IKImageBrowserView 移动项目没有动画
我有一个 IKImageBrowser 设置，看起来运行良好。我已将其设置为允许重新排序，并将动画设置为“是”（在我的 awakeFromNib 中），但是每当我选择并尝试重新排序图像时，我都会遇到奇怪的行为：
1）大多数时候它们不会重新排序 2）如果他们这样做了，他们就不会动画 3）有时图像会相互重叠，如果我滚动并返回，它们就会回到原来的位置。
如果我突出显示图像并将其删除，它会按预期动画并消失......
这是核心动画的问题吗？我需要向界面生成器中的对象添加核心动画层吗？我按照 Apple 的本教程获得了这些结果： http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/ImageKitProgrammingGuide/ImageBrowser/ImageBrowser.html#//apple_ref/doc/ uid/TP40004907-CH5-SW1
这是有问题的代码：
- (BOOL) imageBrowser:(IKImageBrowserView *) aBrowser moveItemsAtIndexes: (NSIndexSet *)indexes toIndex:(NSUInteger)destinationIndex{
int index;
NSMutableArray *temporaryArray;
temporaryArray = [[[NSMutableArray alloc] init] autorelease];
for(index=[indexes lastIndex]; index != NSNotFound;
index = [indexes indexLessThanIndex:index])
{
if (index < destinationIndex)
destinationIndex --;
id obj = [mImages objectAtIndex:index];
[temporaryArray addObject:obj];
[mImages removeObjectAtIndex:index];
}
// Insert at the new destination
int n = [temporaryArray count];
for(index=0; index < n; index++){
[mImages insertObject:[temporaryArray objectAtIndex:index]
atIndex:destinationIndex];
}
return YES;
}
有趣的是，这一行会引发警告
for(index=[indexes lastIndex]; index != NSNotFound;
比较总是正确的，因为 数据类型范围有限
I have an IKImageBrowser setup which appears to be working well. I have set it up to allow reordering and also set animation to YES (in my awakeFromNib), however whenever I select and try and reorder the images I get strange behaviour:
1) They don't reorder most of the time
2) If they do they don't animate
3) Sometimes the images land on each other, if I scroll away and back they are back where they started.
If I highlight an image and delete it, it animates and disappears as expected...
Is this a problem with Core Animation? Do I need to add a core animation layer to the object in interface builder? I followed this tutorial from Apple to get these results: http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/ImageKitProgrammingGuide/ImageBrowser/ImageBrowser.html#//apple_ref/doc/uid/TP40004907-CH5-SW1
Here's the code in question:
- (BOOL) imageBrowser:(IKImageBrowserView *) aBrowser moveItemsAtIndexes: (NSIndexSet *)indexes toIndex:(NSUInteger)destinationIndex{
int index;
NSMutableArray *temporaryArray;
temporaryArray = [[[NSMutableArray alloc] init] autorelease];
for(index=[indexes lastIndex]; index != NSNotFound;
index = [indexes indexLessThanIndex:index])
{
if (index < destinationIndex)
destinationIndex --;
id obj = [mImages objectAtIndex:index];
[temporaryArray addObject:obj];
[mImages removeObjectAtIndex:index];
}
// Insert at the new destination
int n = [temporaryArray count];
for(index=0; index < n; index++){
[mImages insertObject:[temporaryArray objectAtIndex:index]
atIndex:destinationIndex];
}
return YES;
}
Interestingly, this line throws a warning
for(index=[indexes lastIndex]; index != NSNotFound;
comparison is always true due to
limited range of data type
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评论（1）
正如 NSGod 上面提到的，将
int index更改为NSUInteger index解决了问题As mentioned above by NSGod, changing
int indextoNSUInteger indexsolved the problem