swift 各种判断

base64解码

//MARK:base64编码
/**
 *   base64编码
 */
func base64Encoding(plainString:String)->String
{
    
    let plainData = plainString.data(using: String.Encoding.utf8)
    let base64String = plainData?.base64EncodedString(options: NSData.Base64EncodingOptions.init(rawValue: 0))
    return base64String!
}

/**
 *   base64解码
 */
func base64Decoding(encodedString:String)->String
{
    let decodedData = NSData(base64Encoded: encodedString, options: NSData.Base64DecodingOptions.init(rawValue: 0))
    let decodedString = NSString(data: decodedData! as Data, encoding: String.Encoding.utf8.rawValue)! as String
    return decodedString
}

/// 判断字符串是否为空
///
/// - Parameter string: <#string description#>
/// - Returns: <#return value description#>
func EnterStringIsEmpty(string:String) -> Bool{
    
    if string.count > 0  {
        return false
    }
    return true
}

/// 判断字符串是否为空
///
/// - Parameter string: <#string description#>
/// - Returns: <#return value description#>
func EnterStringIsEmptyOp(string:String?)->Bool{
    
    if string == nil || string == "" {
        return true
    }
    return false
}
//MARK:各种格式判断
/**
 *   判断邮箱格式
 */
func EnterIsEmail(email:String) -> Bool {
    let regex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"
    let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
    let isValid = predicate.evaluate(with: email)
    return (isValid ? true : false)
}

/**
 *   判断中英文输入
 */
func EnterIsChineseAndEnglish(string:String) -> Bool {
    let regex = "[\\u4e00-\\u9fa5a-zA-Z0-9]{4,20}"
    let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
    let isValid = predicate.evaluate(with: string)
    return (isValid ? true : false)
}

/**
 *   判断只能输入6位数字
 */
func EnterIsPayPasswordStyle(string:String) -> Bool {
    let regex = "^[0-9]{6}$"
    let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
    let isValid = predicate.evaluate(with: string)
    return (isValid ? true : false)
}

/**
 *   判断只能输入4-20位数字或字母[0-9a-zA-Z]{4,20}
 */
func EnterIsNumbersOrLetters(string:String) -> Bool {
    let regex = "[0-9a-zA-Z]{4,20}"
    let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
    let isValid = predicate.evaluate(with: string)
    return (isValid ? true : false)
}
/**
 *   输入8-20位数字，大写字母和小写字母(?![0-9A-Z]+$)(?![0-9a-z]+$)(?![a-zA-Z]+$)[0-9A-Za-z]{8,20}$
 */
func EnterPasswordStyle(string:String) -> Bool {
    let regex = "(?![0-9A-Z]+$)(?![0-9a-z]+$)(?![a-zA-Z]+$)[0-9A-Za-z]{8,20}$"
    let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
    let isValid = predicate.evaluate(with: string)
    return (isValid ? true : false)
}
//MARK: - 颜色
//RGB转换
func RGB(r:CGFloat,g:CGFloat,b:CGFloat) ->UIColor{
    return UIColor(red: r/255.0, green: g/255.0, blue: b/255.0, alpha: 1.0)
}
//RGBA转换
func RGBA(r:CGFloat,g:CGFloat,b:CGFloat, a:CGFloat) ->UIColor{
    return UIColor(red: r/255.0, green: g/255.0, blue: b/255.0, alpha: a)
}
/// 将十六进制颜色转伟UIColor
/// - Returns: UIColor
public func getUIColorWithHex(hexString:String) -> UIColor {
    //处理数值
    var cString = hexString.uppercased().trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
    
    let length = (cString as NSString).length
    //错误处理
    if (length < 6 || length > 7 || (!cString.hasPrefix("#") && length == 7)){
        return UIColor.white
    }
    
    if cString.hasPrefix("#"){
        cString = (cString as NSString).substring(from: 1)
    }
    
    //字符chuan截取
    var range = NSRange()
    range.location = 0
    range.length = 2
    
    let rString = (cString as NSString).substring(with: range)
    
    range.location = 2
    let gString = (cString as NSString).substring(with: range)
    
    range.location = 4
    let bString = (cString as NSString).substring(with: range)
    
    //存储转换后的数值
    var r:UInt32 = 0,g:UInt32 = 0,b:UInt32 = 0
    //进行转换
    Scanner(string: rString).scanHexInt32(&r)
    Scanner(string: gString).scanHexInt32(&g)
    Scanner(string: bString).scanHexInt32(&b)
    //根据颜色值创建UIColor
    return UIColor(red: CGFloat(r)/255.0, green: CGFloat(g)/255.0, blue: CGFloat(b)/255.0, alpha: 1.0)
}

// MARK: - 根据最大宽度计算宽高
func getLableSize(text: String, maxWidth: CGFloat,font:UIFont) -> CGRect {
    let maxSize = CGSize(width: maxWidth, height: 0)   //注意高度是0
    let size = text.boundingRect(with: maxSize, options: .usesLineFragmentOrigin,
                                 attributes: [NSAttributedStringKey.font:font], context: nil)
    return size
    
}

// MARK: - 字典转字符串
func toJSONString(_ dic:[String : Any]) -> String?{
    let data = try? JSONSerialization.data(withJSONObject: dic, options: [])
    var str = String(data: data!, encoding: String.Encoding.utf8)
    str = str?.replacingOccurrences(of: "/", with: "\\/")
    return str
}
//MARK: - 时间
/*********时间***********/
///1. 返回当前时间 2018-01-01 23:23
func getNOWTime() -> String {
    //获取当前时间
    let now = Date()
    //创建一个日期格式器
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyy-MM-dd HH:mm"
    return dformatter.string(from: now)
}

///1.1 返回当前时间 2018-01-01 23:23:23
func getNOWTimeHHMMSS() -> String {
    //获取当前时间
    let now = Date()
    //创建一个日期格式器
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
    return dformatter.string(from: now)
}

///2. 返回当前时间 2018-01-01
func getNOWTimeYYYY_MM_dd() -> String {
    //获取当前时间
    let now = Date()
    //创建一个日期格式器
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyy-MM-dd"
    return dformatter.string(from: now)
}
///2.1 返回当前时间 2018-01
func getNOWTimeYYYY_MM() -> String {
    //获取当前时间
    let now = Date()
    //创建一个日期格式器
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyy-MM"
    return dformatter.string(from: now)
}
///2.2 返回当前时间 20180101
func getNOWTimeYYYYMMDD() -> String {
    //获取当前时间
    let now = Date()
    //创建一个日期格式器
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyyMMDD"
    return dformatter.string(from: now)
}
///2.3 返回当前时间 201801
func getNOWTimeYYYYMM() -> String {
    //获取当前时间
    let now = Date()
    //创建一个日期格式器
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyyMM"
    return dformatter.string(from: now)
}

///3. 返回当前时间的时间戳
func getTimeIntervalSinceNow()->TimeInterval {
    //获取当前时间
    let now = Date()
    let dformatter = DateFormatter()
    dformatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
    //当前时间的时间戳
    let dateStamp:TimeInterval = now.timeIntervalSince1970
    return dateStamp
}

///3.1时间字符串转为时间戳
func stringToTimeStamp(stringTime:String?)->TimeInterval {
    if let stringTime = stringTime
    {
        let dfmatter = DateFormatter()
        dfmatter.dateFormat="yyyy-MM-dd HH:mm:ss"
        let date = dfmatter.date(from: stringTime)
        let dateStamp:TimeInterval = date!.timeIntervalSince1970
        return dateStamp
    }else{
        return getTimeIntervalSinceNow()
    }
}

///4.1 获取当前日期的前五天的日期
func getBeforeFiveDays() -> [String] {
    var arr:[String] = []
    
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "YYYYMMdd"
    
    let calendar = NSCalendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: Date())
    var dateCom = DateComponents()
    for i in 1...5 {
        dateCom.day = com.day! - i
        dateCom.month = com.month
        dateCom.year = com.year
        let day = calendar.date(from: dateCom)
        arr.append(dateFormatter.string(from: day!))
    }
    
    
    return arr
}
///4.1.2 获取当前日期的前五天的日期
func getBeforeFiveDays_YYYYMMDD() -> [String] {
    var arr:[String] = []
    
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "MM-dd"
    
    let calendar = NSCalendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: Date())
    var dateCom = DateComponents()
    for i in 1...5 {
        dateCom.day = com.day! - i
        dateCom.month = com.month
        dateCom.year = com.year
        let day = calendar.date(from: dateCom)
        arr.append(dateFormatter.string(from: day!))
    }
    
    
    return arr
}

///4.2 获取当前日期的前五个月
func getBeforeFiveMonths() -> [String] {
    var arr:[String] = []
    
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyyMM"
    
    let calendar = NSCalendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: Date())
    var dateCom = DateComponents()
    for i in 1...5 {
        dateCom.month = com.month! - i
        dateCom.year = com.year
        let day = calendar.date(from: dateCom)
        arr.append(dateFormatter.string(from: day!))
    }
    
    
    return arr
}

///4.2.2 获取当前日期的前五个月
func getBeforeFiveMonths_YYYYMM() -> [String] {
    var arr:[String] = []
    
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM"
    
    let calendar = NSCalendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: Date())
    var dateCom = DateComponents()
    for i in 1...5 {
        dateCom.month = com.month! - i
        dateCom.year = com.year
        let day = calendar.date(from: dateCom)
        arr.append(dateFormatter.string(from: day!))
    }
    
    
    return arr
}
///4.3 获取当前日期的前一天的日期 20180101
func getBeforeDay() -> String {
   
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "YYYYMMdd"
    
    let calendar = NSCalendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: Date())
    var dateCom = DateComponents()
  
    dateCom.day = com.day! - 1
    dateCom.month = com.month
    dateCom.year = com.year
    let day = calendar.date(from: dateCom)
    return dateFormatter.string(from: day!)
}
///4.3.2 获取当前日期的前一个月的日期 201801
func getBeforeMonth() -> String {
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "YYYYMM"
    
    let calendar = NSCalendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: Date())
    var dateCom = DateComponents()
    
    dateCom.day = com.day!
    dateCom.month = com.month! - 1
    dateCom.year = com.year
    let day = calendar.date(from: dateCom)
    return dateFormatter.string(from: day!)
}
///4.3.3 获取当前日期 201801
func getMonth() -> String {
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "YYYYMM"
    
//    let calendar = NSCalendar.current
//    _ = calendar.dateComponents([.year,.month,.day], from: Date())
//    let dateCom = DateComponents()
    
//    dateCom.day = com.day!
//    dateCom.month = com.month!
//    dateCom.year = com.year
//    let day = calendar.date(from: dateCom)
//    let day =
    return dateFormatter.string(from: Date())
}

/*********时间***********/

//MARK: - 格式化字符串

/// 获取两位小数点的字符串
///
/// - Parameter string: <#string description#>
/// - Returns: <#return value description#>
func getFloat(string:String?) -> String {
    
    if string == nil || string == ""{
        return "0.00"
    }
    let sf:String = NSString.init(format: "%0.2f", Double(string!)!) as String
    
    return sf
    
}

/// 获取整形字符串
///
/// - Parameter string: <#string description#>
/// - Returns: <#return value description#>
func getInt(string:String?) -> String {
    
    if string == nil || string == ""{
        return "0"
    }
    let sf:String = NSString.init(format: "%d", Int(string!)!) as String
    
    return sf
    
}



/// 判断是不是全是空格
///
/// - Parameter str: <#str description#>
/// - Returns: <#return value description#>
func isAllApacing(str:String?) -> Bool {
    
    if str == nil {
        return true
    }
    
    let set = NSCharacterSet.whitespacesAndNewlines
    let trimedString = str?.trimmingCharacters(in: set)
    if trimedString?.count == 0{
        return  true
    }else{
        return  false
    }

}

//MARK: - 截屏
func cutImageWithView(view:UIView) -> UIImage
{
    // 参数①：截屏区域  参数②：是否透明  参数③：清晰度
    UIGraphicsBeginImageContextWithOptions(view.frame.size, true, UIScreen.main.scale)
    view.layer.render(in: UIGraphicsGetCurrentContext()!)
    let image:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
    UIGraphicsEndImageContext();
    return image;
}