How to modify only one Key-Value pair in an NSMutableDictionnary

Question

如果我有一个带有4个键值对的NSMutableDictionnary（存储在.plist中），当从.plist加载字典时，如何仅修改其中一个键值对而不删除其余键对？

Answer 1

您可以为给定键更改单个值，如下所示：

[dict setValue:@"value" forKey:@"key"];

Answer 2

[dictionary setObject:value forKey:key] will assign the value for the specified key; [dictionary removeObjectForKey:key] will remove the key-value pair completely.