objective-c - NSString 转 NSDate

Question

• (nullable NSDate )dateFromString:(NSString )string;
  这个方法之前可以用,现在获取到的date 为nil

Answer 1

This should be the conversion between NSDate and NSString. You can use this method to convert after getting the date, instead of using this method to get the date

Answer 2

1. First, the NSString passed in must be in a fixed format.
2. Then set NSDateFormatter to follow the same format.
3. Convert to time. If it is still nil... (As if I didn't say it----)

 NSString *str =  @"2015-11-26 17:51:51"; 
 NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
 [dateformatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
 NSDate *date = [dateformatter dateFromString: str];