Question

我想以30分钟的间隔分割时间，所以我可以得到这样的时间：

12:00 AM 12:10 AM 12:20 AM ..........直到晚上11:50。

我正在尝试这样的事情：

NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:@"hh:mm a"];
NSDate* fromTime = [timeFormat dateFromString:startTime];
NSDate* toTime = [timeFormat dateFromString:endTime];

NSLog(@"Start time %@",fromTime);
NSLog(@"End time %@",toTime);

NSDate *dateByAddingThirtyMinute;

dateByAddingThirtyMinute = [fromTime dateByAddingTimeInterval:1800];

NSString *formattedDateString;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateFormat:@"hh:mm a"];  
formattedDateString = [dateFormatter stringFromDate:dateByAddingThirtyMinute];  

NSLog(@"Time after 10 min %@",formattedDateString);

但我可以打印前十分钟分裂...... 任何人都可以帮助我如何循环它...

Answer 1

其他两个答案都是错误的，因为它们没有考虑夏令时。为此，您必须使用NSDateComponents和NSCalendar：

NSDate *startDate = ...;
NSDate *endDate = ...;
NSDateComponents *diff = [[NSDateComponents alloc] init];
[diff setMinute:0];
NSCalendar *cal = [NSCalendar currentCalendar];
NSDate *tmp = startDate;

NSMutableArray *dates = [NSMutableArray arrayWithObject:tmp];

while ([tmp laterDate:endDate] == endDate) {
  [diff setMinute:[diff minute] + 10];
  tmp = [cal dateByAddingComponents:diff toDate:startDate options:0];
  [dates addObject:tmp];
}

在这段代码中，我实际上并没有通过NSDate运行NSDateFormatter个对象，因为这应该发生在不同的级别。此代码全部与基础数据（模型）有关，NSDateFormatter通常在用户可见级别（视图）运行。另外，拥有原始数据对象通常比格式化字符串更有用。

Answer 2

试试这个

int numberOfIntervals = [toDate timeIntervalSinceDate:fromDate]/(10*60);
for (int i = 0; i < numberOfIntervals; i++) {
    NSDate *theDate = [date dateByAddingTimeInterval:i * 60 * 10];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"hh:mm a"];  
    NSString *formattedDateString = [dateFormatter stringFromDate:dateByAddingThirtyMinute];
    NSLog(@"Time after 10 min %@",formattedDateString);
    [dateFormatter release];
}

Answer 3

尝试使用以下代码

    NSString *startTime = @"12:00 AM";  
    NSString *endTime = @"11:40 AM";


    NSDateFormatter *timeFormat = [[[NSDateFormatter alloc] init] autorelease];
    [timeFormat setDateFormat:@"hh:mm a"]; 
    NSDate* fromTime = [timeFormat dateFromString:startTime]; 
    NSDate* toTime = [timeFormat dateFromString:endTime];
    NSDate *dateByAddingThirtyMinute ;
    NSTimeInterval timeinterval = [toTime timeIntervalSinceDate:fromTime];
    NSLog(@"time Int %f",timeinterval/3600);
    float numberOfIntervals = timeinterval/3600;
    NSLog(@"Start time %f",numberOfIntervals);

    for(int iCount = 0;iCount<numberOfIntervals*6 ;iCount ++)
    {
        dateByAddingThirtyMinute = [fromTime dateByAddingTimeInterval:600];
        fromTime = dateByAddingThirtyMinute;
        NSString *formattedDateString; 
        NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
        [dateFormatter setDateFormat:@"hh:mm a"];
        formattedDateString = [dateFormatter stringFromDate:dateByAddingThirtyMinute];
        NSLog(@"Time after 10 min %@",formattedDateString);
    }

在iphone中将时间分割为10分钟

3 个答案: