iOS 时间戳转成今天,上午,下午,星期几,几月几日,某年某月某日

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项目中有聊天功能,老板让聊天的时间转换成和 QQ 的聊天时间一样的格式,

研究了一下,来分析下 QQ 的聊天格式时间

代码:

会话列表显示的时间如需转成24小时制,需要使用 HH

//时间显示内容
-(NSString *)getDateDisplayString:(long long) miliSeconds{
NSLog(@"-时间戳---%lld_----",miliSeconds); NSTimeInterval tempMilli = miliSeconds;
NSTimeInterval seconds = tempMilli/1000.0;
NSDate *myDate = [NSDate dateWithTimeIntervalSince1970:seconds]; NSCalendar *calendar = [ NSCalendar currentCalendar ];
int unit = NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear ;
NSDateComponents *nowCmps = [calendar components:unit fromDate:[ NSDate date ]];
NSDateComponents *myCmps = [calendar components:unit fromDate:myDate]; NSDateFormatter *dateFmt = [[NSDateFormatter alloc ] init ]; //2. 指定日历对象,要去取日期对象的那些部分.
NSDateComponents *comp = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:myDate]; if (nowCmps.year != myCmps.year) {
dateFmt.dateFormat = @"yyyy-MM-dd hh:mm";
} else {
if (nowCmps.day==myCmps.day) {
dateFmt.AMSymbol = @"上午";
dateFmt.PMSymbol = @"下午";
dateFmt.dateFormat = @"aaa hh:mm"; } else if((nowCmps.day-myCmps.day)==) {
dateFmt.dateFormat = @"昨天";
} else {
if ((nowCmps.day-myCmps.day) <=) {
switch (comp.weekday) {
case :
dateFmt.dateFormat = @"星期日";
break;
case :
dateFmt.dateFormat = @"星期一";
break;
case :
dateFmt.dateFormat = @"星期二";
break;
case :
dateFmt.dateFormat = @"星期三";
break;
case :
dateFmt.dateFormat = @"星期四";
break;
case :
dateFmt.dateFormat = @"星期五";
break;
case :
dateFmt.dateFormat = @"星期六";
break;
default:
break;
}
}else {
dateFmt.dateFormat = @"MM-dd hh:mm";
}
}
}
return [dateFmt stringFromDate:myDate];
}

聊天列表显示时间:

//时间显示内容
-(NSString *)getDateDisplayString:(long long) miliSeconds{
NSLog(@"-时间戳---%lld_----",miliSeconds); NSTimeInterval tempMilli = miliSeconds;
NSTimeInterval seconds = tempMilli/1000.0;
NSDate *myDate = [NSDate dateWithTimeIntervalSince1970:seconds]; NSCalendar *calendar = [ NSCalendar currentCalendar ];
int unit = NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear ;
NSDateComponents *nowCmps = [calendar components:unit fromDate:[ NSDate date ]];
NSDateComponents *myCmps = [calendar components:unit fromDate:myDate]; NSDateFormatter *dateFmt = [[NSDateFormatter alloc ] init ]; //2. 指定日历对象,要去取日期对象的那些部分.
NSDateComponents *comp = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:myDate]; if (nowCmps.year != myCmps.year) {
dateFmt.dateFormat = @"yyyy-MM-dd hh:mm";
} else {
if (nowCmps.day==myCmps.day) {
dateFmt.AMSymbol = @"上午";
dateFmt.PMSymbol = @"下午";
dateFmt.dateFormat = @"aaa hh:mm"; } else if((nowCmps.day-myCmps.day)==) {
dateFmt.AMSymbol = @"上午";
dateFmt.PMSymbol = @"下午";
dateFmt.dateFormat = @"昨天 aaahh:mm"; } else {
if ((nowCmps.day-myCmps.day) <=) { dateFmt.AMSymbol = @"上午";
dateFmt.PMSymbol = @"下午"; switch (comp.weekday) {
case :
dateFmt.dateFormat = @"星期日 aaahh:mm";
break;
case :
dateFmt.dateFormat = @"星期一 aaahh:mm";
break;
case :
dateFmt.dateFormat = @"星期二 aaahh:mm";
break;
case :
dateFmt.dateFormat = @"星期三 aaahh:mm";
break;
case :
dateFmt.dateFormat = @"星期四 aaahh:mm";
break;
case :
dateFmt.dateFormat = @"星期五 aaahh:mm";
break;
case :
dateFmt.dateFormat = @"星期六 aaahh:mm";
break;
default:
break;
}
}else {
dateFmt.dateFormat = @"MM-dd hh:mm";
}
}
}
return [dateFmt stringFromDate:myDate];
}