日期格式化程序在运行相同 iOS 版本的不同设备上有不同的输出
NSDate *currentDate = [NSDate date];
NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:@"MM/dd/yyyy,h,mm,a"];
NSString *dateString = [format stringFromDate:currentDate];
[format release];
NSLog(dateString);
输出于：设备 iPhone4
[240:707] 10/25/2011,22,23,
当前语言：自动；目前objective-c 警告：无法读取 /SDK4.2/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib 的符号
输出：设备 iPad2
[82:707] 10/25/2011,12,28,PM
当前语言：自动；目前objective-c 警告：无法读取 /SDK4.2/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib 的符号
这东西在模拟器上运行得很好。
这要怎么处理呢？
更多信息：
还需要注意的是，相同的格式化字符串会返回 12 小时和 24 小时时钟值
NSDate *currentDate = [NSDate date];
NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:@"MM/dd/yyyy,h,mm,a"];
NSString *dateString = [format stringFromDate:currentDate];
[format release];
NSLog(dateString);
Output in: Device iPhone4
[240:707]10/25/2011,22,23,
Current language: auto; currently objective-c
warning: Unable to read symbols for /SDK4.2/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib
Output in: Device iPad2
[82:707]10/25/2011,12,28,PM
Current language: auto; currently objective-c
warning: Unable to read symbols for /SDK4.2/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib
This thing works fine on Simulator for all.
How to handle this?
More Info:
it is also to notice that the same formatting string resulting in 12 hr and 24 hr clock values in return
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
听起来您在 iPad 和 iPhone 上设置了不同的区域设置，请参阅此处：
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html#//apple_ref/doc/uid/TP40002369-SW1
在两个设备上设置相同的区域设置（如果这只是您的问题）或确保 NSDateFormatter 使用相同的区域设置（硬编码）如果您依赖于某种格式的格式，则区域设置。
编辑：附加信息
这显然是区域设置的问题，这里更详细（带有解决方案）：
http://developer.apple.com/library/ios/#qa /qa1480/_index.html
但我错了，设置语言环境确实没有帮助。
引用：
<代码>
在 iPhone OS 上，用户可以覆盖默认的 AM/PM 与 24 小时时间设置（通过“设置”>“常规”>“日期和时间”>“24 小时时间”），这会导致 NSDateFormatter 重写您设置的格式字符串，这可能会导致您的时间解析失败。
Sounds like you have a different locale set on your iPad and your iPhone, see here:
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html#//apple_ref/doc/uid/TP40002369-SW1
Either set the same locale on both devices (if it's just your problem) or make sure the NSDateFormatter uses the same (hard-coded) locale if you rely on the format being like a certain format.
Edit: Additional Info
It apparently IS a problem with the locale, more detailed here (with solutions):
http://developer.apple.com/library/ios/#qa/qa1480/_index.html
But I was wrong, setting the locale will not help it indeed.
Citation:
On iPhone OS, the user can override the default AM/PM versus 24-hour time setting (via Settings > General > Date & Time > 24-Hour Time), which causes NSDateFormatter to rewrite the format string you set, which can cause your time parsing to fail.
终于解决了。
这是由于手机设置为 24 小时制所致。
我必须相应地更新我的代码。
:)
finally resolved it.
it was due to the settings in phone as 24 Hr clock.
I had to update my code accordingly.
:)