[置顶] iOS将标准时间转化为时间戳
NSDateFormatter *date=[[NSDateFormatteralloc] init];
[date setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *d=[date dateFromString:theDate];
NSTimeInterval late=[dtimeIntervalSince1970]*1;
NSDate* dat = [NSDatedateWithTimeIntervalSinceNow:0];
NSTimeInterval now=[dattimeIntervalSince1970]*1;
NSString *timeString=@"";
NSTimeInterval cha=now-late;
if (cha/3600<1) {
timeString = [NSStringstringWithFormat:@"%f", cha/60];
timeString = [timeStringsubstringToIndex:timeString.length-7];
int num= [timeString intValue];
if (num <= 1) {
timeString = [NSStringstringWithFormat:@"刚刚..."];
}else{
timeString = [NSStringstringWithFormat:@"%@分钟前", timeString];
}
}
if (cha/3600>1&&cha/86400<1)//86400=1天
{
timeString = [NSStringstringWithFormat:@"%f", cha/3600];
timeString = [timeStringsubstringToIndex:timeString.length-7];
timeString=[NSStringstringWithFormat:@"%@小时前", timeString];
}
if (cha/86400>1)
{
timeString = [NSStringstringWithFormat:@"%f", cha/86400];
timeString = [timeStringsubstringToIndex:timeString.length-7];
int num=[timeString intValue];
if (num<2) {
timeString=[NSStringstringWithFormat:@"昨天"];
}elseif (num==2){
timeString = [NSStringstringWithFormat:@"前天"];
}elseif (num>2&&num<7){
timeString = [NSStringstringWithFormat:@"%@天前", timeString];
}elseif (num >= 7 && num <=30) {
timeString = [NSStringstringWithFormat:@"1周前"];
}elseif(num > 30 && num <=365){
int month=cha/(86400*30);
timeString=[NSStringstringWithFormat:@"%d",month];
timeString = [NSStringstringWithFormat:@"%@周前",timeString];
}elseif (num >365){
int year=cha/(86400*365);
timeString=[NSStringstringWithFormat:@"%d",year];
timeString = [NSStringstringWithFormat:@"%@年前",timeString];
}
}