通常字典轉(zhuǎn)data我們會(huì)使用JSONSerialization的類方法，但轉(zhuǎn)化后的字典轉(zhuǎn)為字符串JSON串后會(huì)帶有空格以及轉(zhuǎn)義字符棚亩。
解決辦法：將轉(zhuǎn)義字符以及空格用空字符串替換掉胧瓜，代碼如下
let modeString = "dark"
let themeDict = ["theme": modeString]
if let data = try? JSONSerialization.data(withJSONObject: themeDict, options: .prettyPrinted), var utf8 = String.init(data: data, encoding: .utf8) {
utf8 = utf8.replacingOccurrences(of: "\n", with: "").replacingOccurrences(of: " ", with: "")
if let themeJsonString = utf8.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) {
}
}
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