工作可靠的时间戳function只是导致EXC_BAD_INSTRUCTION
我一直在使用这个函数来生成一个时间戳。 我发现它在堆栈溢出的地方。
@objc public class var timestamp: String { return "\(Int(NSDate().timeIntervalSince1970 * 1000))" } 它一直没有问题，但我刚刚得到了一个EXC_BAD_INSTRUCTION：
fatal error: floating point value cannot be converted to Int because it is greater than Int.max
随着这个应用程序的发展接近完成，它让我很紧张，突然看到它导致EXC_BAD_INSTRUCTION。 这是在模拟器中运行，但我有一个有效的date和时间设置。
任何想法或build议或不胜感激。 以下是回溯。
(lldb) bt * thread #1: tid = 0x15c4d, 0x04a30393 libswiftCore.dylib`function signature specialization <Arg[0] = Exploded, Arg[1] = Exploded, Arg[2] = Dead, Arg[3] = Dead> of Swift._fatalErrorMessage (Swift.StaticString, Swift.StaticString, Swift.StaticString, Swift.UInt) -> () + 67, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) frame #0: 0x04a30393 libswiftCore.dylib function signature specialization <Arg[0] = Exploded, Arg[1] = Exploded, Arg[2] = Dead, Arg[3] = Dead> of Swift._fatalErrorMessage (Swift.StaticString, Swift.StaticString, Swift.StaticString, Swift.UInt) -> () + 67 * frame #1: 0x00afe0c9 TDTPhotoLib static TDTDeviceUtilites.timestamp.getter(self=TDTPhotoLib.TDTDeviceUtilites) + 409 at TDTDeviceUtilites.swift:127 frame #2: 0x00166979 Oilist TDTPaintingViewController.finshedSession(sender=0x7aee0fb0, self=0x7e9d3800) -> () + 169 at TDTPaintingViewController.swift:1370 frame #3: 0x00102896 Oilist TDTOilistMenuPainting.goForward(sender=0x7aee0fb0, self=0x7c218770) -> () + 374 at TDTOilistMenuPainting.swift:149 frame #4: 0x0010290d Oilist @objc TDTOilistMenuPainting.goForward(UIButton!) -> () + 61 at TDTOilistMenuPainting.swift:0 frame #5: 0x018a80b5 libobjc.A.dylib -[NSObject performSelector:withObject:withObject:] + 84 frame #6: 0x0336ee38 UIKit -[UIApplication sendAction:to:from:forEvent:] + 118 frame #7: 0x0336edb7 UIKit -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64 frame #8: 0x03512f3b UIKit -[UIControl sendAction:to:forEvent:] + 79 frame #9: 0x035132d4 UIKit -[UIControl _sendActionsForEvents:withEvent:] + 433 frame #10: 0x035122c1 UIKit -[UIControl touchesEnded:withEvent:] + 714 frame #11: 0x033ef52e UIKit -[UIWindow _sendTouchesForEvent:] + 1095 frame #12: 0x033f05cc UIKit -[UIWindow sendEvent:] + 1159 frame #13: 0x03391be8 UIKit -[UIApplication sendEvent:] + 266 frame #14: 0x03366769 UIKit _UIApplicationHandleEventQueue + 7795 frame #15: 0x02423e5f CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 frame #16: 0x02419aeb CoreFoundation __CFRunLoopDoSources0 + 523 frame #17: 0x02418f08 CoreFoundation __CFRunLoopRun + 1032 frame #18: 0x02418846 CoreFoundation CFRunLoopRunSpecific + 470 frame #19: 0x0241865b CoreFoundation CFRunLoopRunInMode + 123 frame #20: 0x07031664 GraphicsServices GSEventRunModal + 192 frame #21: 0x070314a1 GraphicsServices GSEventRun + 104 frame #22: 0x0336ceb9 UIKit UIApplicationMain + 160 frame #23: 0x00131ed1 Oilist main + 145 at AppDelegate.swift:14 frame #24: 0x05631a25 libdyld.dylib start + 1
你的代码会在所有的32位平台（如iPhone 4，5）上崩溃，因为结果
NSDate().timeIntervalSince1970 * 1000 // Eg: 1464850525047.38
不适合32位整数。 作为解决scheme，使用64位整数：
Int64(NSDate().timeIntervalSince1970 * 1000)
或者，如果意图是创build一个表示毫秒的string ，请使用string格式而不是整数转换：
String(format:"%.0f", NSDate().timeIntervalSince1970 * 1000)