从字符串创建 NSDate

I have an NSString like this: @"3/15/2012 9:15 PM" and I would like to convert it to NSDate, I have done like this:

NSString *str =@"3/15/2012 9:15 PM";
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:@"mm/dd/yyyy HH:mm"];
NSDate *date = [formatter dateFromString:];

NSLog(@"%@", date);  // date = null

你能帮帮我吗，谢谢.

推荐答案

使用如下解决方案

NSString *str = @"3/15/2012 9:15 PM";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @"MM/dd/yyyy HH:mm a";

NSDate *date = [formatter dateFromString:str];

NSLog(@"%@", date);

对不起，格式应该如下:

Sorry, the format should be as follows:

formatter.dateFormat = @"MM/dd/yyyy hh:mm a";

显示的时间将是格林威治标准时间.因此，如果您添加/减去时区，将是晚上 9:15.

And the time shown will be GMT time. So if you add/subtract the timezone, it would be 9:15 PM.

#2

如下使用.你也会得到准确的时间.

Use as below. You would get exact time too.

NSString *str = @"3/15/2012 9:15 PM";

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @"MM/dd/yyyy hh:mm a";

NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];

formatter.timeZone = gmt;

NSDate *date = [formatter dateFromString:str];

NSLog(@"%@",date);

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