objective-c - 列出前六个月

Question

我正在寻找一种方法来获取从今天起过去六个月的清单。

今天是五月，所以我会寻找以下输出：

May 2013,
Apr 2013,
Mar 2013,
Feb 2013,
Jan 2013,
Dec 2012

我知道这将与NSDateComponents，但我找不到任何帮助。

Answer 1

试试这个，你可以int i根据你的选择改变值

NSDate *today = [[NSDate alloc] init];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];

for (int i = 0; i <=6 ;i++) {
    [offsetComponents setMonth:-i];

    NSDate *dateStr = [gregorian dateByAddingComponents:offsetComponents toDate:today options:0];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"MMMM YYYY"];
    NSString *stringFromDate = [formatter stringFromDate:dateStr];
    NSLog(@"%@", stringFromDate);
}

Answer 2

我建议将MTDates与以下内容一起使用：

[[NSDate date] mt_dateMonthsBefore:1];
[[NSDate date] mt_dateMonthsBefore:2];
[[NSDate date] mt_dateMonthsBefore:3];
[[NSDate date] mt_dateMonthsBefore:4];
[[NSDate date] mt_dateMonthsBefore:5];
[[NSDate date] mt_dateMonthsBefore:6];