iOS ISO8601格式的時間日期字串轉換成NSDate
+ (NSDate *)dateFromISO8601String:(NSString *)string {
if (!string) return nil;
struct tm tm;
time_t t;
strptime([string cStringUsingEncoding:NSUTF8StringEncoding], "%Y-%m-%dT%H:%M:%S%z", &tm);
tm.tm_isdst = -1;
t = mktime(&tm);
// return [NSDate dateWithTimeIntervalSince1970:t]; // 零時區
return [NSDate dateWithTimeIntervalSince1970:t + [[NSTimeZone localTimeZone] secondsFromGMT]];//東八區
}
//根據獲取到的時間判斷時間間隔 如 “剛剛”，“一分鐘前”，“一小時前”等；
//獲取時間 是用上面的方法獲取的
+(NSString *)JudgmentTimeIntervalWithISOTime:(NSString *)timeStr{
NSDate *theDate = [self dateFromISO8601String:timeStr];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MM-dd HH:mm"];
NSString * timeString = nil;
NSTimeInterval cha = 0 - [theDate timeIntervalSinceDate:[NSDate date]];
if (cha/3600 < 1) {
timeString = [NSString stringWithFormat:@"%f", cha/60];
timeString = [timeString substringToIndex:timeString.length-7];
int num= [timeString intValue];
if (num <= 1) {
timeString = [NSString stringWithFormat:@"剛剛"];
}else{
timeString = [NSString stringWithFormat:@"%@分鐘前", timeString];
}
}
if (cha/3600 > 1 && cha/86400 < 1) {
timeString = [NSString stringWithFormat:@"%f", cha/3600];
timeString = [timeString substringToIndex:timeString.length-7];
timeString = [NSString stringWithFormat:@"%@小時前", timeString];
}
if (cha/86400 > 1)
{
timeString = [NSString stringWithFormat:@"%f", cha/86400];
timeString = [timeString substringToIndex:timeString.length-7];
int num = [timeString intValue];
if (num < 2) {
timeString = [NSString stringWithFormat:@"昨天"];
}else{
timeString =[dateFormatter stringFromDate:theDate];
}
}
return timeString;
}