尝试用swift字典中的键字符串填充数组。
var componentArray: [String]
let dict = NSDictionary(contentsOfFile: NSBundle.mainBundle().pathForResource("Components", ofType: "plist")!)
componentArray = dict.allKeys
这将返回一个错误:'AnyObject'与string不相同
也试过
componentArray = dict.allKeys as String
but get: 'String'不能转换为[String]
当前回答
数组从字典键在Swift
componentArray = [String] (dict.keys)
其他回答
斯威夫特5
var dict = ["key1":"Value1", "key2":"Value2"]
let k = dict.keys
var a: [String]()
a.append(contentsOf: k)
这对我很有用。
数组从字典键在Swift
componentArray = [String] (dict.keys)
// Old version (for history)
let keys = dictionary.keys.map { $0 }
let keys = dictionary?.keys.map { $0 } ?? [T]()
// New more explained version for our ducks
extension Dictionary {
var allKeys: [Dictionary.Key] {
return self.keys.map { $0 }
}
}
dict.keys.sorted()
给出[String] https://developer.apple.com/documentation/swift/array/2945003-sorted
extension Array {
public func toDictionary<Key: Hashable>(with selectKey: (Element) -> Key) -> [Key:Element] {
var dict = [Key:Element]()
for element in self {
dict[selectKey(element)] = element
}
return dict
}
}
