的iOS：UTC时区转换为设备本地时区

Question

我想下面的时区转换为设备本地时区：

2013-08-03T05:38:39.590Z 

请让我知道如何将它转换为本地时区。

我该怎么做？

Answer 1

时区可应用于NSDateFormatter，您可以根据这些时区生成区分时差的NSDate变量。

NSString* input = @"2013-08-03T05:38:39.590Z"; 
NSString* format = @"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"; 

// Set up an NSDateFormatter for UTC time zone 
NSDateFormatter* formatterUtc = [[NSDateFormatter alloc] init]; 
[formatterUtc setDateFormat:format]; 
[formatterUtc setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; 

// Cast the input string to NSDate 
NSDate* utcDate = [formatterUtc dateFromString:input]; 

// Set up an NSDateFormatter for the device's local time zone 
NSDateFormatter* formatterLocal = [[NSDateFormatter alloc] init]; 
[formatterLocal setDateFormat:format]; 
[formatterLocal setTimeZone:[NSTimeZone localTimeZone]]; 

// Create local NSDate with time zone difference 
NSDate* localDate = [formatterUtc dateFromString:[formatterLocal stringFromDate:utcDate]]; 

NSLog(@"utc: %@", utcDate); 
NSLog(@"local: %@", localDate); 

[formatterUtc release]; 
[formatterLocal release]; 

Answer 2

尝试这样的：

NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init]; 
    [dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]]; 
    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"]; 
    NSDate* utcTime = [dateFormatter dateFromString:@"2013-08-03T05:38:39.590Z"]; 
    NSLog(@"UTC time: %@", utcTime); 

    [dateFormatter setTimeZone:[NSTimeZone systemTimeZone]]; 
    [dateFormatter setDateFormat:@"M/d/yy 'at' h:mma"]; 
    NSString* localTime = [dateFormatter stringFromDate:utcTime]; 
    NSLog(@"localTime:%@", localTime); 

希望它可以帮助你.... [如何时间转换为iPhone设备的时区？（HTTP的