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问题描述
我想在现有字典中插入一个具有相应值的键...
I want to insert a key with a corresponding value in an existing dictionary...
我可以为字典中的现有键设置值,但是我我无法添加新的密钥值...
I am able to set values for existing keys in the dictionary, but I am not able to add a new key value...
任何帮助都将不胜感激。
Any help would be appreciated.
推荐答案
使用NSMutableDictionary
Use NSMutableDictionary
NSMutableDictionary *yourMutableDictionary = [NSMutableDictionary alloc] init];
[yourMutableDictionary setObject:@"Value" forKey:@"your key"];
Swift更新:
以下是上述代码的确切swift副本
The following is the exact swift replica for the code mentioned above
var yourMutableDictionary = NSMutableDictionary()
yourMutableDictionary.setObject("Value", forKey: "Key")
但我建议你使用Swift Dictionary方式。
But i would suggest you to go with Swift Dictionary way.
var yourMutableDictionary = [String: AnyObject]() //Open close bracket represents initialization
//The reason for AnyObject is a dictionary's value can be String or
//Array or Dictionary so it is generically written as AnyObject
yourMutableDictionary["Key"] = "Value"
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