NSDate *date = [NSDate date];

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

[dateFormat setDateFormat:@"yyyy年MM月dd日"];// you can use your format.

for (int a = 0; a<7; a++) {

NSDate *nextDate = [NSDate dateWithTimeInterval:24*60*60*a sinceDate:date];

NSString *timeStr = [dateFormat stringFromDate:nextDate];

[_curYearAndDateArr addObject:timeStr];

NSLog(@"============%@",_curYearAndDateArr);

}