JSON数据转换

字典：

extension Dictionary {

/// 将字典转为 JSON 字符串
///
/// - Returns: JSON 字符串
func toJSONData() -> Data? {
    guard JSONSerialization.isValidJSONObject(self) else {return nil}
    do {
        let jsonData = try JSONSerialization.data(withJSONObject: self, options: .prettyPrinted)
        return jsonData
    }catch {
        return nil
    }
}
}

数组：

extension Array {

/// 将数组转为 JSON 字符串
///
/// - Returns: JSON 字符串
func toJSONData() -> Data? {
    guard JSONSerialization.isValidJSONObject(self) else {return nil}
    do {
        let jsonData = try JSONSerialization.data(withJSONObject: self, options: .prettyPrinted)
        return jsonData
    }catch {
        return nil
    }
}
}

字符串

extension String {
func toJSONData() -> Data? {
    return self.data(using: .utf8)
}
}

Data数据

extension Data {

func JSONToStr() -> String {
    return String(data: self, encoding: .utf8) ?? ""
}

/// JSON 解析
///
/// - Returns: JSON 解析后的对象
func JSONToAny() -> Any {
    do {
        let result = try JSONSerialization.jsonObject(with: self, options: .mutableContainers)
        return result
    } catch  {
        return self
    }
}

/// 图片压缩
func compressImage(maxKB: CGFloat? = 1024.0) -> UIImage? {
    let size = CGFloat(self.count) / 1024.0 / maxKB!
    var rate: CGFloat = 1.0 - 0.1 * size
    if rate < 0.1 { rate = 0.1 }
    
    return UIImage(data: self, scale: rate)
}

}