如何从快速字典中删除键值对？

我想从字典中删除一个键-值对，如示例所示。

var dict: Dictionary<String,String> = [:]
//Assuming dictionary is added some data.
var willRemoveKey = "SomeKey"
dict.removePair(willRemoveKey) //that's what I need

swift
dictionary
swift2

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dict.removeValue(forKey: willRemoveKey)

Or you can use the subscript syntax:

dict[willRemoveKey] = nil

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最佳答案

You can use this:

dict[willRemoveKey] = nil

or this:

dict.removeValueForKey(willRemoveKey)

The only difference is that the second one will return the removed value (or nil if it didn't exist)

Swift 3

dict.removeValue(forKey: willRemoveKey)

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Swift 5, Swift 4, and Swift 3:

x.removeValue(forKey: "MyUndesiredKey")

Cheers

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var dict: [String: Any] = ["device": "iPhone", "os": "12.0", "model": "iPhone 12 Pro Max"]


if let index = dict.index(forKey: "device") {
dict.remove(at: index)
}


print(dict) // ["os": "12.0", "model": "iPhone 12 Pro Max"]