迅捷3
在Swift 3中有
addingPercentEncoding
let originalString = "test/test"let escapedString = originalString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)print(escapedString!)
输出：
测试％2Ftest
斯威夫特1
在iOS 7及更高版本中，
stringByAddingPercentEncodingWithAllowedCharacters
var originalString = "test/test"var escapedString = originalString.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())println("escapedString: (escapedString)")输出：
测试％2Ftest
以下是有用的（倒置）字符集：
URLFragmentAllowedCharacterSet "#%<>[]^`{|}URLHostAllowedCharacterSet "#%/<>?@^`{|}URLPasswordAllowedCharacterSet "#%/:<>?@[]^`{|}URLPathAllowedCharacterSet "#%;<>?[]^`{|}URLQueryAllowedCharacterSet "#%<>[]^`{|}URLUserAllowedCharacterSet "#%/:<>?@[]^`如果要转义其他字符集，请创建一个字符集：
添加了“ =”字符的示例：
var originalString = "test/test=42"var customAllowedSet = NSCharacterSet(charactersInString:"="#%/<>?@\^`{|}").invertedSetvar escapedString = originalString.stringByAddingPercentEncodingWithAllowedCharacters(customAllowedSet)println("escapedString: (escapedString)")输出：
测试％2Ftest％3D42
验证不在集合中的ASCII字符的示例：
func printCharactersInSet(set: NSCharacterSet) { var characters = "" let iSet = set.invertedSet for i: UInt32 in 32..<127 { let c = Character(UnipreScalar(i)) if iSet.longCharacterIsMember(i) { characters = characters + String(c) } } print("characters not in set: '(characters)'")}
