iphone - 向 iCarousel 添加反射

Question

我尝试为我的 icarousel 添加反射。首先，我的代码是这样的，并且工作正常。

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index     reusingView:(UIView *)view
{
UIButton* button = (UIButton *)view;
if (button == nil)
{
    //no button available to recycle, so create new one
    UIImage *image = [arrKitapKapaklari objectAtIndex:index];
    button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0.0f, 0.0f, image.size.width, image.size.height);
    [button setTitleColor:[UIColor clearColor] forState:UIControlStateNormal];
    [button setBackgroundImage:image forState:UIControlStateNormal];
    button.titleLabel.font = [button.titleLabel.font fontWithSize:50];
    [button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];
}


//set button label
[button setTitle:[NSString stringWithFormat:@"%i", index] forState:UIControlStateNormal];

return button;

}

更改后，我的代码变成了这样:

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(ReflectionView *)view
{


UIButton* button = nil;
if (button == nil)
{

   view = [[[ReflectionView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 150.0f, 200.0f)] autorelease];
    //no button available to recycle, so create new one
    UIImage *image = [arrKitapKapaklari objectAtIndex:index];
    button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0.0f, 0.0f, image.size.width, image.size.height);
    [button setTitleColor:[UIColor clearColor] forState:UIControlStateNormal];
    [button setBackgroundImage:image forState:UIControlStateNormal];
    button.titleLabel.font = [button.titleLabel.font fontWithSize:50];
    [button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];
        [view addSubview:button];
}



//set button label
[button setTitle:[NSString stringWithFormat:@"%i", index] forState:UIControlStateNormal];
[view update];
return view;

}

出现倒影。但问题是当我移动轮播 View 时，图像无法正确流动。有时会出现另一个轮播 View 。

你知道是什么原因造成的吗？

Answer 1

代码应该是:

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(ReflectionView *)view
{


UIButton* button = nil;
if (view == nil)
{
        //no view available to recycle, so create new one
    view = [[[ReflectionView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 150.0f, 200.0f)] autorelease];

    button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = view.bounds;
    [button setTitleColor:[UIColor clearColor] forState:UIControlStateNormal];
    button.titleLabel.font = [button.titleLabel.font fontWithSize:50];
    [button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];
            button.tag = 99;
        [view addSubview:button];
}
else
{
    button = (UIButton *)[view viewWithTag:99];
}

//set button label
[button setTitle:[NSString stringWithFormat:@"%i", index] forState:UIControlStateNormal];

UIImage *image = [arrKitapKapaklari objectAtIndex:index];
[button setBackgroundImage:image forState:UIControlStateNormal];

[view update];
return view;
}