swift一些常用系统方法的简化使用

//获取Image
func FImage(_ imageName:String) -> UIImage {
    
    return UIImage(named:imageName)!
}

//获取Url
func FUrl(_ urlString: String) -> URL? {
    return URL(string: urlString)
}

//验证是手机号的格式
func isPhone(phone: String) -> Bool{
    
    let regex = "^1[3|4|5|7|8][0-9]\\d{8}$"
    let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
    return predicate.evaluate(with: phone)
}