ios 获取当前时间

//获得系统时间

NSDate * senddate=[NSDate date];

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

[dateformatter setDateFormat:@"HH:mm"];

NSString * locationString=[dateformatter stringFromDate:senddate];

//[dateformatter setDateFormat:@"YYYY-MM-dd-HH-mm-ss"];

//NSString * morelocationString=[dateformatter stringFromDate:senddate];

//获得系统日期

NSCalendar * cal=[NSCalendar currentCalendar];

NSUInteger unitFlags=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;

NSDateComponents * conponent= [cal components:unitFlags fromDate:senddate];

NSInteger year=[conponent year];

NSInteger month=[conponent month];

NSInteger day=[conponent day];

NSString * nsDateString= [NSString stringWithFormat:@"%4d年%2d月%2d日",year,month,day];

[dateformatter release];