我想自定义 IKImageBrowserView,以便我可以在 IKImageBrowserView 的单元格上添加 NSButton 或其他控件。我尝试剪切 IKBrowserViewCell 类,但我不知道如何以及在哪里添加 NSbutton,以便它显示在 IKBrowserViewItem 上。 这是我到目前为止尝试过的代码。
#import "ImageBrowserView.h"
#import "ImageBrowserCell.h"
- (IKImageBrowserCell *) newCellForRepresentedItem:(id) cell
{
return [[ImageBrowserCell alloc] init];
}
细胞类
- (CALayer *) layerForType:(NSString*) type
{
CGColorRef color;
//retrieve some usefull rects
NSRect frame = [self frame];
NSRect imageFrame = [self imageFrame];
NSRect relativeImageFrame = NSMakeRect(imageFrame.origin.x - frame.origin.x, imageFrame.origin.y - frame.origin.y, imageFrame.size.width, imageFrame.size.height);
// place holder layer
if(type == IKImageBrowserCellPlaceHolderLayer){
//create a place holder layer
CALayer *layer = [CALayer layer];
layer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);
CALayer *placeHolderLayer = [CALayer layer];
placeHolderLayer.frame = *(CGRect*) &relativeImageFrame;
float fillComponents[4] = {1.0, 1.0, 1.0, 0.3};
float strokeComponents[4] = {1.0, 1.0, 1.0, 0.9};
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
//set a background color
color = CGColorCreate(colorSpace, fillComponents);
[placeHolderLayer setBackgroundColor:color];
CFRelease(color);
//set a stroke color
color = CGColorCreate(colorSpace, strokeComponents);
[placeHolderLayer setBorderColor:color];
CFRelease(color);
[placeHolderLayer setBorderWidth:2.0];
[placeHolderLayer setCornerRadius:10];
CFRelease(colorSpace);
[layer addSublayer:placeHolderLayer];
return layer;
}
return nil;
}
该单元类有方法返回 IKImageBrowserCell 的各种控件的框架,并且不允许添加为 subview 。 我没有找到分配 NSButton 的位置,以便我可以在项目上显示。 请帮我。我已经在这上面浪费了大约 1 天的时间。 任何帮助都是值得赞赏的。 谢谢
最佳答案
您正朝着正确的方向前进。您需要检查类型并将按钮添加到前景层。这是我现有项目中的一些代码。
- (CALayer *)layerForType:(NSString *)type
{
if (type == IKImageBrowserCellBackgroundLayer) {
CALayer *layer = [CALayer layer];
NSRect rect = [self frame];
layer.frame = rect;
_frameBg = rect;
CGFloat cellSize = rect.size.height;
SSLayerBackground *bgLayer = [SSLayerBackground layer];
[layer addSublayer:bgLayer];
[bgLayer setFrame:rect];
bgLayer.position = NSMakePoint(rect.size.width/2.0, rect.size.height/2.0);
[bgLayer setNeedsDisplay];
/* Create background layer here */
return layer;
} else if (type == IKImageBrowserCellForegroundLayer) {
CALayer *layer = [CALayer layer];
NSRect rect = [self frame];
layer.frame = rect;
CGFloat cellSize = rect.size.width;
/* Add your buttons to this layer */
return layer;
} else if (type == IKImageBrowserCellSelectionLayer) {
CALayer *layer = [CALayer layer];
NSRect rect = [self frame];
layer.frame = rect;
CGFloat cellSize = rect.size.height;
/* Do selection layer stuff here */
return layer;
}
//return nil;
return [super layerForType:type];
}
关于MACOSX - 如何自定义 IKImageBrowserView 以在每个项目上添加 NSButton?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18640000/