加入NSDate 90分钟 [英] Add 90 min to NSDate

问题描述

此代码有什么问题？

NSDate *matchDateCD = [[object valueForKey:@"matchDate"] description]; // from coredata NSDate
NSDate *add90Min = [matchDateCD dateByAddingTimeInterval:5400];



if ( matchDateCD >=[NSDate date] || add90Min <= matchDateCD )
{

    cell.imageView.image = [UIImage imageNamed: @"r.gif"];//Show image in the table

}    

如果比赛正在进行或90分钟，我需要在表格中显示此图像

I need to show this image in the table if the match is running or for 90 min

推荐答案

我不知道对象是什么，你调用 valueForKey： on是但假设它返回 NSDate 对象，您对 description 的额外调用将​​分配 NSString （描述的返回值）到 matchDateCD 。这不是你想要做的。

I don't know what object is that you call valueForKey: on is but presuming it returns an NSDate object, your additional call to description will assign an NSString (the return value of description) to matchDateCD. That is not what you want to do.

这就是你想要做的事情：

This is what you want to do:

NSDate *matchDateCD = [object valueForKey:@"matchDate"];
NSDate *add90Min = [matchDateCD dateByAddingTimeInterval:(90*60)]; // compiler will precompute this to be 5400, but indicating the breakdown is clearer

if ( [matchDateCD earlierDate:[NSDate date]] != matchDateCD ||
     [add90Min laterDate:matchDateCD] == add90Min )
{
    cell.imageView.image = [UIImage imageNamed: @"r.gif"];//Show image in the table
}

这篇关于加入NSDate 90分钟的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！