to look at NSPredicate. I've been looking into it in one of hte Apress books, but I'm having a problem finding an example so I'm trying to create one.

如果我有这样的事情:

myObject : NSObject
@property (nonatomic, retain) NSString *firstName;
@property (nonatomic, retain) NSString *lastName;
@property (nonatomic, assign) NSInteger age;

创建一些对象，然后将其放入数组中.

create some objects and put then into an array.

然后，我不确定如何创建要搜索的谓词

Then I'm not sure how I would create the prediate to search

推荐答案

就这么简单

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(firstName == %@) || (lastName == %@) || (age == %i)", <name>, <lastName>, <age>];

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