let startTime = CFAbsoluteTimeGetCurrent()
//要執行的代碼
//...
let endTime = CFAbsoluteTimeGetCurrent()
debugPrint("代碼執行時長:%f 毫秒", (endTime - startTime)*1000)
let startTime = CFAbsoluteTimeGetCurrent()
//要執行的代碼
//...
let endTime = CFAbsoluteTimeGetCurrent()
debugPrint("代碼執行時長:%f 毫秒", (endTime - startTime)*1000)