將特定格式轉換爲NSDate

Question

我從@「2014-01-08T00：00：00.000Z」從Web服務獲取日期組件。我需要將它轉換爲只提供年份，月份和日期的日期。請幫助

Answer 1

使用此代碼來獲取當前日期

NSDateFormatter *dateFor=[[NSDateFormatter alloc]init]; 
NSString *currentDateString = @"2014-01-08T21:21:22.737+05:30"; 

[dateFor setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSZZZZ"];   
NSDate *currentDate = [dateFor dateFromString:currentDateString]; 

NSLog(@"CurrentDate:%@", currentDate); 

Answer 2

如果需要輸出年 - 月-date在這樣的格式，然後用下面的代碼。另外你需要的格式轉換成以下格式指定： -

NSString *currentDateString = @"2014-01-08T00:00:00.000Z"; 
self.dateFormatter=[[NSDateFormatter alloc]init]; 
[self.dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSZ"]; 
NSDate *currentDate = [self.dateFormatter dateFromString:currentDateString]; 
[self.dateFormatter setDateFormat:@"yyyy-MM-dd"]; 
    currentDateString=[self.dateFormatter stringFromDate:currentDate]; 
NSLog(@"CurrentDate:%@", currentDateString); 

輸出： -

CurrentDate:2014-01-08 

Answer 3

正從字符串的日期再次改變dateformatter的格式，然後經過使用獲得的字符串格式化。

NSString *currentDateString = @"2014-01-08T21:21:22.737+05:30"; 

NSDateFormatter *dateFor=[[NSDateFormatter alloc]init]; 
[dateFor setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSZZZZ"];   
NSDate *currentDate = [dateFor dateFromString:currentDateString]; 
[dateFor setDateFormat:@"MMMM dd, yyyy"]; 

// above format will show date as Dec 31, 2013 something like this 
// can use other format as well like. [dateFor setDateFormat:@"yyyy-MM-dd"] 

NSString *dateString = [dateFor stringFromDate:currentDate];