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🔧 Guard Method values in swizzle()

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This commit is contained in:
Arman Arutiunov 2020-11-04 15:24:59 +00:00
parent 5cb965ea10
commit 6101a95d39
1 changed files with 5 additions and 2 deletions
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7
SwiftLintXcode/SaveHook.swift
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@ -24,8 +24,11 @@ final class SaveHook {
if swizzled { return }
swizzled = true
let fromMethod = class_getInstanceMethod(NSDocument.self, #selector(NSDocument.save(withDelegate:didSave:contextInfo:)))
let toMethod = class_getInstanceMethod(NSDocument.self, #selector(NSDocument.swiftLintXcodeSaveDocument(delegate:didSaveSelector:contextInfo:)))
guard let fromMethod = class_getInstanceMethod(NSDocument.self, #selector(NSDocument.save(withDelegate:didSave:contextInfo:))),
let toMethod = class_getInstanceMethod(NSDocument.self, #selector(NSDocument.swiftLintXcodeSaveDocument(delegate:didSaveSelector:contextInfo:))) else {
return
}
method_exchangeImplementations(fromMethod, toMethod)
}