如何编写谓词来过滤字典数组？

Question

我有字典数组，字典包含键作为NSString，值作为整数。我尝试了以下代码但没有得到结果。

NSPredicate *objPredicate = [NSPredicate predicateWithFormat:@"%@ = %@", key, [NSNumber numberWithInt:value]];

NSArray  *filteredArray = [array filteredArrayUsingPredicate:objPredicate];

Answer 1

使用此：

NSPredicate *objPredicate = [NSPredicate predicateWithFormat:@"self[%@] = %@", key, @(value)];

NSArray  *filteredArray = [array filteredArrayUsingPredicate:objPredicate];