func NJLog<T>(message: T,fileName: String = #file,methodName: String = #function,lineNumber: Int = #line)
{
#if DEBUG
// 要把路径最后的字符串截取出来
let fName = ((fileName as NSString).pathComponents.last!)
print("\(fName).\(methodName)[\(lineNumber)]: \(message)")
#endif
}
2.由于Swift没有宏的概念,所以
TARGET -> Build Setting -> Other Swift Flags的Debug状态加一个 -D DEBUG
原文链接：https://www.f2er.com/swift/322124.html