首先明确：你不需要开启额外的特定后台模式——用scheduleBackgroundRefresh更新Complication是WatchKit扩展的原生能力，你当前开启的音频、定位等后台模式和这个场景完全无关，甚至可能让系统对扩展的资源管控更严格，建议只保留必要的权限。

你的崩溃核心原因是后台任务的生命周期管理错误，从崩溃日志来看，问题出在-[WKRefreshBackgroundTask dealloc]阶段，结合Swift的释放栈，大概率是这几个问题：

• 没有正确调用setTaskCompleted()结束后台任务，导致系统在释放任务对象时出现异常
• 闭包捕获了任务对象或当前对象导致循环引用/野指针，引发重复释放

具体修复步骤： #

1. 确保后台任务被正确标记完成

无论你的数据请求成功还是失败，都必须在任务处理完毕后调用setTaskCompleted()，告诉系统任务已经结束。示例代码：

func handle(_ backgroundTasks: Set<WKRefreshBackgroundTask>) {
    for task in backgroundTasks {
        switch task {
        case let refreshTask as WKApplicationRefreshBackgroundTask:
            // 执行你的数据获取和Complication更新逻辑
            updateContentInBackground { [weak self] success in
                // 一定要标记任务完成
                refreshTask.setTaskCompleted()
                // 可选：如果需要下一次刷新，重新调度
                self?.scheduleNextBackgroundRefresh()
            }
        default:
            // 其他类型的后台任务也要标记完成，避免系统报错
            task.setTaskCompleted()
        }
    }
}

2. 修复闭包的循环引用问题

从崩溃栈里的partial apply for closure #1 in ExtensionDelegate.updateContentInBackgorund(_:)可以看出，你的闭包捕获存在问题。要使用[weak self]避免循环引用，同时确保在闭包内安全访问self：

func updateContentInBackground(completion: @escaping (Bool) -> Void) {
    RequestManager.performRequestWithURL(yourURL) { [weak self] success, code, homeData, responseDict, error in
        guard let self = self else {
            completion(false)
            return
        }
        
        if let error = error {
            // 处理错误
            completion(false)
            return
        }
        
        // 更新Complication数据
        if let data = homeData {
            self.updateComplication(with: data)
        }
        
        completion(true)
    }
}

3. 不要长期持有后台任务对象

不要把WKRefreshBackgroundTask存储在全局变量、类属性中，处理完就调用setTaskCompleted()，让系统来管理它的生命周期，避免提前释放或重复释放的问题。

附带的崩溃日志： #

Thread 0 name: Thread 0 Crashed: 
0 libsystem_kernel.dylib 0x2054c564 __abort_with_payload + 8 
1 libsystem_kernel.dylib 0x20550d24 abort_with_payload_wrapper_internal + 100 (terminate_with_reason.c:102) 
2 libsystem_kernel.dylib 0x20550cc0 abort_with_reason + 28 (terminate_with_reason.c:116) 
3 WatchKit 0x332b916c -[WKRefreshBackgroundTask dealloc] + 536 (SPUtils.h:15) 
4 watchkitapp Extension 0x02f75710 outlined consume of Set<A>.Iterator._Variant<A> + 36 
5 libswiftCore.dylib 0x472552b8 _swift_release_dealloc + 28 (HeapObject.cpp:626) 
6 watchkitapp Extension 0x02f757a0 partial apply for closure #1 in ExtensionDelegate.updateContentInBackgorund(_:) + 448416 (ExtensionDelegate.swift:74) 
7 libswiftCore.dylib 0x472552b8 _swift_release_dealloc + 28 (HeapObject.cpp:626) 
8 watchkitapp Extension 0x02f757a0 partial apply for closure #1 in ExtensionDelegate.updateContentInBackgorund(_:) + 448416 (ExtensionDelegate.swift:74) 
9 watchkitapp Extension 0x02f75808 partial apply for thunk for @escaping @callee_guaranteed (@unowned Bool, @unowned Int?, @guaranteed DomainHome?, @guaranteed [String : Any]?, @guaranteed Error?) -> () + 448520 (<compiler-generated>:0) 
10 libswiftCore.dylib 0x472552b8 _swift_release_dealloc + 28 (HeapObject.cpp:626) 
11 watchkitapp Extension 0x02f757a0 partial apply for closure #1 in ExtensionDelegate.updateContentInBackgorund(_:) + 448416 (ExtensionDelegate.swift:74) 
12 watchkitapp Extension 0x02f7581c partial apply for thunk for @escaping @callee_guaranteed (@unowned Bool, @unowned Int?, @guaranteed DomainHome?, @guaranteed [String : Any]?, @guaranteed Error?) -> () + 448540 (<compiler-generated>:0) 
13 libswiftCore.dylib 0x472552b8 _swift_release_dealloc + 28 (HeapObject.cpp:626) 
14 watchkitapp Extension 0x02f60c24 partial apply for specialized closure #1 in RequestManager.performRequestWithURL<A>(_:method:payload:useAuthentication:credentials:handler:) + 363556 (<compiler-generated>:0) 
15 watchkitapp Extension 0x02f61b24 block_destroy_helper.85 + 16 
16 libswiftCore.dylib 0x472552b8 _swift_release_dealloc + 28 (HeapObject.cpp:626) 
17 libsystem_blocks.dylib 0x2042ea5c _Block_release + 140 (runtime.cpp:177) 
18 libdispatch.dylib 0x20394fc0 _dispatch_client_callout + 16 (object.m:495) 
19 libdispatch.dylib 0x203a0e7c _dispatch_main_queue_callback_4CF + 924 (inline_internal.h:2484) 
20 CoreFoundation 0x2093ddcc __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12 (CFRunLoop.c:1749) 
21 CoreFoundation 0x20938df4 __CFRunLoopRun + 1852 (CFRunLoop.c:3069) 
22 CoreFoundation 0x209383b0 CFRunLoopRunSpecific + 424 (CFRunLoop.c:3192) 
23 GraphicsServices 0x23ed8358 GSEventRunModal + 160 (GSEvent.c:2246) 
24 UIKitCore 0x3da4b87c UIApplicationMain + 1756 (UIApplication.m:4820) 
25 libxpc.dylib 0x20629bdc _xpc_objc_main.cold.3 + 208 
26 libxpc.dylib 0x20615c58 _xpc_objc_main + 212 (main.m:0) 
27 libxpc.dylib 0x2061823c xpc_main + 152 (init.c:1384) 
28 Foundation 0x213a1738 -[NSXPCListener resume] + 160 (NSXPCListener.m:276) 
29 PlugInKit 0x2a30c0a8 -[PKService run] + 396 (PKService.m:165) 
30 WatchKit 0x3329fe94 WKExtensionMain + 60 (main.m:19) 
31 WatchKit 0x3336d93c main + 12 (main.m:27) 
32 libdyld.dylib 0x203d0f48 start + 4

内容的提问来源于stack exchange，提问作者Shipra Gupta