如何从具有键特定值的字典数组中提取字典？

Question

我有以下数组：

myArrey = (
    object1:{key1:valueA, key2:valueB},
    object2:{key1:valueC, key2:valueD}
)

我需要做些什么才能找到一个对象，即key1的值是keyC？

MyObject obj = [myArrey abrakadabra with: key1 and:valueC];
NSLog(@"obj - %@",obj);

obj = object2

Answer 1

使用indexOfObjectPassingTest:

NSInteger indexOfMatchingDictionary = [myArray indexOfObjectPassingTest:^BOOL(NSDictionary *obj, NSUInteger idx, BOOL *stop) {
        return [[obj valueForKey:@"key1"] isEqual:@"valueC"];
}
NSDictionary *matchingDictionary = [myArray objectAtIndex:indexOfMatchingDictionary];