[英]What's the definition of Font Asset in the Asset Catalog?
Starting from iOS 13, CTFontManager
has the following function:从iOS 13开始,
CTFontManager
有如下function:
@discussion Font assets are extracted from the asset catalog and registered. This call must be made after the completion handler of either NSBundleResourceRequest beginAccessingResourcesWithCompletionHandler: or conditionallyBeginAccessingResourcesWithCompletionHandler: is called successfully.
Name the assets using Postscript names for individual faces, or family names for variable/collection fonts. The same names can be used to unregister the fonts with CTFontManagerUnregisterFontDescriptors. In iOS, fonts registered with the persistent scope are not automatically available to other processes. Other process may call CTFontManagerRequestFonts to get access to these fonts.
@param fontAssetNames
Array of font name assets in asset catalog.
...
CTFontManagerRegisterFontsWithAssetNames(_ fontAssetNames: CFArray, _ bundle: CFBundle?, _ scope: CTFontManagerScope, _ enabled: Bool, _ registrationHandler: ((CFArray, Bool) -> Bool)?)
However, Asset Catalog does not have any way to add "Font Assets".但是,资产目录没有任何方法可以添加“字体资产”。
What I've tried:我试过的:
KanitRegular.ttf
(PostScript name is Kanit-Regular
) here .KanitRegular.ttf
(PostScript 名称是Kanit-Regular
)。Kanit-Regular
in the asset catalog.Kanit-Regular
的数据资产。Kanit-Regular.ttf
and put it into the data asset.Kanit-Regular.ttf
并将其放入数据资产中。 Data Asset's Contents.json
now looks like this:数据资产的
Contents.json
现在看起来像这样:
{
"data" : [
{
"filename" : "Kanit-Regular.ttf",
"idiom": "universal",
"universal-type-identifier" : "public.truetype-ttf-font"
}
],
"info" : {
"author" : "xcode",
"version" : 1
}
}
CTFontManager
CTFontManager
加载此字体like this:像这样:
func registerFont() {
var cfBundle: CFBundle?
if let bundle = Bundle(for: type(of: self)) {
cfBundle = CFBundleCreate(kCFAllocatorDefault, bundle.bundleURL as CFURL)
}
CTFontManagerRegisterFontsWithAssetNames(["Kanit-Regular"] as CFArray, cfBundle, .persistent, true) { (errors, done) -> Bool in
print(errors)
return done
}
}
After this, getting errors
printed:在此之后,打印
errors
:
▿ 1 element
- 0 : Error Domain=NSPOSIXErrorDomain Code=22 "Invalid argument" UserInfo={CTFontManagerErrorFontAssetNameKey=(
"Kanit-Regular"
)}
Is there any way to make it work?有什么办法让它工作吗?
Got it working by making the following:通过执行以下操作使其工作:
Kanit-Regular
data asset with fonts
On-Demand Resource Tag (tag name can be the name of your preference, fonts
is just the example).fonts
按需资源标签标记Kanit-Regular
数据资产(标签名称可以是您的偏好名称, fonts
只是示例)。fonts
tag into Initial Install Tags
Prefetched Resource Tags sectionfonts
标签放入Initial Install Tags
Prefetched Resource Tags 部分Fonts
Capability in Signing & Capabilities
and tick all boxes in itSigning & Capabilities
中添加Fonts
Capability 并勾选其中的所有框like this:像这样:
func registerFont() {
var cfBundle: CFBundle?
var resourceRequest: NSBundleResourceRequest?
if let bundle = Bundle(for: type(of: self)) {
resourceRequest = NSBundleResourceRequest(tags: Set(arrayLiteral: "fonts"), bundle: bundle)
cfBundle = CFBundleCreate(kCFAllocatorDefault, bundle.bundleURL as CFURL)
}
resourceRequest?.beginAccessingResources() { error in
if let error = error {
print(error)
} else {
CTFontManagerRegisterFontsWithAssetNames(["Kanit-Regular"] as CFArray, cfBundle, .persistent, true) { (errors, done) -> Bool in
print(errors)
return done
}
}
}
}
Outcome结果
When scope is passed as .persistent
or .user
, on initial call of CTFontManagerRegisterFontsWithAssetNames
function the user will be asked to install fonts into the system, which is not what I really need.当scope被以
.persistent
或.user
的方式传递,以CTFONTMANAGERREGISTER CTFontManagerRegisterFontsWithAssetNames
0140年8月8日。 In case the scope is .process
or .none
, the same errors
output is returned as provided at the end of the question.如果 scope 是
.process
或.none
,则返回问题末尾提供的相同errors
output 。
Although this function does not fit my needs, I at least validated that it is working.虽然这个 function 不符合我的需要,但我至少验证了它正在工作。 Maybe someone will find it useful.
也许有人会发现它很有用。
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