NSArray充满了NSDictionaries。如何找到对象的索引？ [英] NSArray full of NSDictionaries. How to find index of object?

问题描述

我有一个数组，里面装满了 NSDictionaries 。我想找到一个字典的索引，但我对这个字典的了解只是值键 @name。
我该怎么办？

I have an array which is filled with NSDictionaries. I want to find the index of one of the dictionary, but what I know about this dictionary is only a value for key @"name". How do I do it ?

推荐答案

在 theArray 中查找第一个字典的索引，其值为 @name是 theValue ：

Find index of first dictionary in theArray whose value for @"name" is theValue:

NSUInteger index = [theArray indexOfObjectPassingTest:
        ^BOOL(NSDictionary *dict, NSUInteger idx, BOOL *stop)
        {
            return [[dict objectForKey:@"name"] isEqual:theValue];
        }
];

index 将 NSNotFound 如果找不到匹配的对象。

index will be NSNotFound if no matching object is found.

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