NSDate与NSDateFormatter的相关用法
1.NSDateFormatter配合NSDate与NSString之间的转化 NSDateFormatter有下面2个方法： - (NSString *)stringFromDate:(NSDate *)date;//NSDate转NSString - (NSDate *)dateFromString:(NSString *)string;//NSString转NSDate e.g. NSString *dateString=@"1900-01-01"; NSDateFormatter *dateFormatter=[[NSDateFormatter alloc]init]; [dateFormatter setDateFormat:@"yyyy-MM-dd"]; NSDate *date=[dateFormatter dateFromString:dateString]; [dateFormatter release]; NSString转NSDate与上面类似 NSString *dateString=[dateFormatter dateFromString:[NSDate date]];2.NSDateFormatter 的一些格式介绍 [dateFormatter setDateFormat:@"yyyy年MM月dd日#EEEE"];EEEE为星期几，EEE为周几 [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; [dateFormatter setDateFormat:@"yyyy年MMMMd日"];//MMMM 为xx月，一个d可以省去01日前的03.NSString转NSDate少一天的解决办法 用下面这种格式化方式 1.[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 2. NSCalendar *calendar = [NSCalendar currentCalendar]; NSDateComponents *components = [calendar components:(NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit) fromDate:[NSDate date]]; NSDate *todayDate = [calendar dateFromComponents:components];
