如何在iphone sdk中运行倒计时日期计算天数

Question

我需要倒计时而不是时间

如何在iphone sdk中使用日期来计算天数倒计时

Answer 1

NSDate future = [NSDate dateWithString:@"2010-08-30 00:00:00 +0000"];
NSDate past = [NSDate dateWithString:@"2010-03-15 00:00:00 +0000"];

int days = [future timeIntervalSinceDate:past] / 86400;