NSDictionary:查找特定对象并将其删除 [英] NSDictionary: Find a specific object and remove it

问题描述

我有 NSMutableDictionary 看起来像这样:

I have NSMutableDictionary that looks like this:

category =     (
            {
        description =             (
                            {
                id = 1;
                name = Apple;
            },
                            {
                id = 5;
                name = Pear;
            },
                            {
                id = 12;
                name = Orange;
            }
        );
        id = 2;
        name = Fruits;
    },
            {
        description =             (
                            {
                id = 4;
                name = Milk;
            },
                            {
                id = 7;
                name = Tea;
            }
        );
        id = 5;
        name = Drinks;
    }
);

现在，当用户在我的应用程序中执行操作时，我会得到对象的 @"name" 值，例如Apple".我想从字典中删除该对象，但是如何使用

Now, when a user performs an action in my application, I get the @"name"-value of the object, like "Apple". I would like to remove that object from the dictionary, but how will can I reach this object with the

[myDictionary removeObjectForKey:]

方法?

推荐答案

在高层次上，您需要获得对描述"数组的引用.然后遍历数组获取每个字典.检查字典以查看它是否具有匹配的名称"值.如果是这样，请从描述"数组中删除该字典.

At a high level you need to get a reference to the "description" array. Then iterate through the array getting each dictionary. Check the dictionary to see if it has the matching "name" value. If so, remove that dictionary from the "description" array.

NSString *name = ... // the name to find and remove
NSMutableArray *description = ... // the description array to search
for (NSUInteger i = 0; i < description.count; i++) {
    NSDictionary *data = description[i];
    if ([data[@"name"] isEqualToString:name]) {
        [description removeObjectAtIndex:i];
        break;
    }
}

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