使用NSPredicate过滤包含字典的数组 [英] Filter Array with dictionaries using NSPredicate

问题描述

有一个数组，每个元素都是 NSDictionary 。

There is an Array with each element being a NSDictionary.

NSMutableArray *mutArr = [NSMutableArray array];

for (Person *person in persons) {
    NSDictionary *dict = [[NSDictionary alloc] initWithObjectsAndKeys:person.name, @"name", person.email, @"email", nil];
    [mutArr addObject:dict];
}

self.arr = [[NSArray alloc] initWithArray:mutArr];

如何使用姓名或者提交 arr 电子邮件包含字符串 @过滤字符串使用 filterArrayUsingPredicate：方法。

How to filer the arr with name or email contains string @"filter string" by using filterArrayUsingPredicate: method.

提前致谢！

推荐答案

请参阅以下示例：

 NSArray *array = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"filter string" forKey:@"email"]];   // you can also do same for Name key... 
    NSArray *filteredarray = [array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(email == %@)", @"filter string"]];

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