NSDate *currentDate = [NSDate date];
NSDate *lastDay = [NSDate dateWithTimeInterval:-24*60*60 sinceDate:date];//前一天
NSDate *nextDay = [NSDate dateWithTimeInterval:24*60*60 sinceDate:date];//后一天
NSDictionary * timeDic = @{@"beginTime":[Utility timeStringFromFormat:@"yyyy-MM-dd" withDate:lastDay],@"endTime":[Utility timeStringFromFormat:@"yyyy-MM-dd" withDate:nextDay]};
int days = 7; // n天后的天数 NSDate *appointDate; // 指定日期声明 NSTimeInterval oneDay = 24 * 60 * 60; // 一天一共有多少秒 appointDate = [currentDate initWithTimeIntervalSinceNow: appointDate * days];
appointDate = [currentDate initWithTimeIntervalSinceNow: -(appointDate * days)];
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