UIDocument的`save(to:for:completionHandler:)`崩溃 [英] `save(to:for:completionHandler:)` of `UIDocument` crashes

问题描述

在save(to:for:completionHandler:)上运行iOS 9的每32位设备/模拟器上，我都会崩溃.

I get crash on every 32 bit device / simulator running iOS 9 on save(to:for:completionHandler:).

Xcode 8.2.基本SDK是10.2.目标是9.0.标准架构. Swift3.用于开发和发布版本. 示例项目.

Xcode 8.2. Base SDK is 10.2. Target is 9.0. Standard architectures. Swift 3. For both develop and release builds. Sample project.

找不到，也没有任何相关问题.您能推荐任何解决方法吗?我需要64位体系结构吗?

Could not find if it's known, neither any related issues. Can you recommend any workaround? Should I require 64 bit architecture?

推荐答案

解决方法是返回NS对象，Apple工程师特别推荐NSMutableData:

The work around is to return NS object, Apple engineer recommended NSMutableData specifically:

override func contents(forType typeName: String) throws -> Any {  
    guard let data = text.data(using: .utf8) else { ... }
    if #available(iOS 10, *) {
        return data
    } else {
        return NSMutableData(data: data)
    }
}

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