ios 如何手动弃用成员
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How to manually deprecate members
提问by Atomix
Unlike Objective-C, Swift has no preprocessor, so is there still a way to manually deprecate members of a class?
与 Objective-C 不同，Swift 没有预处理器，那么还有办法手动弃用类的成员吗？
I am looking for something similar to this:
我正在寻找类似的东西：
-(id)method __deprecated;
回答by Axel Guilmin
You can use the Available tag, for example :
您可以使用可用标签，例如：
@available(*, deprecated)
func myFunc() {
// ...
}
Where * is the platform (iOS, iOSApplicationExtension, macOS, watchOS, tvOS, * for all, etc.).
其中 * 是平台（iOS、iOSApplicationExtension、macOS、watchOS、tvOS、* for all 等）。
You can also specify the version of the platform from which it was introduced, deprecated, obsoleted, renamed, and a message:
您还可以指定的平台，它的版本introduced，deprecated，obsoleted，renamed，和message：
@available(iOS, deprecated:6.0)
func myFunc() {
// calling this function is deprecated on iOS6+
}
Or
@available(iOS, deprecated: 6.0, obsoleted: 7.0, message: "Because !")
func myFunc() {
// deprecated from iOS6, and obsoleted after iOS7, the message "Because !" is displayed in XCode warnings
}
If your project targets multiple platforms, you can use several tags like so :
如果您的项目面向多个平台，您可以使用多个标签，如下所示：
@available(tvOS, deprecated:9.0.1)
@available(iOS, deprecated:9.1)
@available(macOS, unavailable, message: "Unavailable on macOS")
func myFunc() {
// ...
}
More details in the Swift documentation.
Swift 文档中的更多详细信息。
回答by Yuchen Zhong
Starting Swift 3and Swift 4, the version number is optional. You can now simply type:
从Swift 3和Swift 4 开始，版本号是可选的。您现在可以简单地输入：
@available(*, deprecated)
func foo() {
// ...
}
Or if you want a message go along with it:
或者，如果您想要一条消息，请执行以下操作：
@available(*, deprecated, message: "no longer available ...")
func foo() {
// ...
}
回答by Skyborg
You can use this to auto-fix you entrys with your new func
您可以使用它来自动修复您的新功能条目
@available(*, deprecated, renamed: "myNewFunc")
func myOldFunc() {
// ...
}
func myNewFunc() {
// ...
}
Instead of * you can use swift , for the swift Version number.
您可以使用 swift 代替 * 来获取 swift 版本号。
Deprecated functions generate warnings but can still be called. (Warning)
不推荐使用的函数会生成警告，但仍然可以调用。（警告）
Obsolete functions stop it from being called entirely. (Error)
过时的函数阻止它被完全调用。（错误）
@available(swift, deprecated: 4.0, obsoleted: 4.2, message: "This will be removed in v4.2, please migrate to ...")
or use other Options like iOS, macOS, watchOS, tvOS ...
或使用其他选项，如 iOS、macOS、watchOS、tvOS ...
回答by yoAlex5
@available(iOS, deprecated:7.0, obsoleted: <ObsoletedVersion>, renamed: "myFuncNew", message: "Please use new method - myFuncNew()")
func myFuncOld() {
//
}
If deployment targetis 9.0and
如果deployment target是9.0并且
1.<ObsoletedVersion>== 10.0- warning
1. <ObsoletedVersion>== 10.0-warning
2.<ObsoletedVersion>== 8.0- compile error
2. <ObsoletedVersion>== 8.0-compile error
