获取垃圾桶的全尺寸图标

发布于 2024-11-13 05:52:46 字数 81 浏览 1 评论 0原文

我正在尝试在我的应用程序中显示垃圾箱的图标，包括空的和满的。我尝试了多种方法来获取图标，但每次的大小都是 32x32。您知道获得全尺寸图像的方法吗？

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硪扪都還晓 2024-11-20 05:52:46

我假设您通过 NSWorkspace 获取垃圾桶图标，使用 IconsCore.h 中的 kTrashIcon 常量（如果不是，则为：

NSImage* image = [[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kTrashIcon)];

…这个 NSImage 包含多种不同尺寸的表示形式。如果您想要最大的，只需迭代可用的表示即可找到它：

NSEnumerator* representationEnumerator = [[image representations] objectEnumerator];
NSSize biggestSize = NSMakeSize(0, 0);
NSSize size;
while ((size = [(NSImageRep*)[representationEnumerator nextObject] size]).width) {
    if (size.width > biggestSize.width) {
        biggestSize = size;
    }
}
[image setSize:biggestSize];

…在我的计算机上，这会导致 NSImage 设置为 512x512。

I assume that you’re getting the trash icon through NSWorkspace, using the kTrashIcon constant from IconsCore.h (if you’re not, this is :

NSImage* image = [[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kTrashIcon)];

…this NSImage contains representations in a number of different sizes. If you want the biggest one, just iterate through the available representations to find it:

NSEnumerator* representationEnumerator = [[image representations] objectEnumerator];
NSSize biggestSize = NSMakeSize(0, 0);
NSSize size;
while ((size = [(NSImageRep*)[representationEnumerator nextObject] size]).width) {
    if (size.width > biggestSize.width) {
        biggestSize = size;
    }
}
[image setSize:biggestSize];

…On my computer, this results in an NSImage set to 512x512.

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很糊涂小朋友 2024-11-20 05:52:46

如果您要从以下文件创建图像，请注意 32px x 32px 只是默认尺寸

/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/TrashIcon.icns

：将其调整为您想要的大小：

NSString *path = @"/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/TrashIcon.icns";
NSImage *image = [[[NSImage alloc] initWithContentsOfFile:path] autorelease];
[image setSize:NSMakeSize(512.0, 512.0)];

当您这样做时，NSImage 将自动从可用的图像代表中选择适当的图像代表。例如，记录图像会显示以下描述：

image == NSImage 0x102e16bc0 Size={512, 512} Reps=(

    "NSBitmapImageRep 0x102e1f650 Size={512, 512} ColorSpace=(not yet loaded)
      BPS=8 BPP=(not yet loaded) Pixels=512x512 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e24c80 Size={256, 256} ColorSpace=(not yet loaded)
     BPS=8 BPP=(not yet loaded) Pixels=256x256 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e25540 Size={128, 128} ColorSpace=(not yet loaded)
    BPS=8 BPP=(not yet loaded) Pixels=128x128 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e25e30 Size={32, 32} ColorSpace=(not yet loaded)
    BPS=8 BPP=(not yet loaded) Pixels=32x32 Alpha=YES Planar=NO 
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e26720 Size={16, 16} ColorSpace=(not yet loaded)
    BPS=8 BPP=(not yet loaded) Pixels=16x16 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0"
)

大多数代表文件图标的图像（例如 NSWorkspace 返回的图像）将有多种可用尺寸，但默认尺寸为 32 x 32。

If you're creating an image from the following file, then realize that 32px x 32px is simply the default size:

/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/TrashIcon.icns

Just resize it to the size you'd like:

NSString *path = @"/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/TrashIcon.icns";
NSImage *image = [[[NSImage alloc] initWithContentsOfFile:path] autorelease];
[image setSize:NSMakeSize(512.0, 512.0)];

When you do so, the NSImage will automatically choose the appropriate image rep from those that are available. For example, logging the image shows the following description:

image == NSImage 0x102e16bc0 Size={512, 512} Reps=(

    "NSBitmapImageRep 0x102e1f650 Size={512, 512} ColorSpace=(not yet loaded)
      BPS=8 BPP=(not yet loaded) Pixels=512x512 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e24c80 Size={256, 256} ColorSpace=(not yet loaded)
     BPS=8 BPP=(not yet loaded) Pixels=256x256 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e25540 Size={128, 128} ColorSpace=(not yet loaded)
    BPS=8 BPP=(not yet loaded) Pixels=128x128 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e25e30 Size={32, 32} ColorSpace=(not yet loaded)
    BPS=8 BPP=(not yet loaded) Pixels=32x32 Alpha=YES Planar=NO 
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0",

    "NSBitmapImageRep 0x102e26720 Size={16, 16} ColorSpace=(not yet loaded)
    BPS=8 BPP=(not yet loaded) Pixels=16x16 Alpha=YES Planar=NO
  Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x102e187d0"
)

Most images that represent file icons such as those returned by NSWorkspace will have many sizes available, though 32 x 32 is the default size.

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