Date format for 2016-10-20T13:01:47.317

问题

This is what I am trying for getting date from the string 2016-10-20T13:01:47.317 but getting nil

NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
dateString = [dateString substringToIndex:dateString.length - 3];
[dateFormatter1 setDateFormat:@"YYYY-MM-ddTHH:mm:ss"];
NSDate *date = [dateFormatter1 dateFromString:dateString]; 

Also tried with yyyy but still getting nil.
I was not able to understand .317 so I eliminated that from the string. What shall be the date format for this ?

回答1:

it .317 means milliseconds use SSS

NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
[dateFormatter1 setDateFormat:@"yyyy-MM-ddTHH:mm:ss.SSS"]; // or omit the timezone use `yyyy-MM-dd'T'HH:mm:ss.SSS`
 NSDate *date = [dateFormatter1 dateFromString:dateString]; 

回答2:

You need to use this DateFormatter yyyy-MM-dd'T'HH:mm:ss.SSS in your code

NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
[dateFormatter1 setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"];
NSDate *date = [dateFormatter1 dateFromString:dateString]; 

Here date is not nil

回答3:

Try to use date format as

NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
[dateFormatter1 setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"];
NSDate *date = [dateFormatter1 dateFromString:dateString]; 

回答4:

Try this for remove millisecond :

NSString *dateString = @"your string";
NSDateFormatter* dateFormatter1 = [[NSDateFormatter alloc] init];
dateFormatter1.dateFormat = @"YYYY-MM-ddTHH:mm:ss.SSS";
NSDate *yourDate = [dateFormatter1 dateFromString:dateString];
dateFormatter1.dateFormat = @"YYYY-MM-ddTHH:mm:ss";
NSLog(@"%@",[dateFormatter1 stringFromDate:yourDate]);

来源：https://stackoverflow.com/questions/40462766/date-format-for-2016-10-20t130147-317