ios - 获取正确的日期并设置通知 ios

Question

我正在尝试为每个周六和周日设置重复通知，但由于某种原因，日期显示错误。这是我的代码

NSCalendar *calendar = [NSCalendar currentCalendar];
unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday | NSCalendarUnitWeekOfYear | NSCalendarUnitWeekOfMonth |NSCalendarUnitWeekOfMonth;
NSDateComponents *comps = [calendar components:unitFlags fromDate:[NSDate date]];
NSDateComponents *dt = [[NSDateComponents alloc]init];
comps.hour   = hour;
comps.minute = [[goal.reminderTimeInfo valueForKey:@"minutes"] intValue];
[dt setMonth:[comps month]];
[dt setYear:[comps year]];
[dt setWeekOfMonth:[comps weekOfMonth]];
comps.weekday = 1;  //Sunday
[dt setWeekday:[comps weekday]];

NSDate *sundayDate = [calendar dateFromComponents:dt];

它应该会发出来

2015-07-05 19:00:00 +0000

但它的给予

2015-07-04 19:00:00 +0000

如果给本地通知一个特定的日期。例如星期天。它会在每个星期天触发吗？

Answer 1

您没有更改 dt 的小时和分钟，但更改了 comps。

NSCalendar *calendar = [NSCalendar currentCalendar];
    unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday | NSCalendarUnitWeekOfYear | NSCalendarUnitWeekOfMonth |NSCalendarUnitWeekOfMonth;
    NSDateComponents *comps = [calendar components:unitFlags fromDate:[NSDate date]];
    NSDateComponents *dt = [[NSDateComponents alloc]init];

    dt.hour   = 19;
    dt.minute = 00;
    [dt setMonth:[comps month]];
    [dt setYear:[comps year]];
    [dt setWeekOfMonth:[comps weekOfMonth]];
    [dt setWeekday:1];

    NSDate *sundayDate = [calendar dateFromComponents:dt];