iOS开发中，常常需要打印日志Debug程序，NSLog输出过于单一常常不能满足我们的需求，DLog 能输出行号、类名、方法命更便于调试。
- OC中的DLog
DLog
#ifdef DEBUG
#define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#define DLog(...)
#endif
ALog
#define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
在工程Bulid Settings的other C Flags的Debug中加入-DDEBUG,就能在工程Debug版本中调用DLog,在Release版本中不调用
- Swift中的DLog
#if DEBUG
func DLog<T>(_ object: T, filename: String = #file, function: String = #function, line: Int = #line) {
let fileString = filename as NSString
let fileLastPathComponent = fileString.lastPathComponent as NSString
let filename = fileLastPathComponent.deletingPathExtension
print("[\(filename):\(line)] \(function) - \(object)")
}
#else
func DLog<T>(_ object: T, filename: String = #file, function: String = #function, line: Int = #line) {
}
#endif
