ios 如何获得系统时间和日期
- //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];
2. 从字符串来获得NSDate
- string strYear="1988";
- string strMonth="09";
- string strDay="18";
- string strHour="5";
- string strMinutes="18";
- string strSec="20";
- morelocationString=[NSString stringWithFormat:@"%s-%s-%s-%s-%s-%s",strYear.c_str(),strMonth.c_str(),
- strDay.c_str(),strHour.c_str(),strMinutes.c_str(),strSec.c_str()];
- //根据时间字符串获得NSDate
- NSDateFormatter *dateformatter=[[NSDateFormatter alloc] init];
- [dateformatter setDateFormat:@"YYYY-MM-dd-HH-mm-ss"];
- NSDate * oldDate=[dateformatter dateFromString:morelocationString];
3. 从GMT时间,得到本地时间
- NSDate * oldDate=[dateformatter dateFromString:morelocationString];
- NSTimeInterval timeZoneOffset=[[NSTimeZone systemTimeZone] secondsFromGMT];
- NSDate * newDate=[oldDate dateByAddingTimeInterval:timeZoneOffset];
原文链接:http://blog.csdn.net/tangaowen/article/details/6525915
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