//計算還款日與當前時間的差

- (int)intervalSinceNow: (NSString *) theDate {

//? ? NSDateFormatter *formatter=[[NSDateFormatter alloc] init];

//? ? [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

//? ? NSDate *date = [formatter dateFromString:theDate];

//

//? ? NSString *string = [formatter stringFromDate:[NSDate date]];

//? ? NSLog(@"->>> %@", string);

//

//? ? NSTimeInterval late = [date timeIntervalSince1970]*1;

//

//? ? NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];

//? ? NSTimeInterval now = [dat timeIntervalSince1970]*1;

//? ? NSString *timeString = @"";

//

//? ? NSTimeInterval cha = now - late;

//

//? ? if (cha/86400 > 1) {

//? ? ? ? timeString = [NSString stringWithFormat:@"%f", cha/86400];

//? ? ? ? timeString = [timeString substringToIndex:timeString.length-7];

//? ? ? ? return [timeString intValue];

//? ? }

//? ? return -1;

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

[date setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSDate *d=[date dateFromString:theDate];

NSTimeInterval late=[d timeIntervalSince1970]*1;

NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];

NSTimeInterval now=[dat timeIntervalSince1970]*1;

NSString *timeString=@"";

NSTimeInterval cha=now-late;

if (cha/86400>1)

{

timeString = [NSString stringWithFormat:@"%f", cha/86400];

timeString = [timeString substringToIndex:timeString.length-7];

return [timeString intValue];

}

return -1;

}