/// 单参数打印函数
///
/// - Parameters:
/// - message:打印
/// - file: 文件名，默认值：#file
/// - line: 第几行，默认值：#line
/// - method: 函数名，默认值：#function
func printLog(_ message: Any,
file: String = #file,
line: Int = #line,
method: String = #function)
{
#if DEBUG
print("\((file as NSString).lastPathComponent)[\(line)], \(method): \(message)")
#endif
}
//调用
let a = 2
printLog(a)
//打印结果：ViewController.swift[59], printLog(): 2
/// 可变参打印函数
///
/// - Parameters:
/// - items: Zero or more items to print.
/// - separator: A string to print between each item. The default is a single space (`" "`).
/// - terminator: The string to print after all items have been printed. The default is a newline (`"\n"`).
/// - file: 文件名，默认值：#file
/// - line: 第几行，默认值：#line
/// - method: 函数名，默认值：#function
func printLog(_ items: Any...,
separator: String = " ",
terminator: String = "\n",
file: String = #file,
line: Int = #line,
method: String = #function)
{
#if DEBUG
//如果不怕打印结果有大括号[4, "abc", [1, 2, 3]]，可以直接一句话
//print("\((file as NSString).lastPathComponent)[\(line)], \(method):", items)
print("\((file as NSString).lastPathComponent)[\(line)], \(method):", terminator: separator)
var i = 0
let j = items.count
for a in items {
i += 1
print(a, terminator:i == j ? terminator: separator)
}
#endif
}
//调用
printLog(4, "abc", [1,2,3])
//打印结果：ViewController.swift[89], printLog(): 4 abc [1, 2, 3]
