这段代码有什么问题？
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
}
如果匹配运行或90分钟,我需要在表中显示此图像
解决方法
我不知道你调用valueForKey是什么对象：on,但是假定它返回一个NSDate对象,你对description的额外调用将会将一个NSString(描述的返回值)分配给matchDateCD.这不是你想要做的.
这是你想要做的：
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
}
