我正在与并发症问题作斗争。内存有时会开始快速增长，并在 3-5 秒内达到 15 MB 限制。应用程序崩溃并出现错误：
线程 1：EXC_RESOURCE（RESOURCE_TYPE_MEMORY：超出高水位线内存限制）（限制=15 MB）
堆栈跟踪：
Thread 1 Queue : com.apple.main-thread (serial)
#0 0x507c8864 in lzfseDecode ()
#1 0x507c788c in lzfse_decode_buffer ()
#2 0x507c645c in compression_decode_buffer ()
#3 0x52200ff0 in Deepmap2DecodeDefault ()
#4 0x5221d184 in DecodeTiledImage ()
#5 0x521ea5a4 in vImageDeepmap2Decode ()
#6 0x41ea601c in __CUIUncompressDeepmap2ImageData_block_invoke ()
#7 0x41ea074c in CUIUncompressDeepmap2ImageData ()
#8 0x41ea4548 in -[_CSIRenditionBlockData expandCSIBitmapData:fromSlice:makeReadOnly:] ()
#9 0x41ea1d48 in __csiCompressImageProviderCopyImageBlockSetWithOptions ()
#10 0x2d7cdcd8 in IIOImagePixelDataProvider::getBytesImageProvider(void*, unsigned long) ()
#11 0x2d7dac6c in PNGWritePlugin::writePNG(IIOImagePixelDataProvider*, IIODictionary*) ()
#12 0x2d7e1d64 in PNGWritePlugin::writeAll() ()
#13 0x2d7da558 in PNGWritePlugin::WriteProc(void*, void*, void*, void*) ()
#14 0x2d7cd044 in IIOImageDestination::finalizeDestination() ()
#15 0x2d807770 in CGImageDestinationFinalize ()
#16 0x244cd564 in ___lldb_unnamed_symbol212136 ()
#17 0x244cd0ec in ___lldb_unnamed_symbol212135 ()
#18 0x244cebfc in ___lldb_unnamed_symbol212193 ()
#19 0x2402f64c in ___lldb_unnamed_symbol166857 ()
#20 0x2402c180 in ___lldb_unnamed_symbol166740 ()
#21 0x2402cdec in ___lldb_unnamed_symbol166744 ()
#22 0x2402ca94 in ___lldb_unnamed_symbol166742 ()
#23 0x244cc404 in ___lldb_unnamed_symbol212112 ()
#24 0x244cce08 in ___lldb_unnamed_symbol212134 ()
#25 0x23b3f110 in ___lldb_unnamed_symbol123404 ()
#26 0x241fed00 in ___lldb_unnamed_symbol183123 ()
#27 0x241fce70 in ___lldb_unnamed_symbol183102 ()
#28 0x241fcf54 in ___lldb_unnamed_symbol183102 ()
#29 0x241fcf54 in ___lldb_unnamed_symbol183102 ()
#30 0x241fcf54 in ___lldb_unnamed_symbol183102 ()
#31 0x241fcf54 in ___lldb_unnamed_symbol183102 ()
#32 0x23c0e600 in ___lldb_unnamed_symbol130598 ()
#33 0x23c10a20 in ___lldb_unnamed_symbol130761 ()
#34 0x242f05e4 in ___lldb_unnamed_symbol193041 ()
#35 0x23c0dbf0 in ___lldb_unnamed_symbol130593 ()
#36 0x23c0e888 in ___lldb_unnamed_symbol130605 ()
#37 0x23c0e7ac in ___lldb_unnamed_symbol130604 ()
#38 0x23c0e9e8 in ___lldb_unnamed_symbol130607 ()
#39 0x27b5dc48 in ___lldb_unnamed_symbol5926 ()
#40 0x27ae5124 in ___lldb_unnamed_symbol2483 ()
#41 0x27ae4558 in ___lldb_unnamed_symbol2482 ()
#42 0x27b9f844 in ___lldb_unnamed_symbol7756 ()
#43 0x26214138 in _dispatch_call_block_and_release ()
#44 0x262159ac in _dispatch_client_callout ()
#45 0x2622246c in _dispatch_main_queue_drain ()
#46 0x262220c4 in _dispatch_main_queue_callback_4CF ()
#47 0x1d0aede4 in __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ ()
#48 0x1d08274c in __CFRunLoopRun ()
#49 0x1d0c76bc in CFRunLoopRunSpecific ()
#50 0x1baf5d78 in -[NSRunLoop(NSRunLoop) runMode:beforeDate:] ()
#51 0x1bb2ec14 in -[NSRunLoop(NSRunLoop) run] ()
#52 0x50520c3c in _xpc_objc_main ()
#53 0x50522d64 in _xpc_main ()
#54 0x50522f24 in xpc_main ()
#55 0x1bb66208 in -[NSXPCListener resume] ()
#56 0x3351142c in -[_EXRunningExtension resume] ()
#57 0x335112dc in -[_EXRunningExtension startWithArguments:count:] ()
#58 0x3352e52c in EXExtensionMain ()
#59 0x1c2644b8 in NSExtensionMain ()
#60 0x4e69167c in start ()
替代堆栈跟踪（很少出现）：
#0 0x4f0c6014 in _platform_memmove ()
#1 0x4f21e6c0 in ___lldb_unnamed_symbol110 ()
#2 0x4f21ddd4 in ___lldb_unnamed_symbol105 ()
#3 0x4f21bc14 in ___lldb_unnamed_symbol102 ()
#4 0x4f21b390 in deflate ()
#5 0x2c34be8c in png_compress_IDAT ()
#6 0x2c34c3ec in png_write_find_filter ()
#7 0x2c431d58 in _cg_png_write_row_sized ()
#8 0x2c34ae5c in PNGWritePlugin::writePNG(IIOImagePixelDataProvider*, IIODictionary*) ()
#9 0x2c351d64 in PNGWritePlugin::writeAll() ()
#10 0x2c34a558 in PNGWritePlugin::WriteProc(void*, void*, void*, void*) ()
#11 0x2c33d044 in IIOImageDestination::finalizeDestination() ()
#12 0x2c377770 in CGImageDestinationFinalize ()
#13 0x2303d564 in ___lldb_unnamed_symbol212136 ()
#14 0x2303d0ec in ___lldb_unnamed_symbol212135 ()
#15 0x2303ebfc in ___lldb_unnamed_symbol212193 ()
#16 0x22b9f64c in ___lldb_unnamed_symbol166857 ()
#17 0x22b9c180 in ___lldb_unnamed_symbol166740 ()
#18 0x22b9cdec in ___lldb_unnamed_symbol166744 ()
#19 0x22b9ca94 in ___lldb_unnamed_symbol166742 ()
#20 0x2303c404 in ___lldb_unnamed_symbol212112 ()
#21 0x2303ce08 in ___lldb_unnamed_symbol212134 ()
#22 0x226af110 in ___lldb_unnamed_symbol123404 ()
#23 0x22d6ed00 in ___lldb_unnamed_symbol183123 ()
#24 0x22d6ce70 in ___lldb_unnamed_symbol183102 ()
#25 0x22d6cf54 in ___lldb_unnamed_symbol183102 ()
#26 0x22d6cf54 in ___lldb_unnamed_symbol183102 ()
#27 0x22d6cf54 in ___lldb_unnamed_symbol183102 ()
#28 0x22d6cf54 in ___lldb_unnamed_symbol183102 ()
#29 0x2277e600 in ___lldb_unnamed_symbol130598 ()
#30 0x22780a20 in ___lldb_unnamed_symbol130761 ()
#31 0x22e605e4 in ___lldb_unnamed_symbol193041 ()
#32 0x2277dbf0 in ___lldb_unnamed_symbol130593 ()
#33 0x2277e888 in ___lldb_unnamed_symbol130605 ()
#34 0x2277e7ac in ___lldb_unnamed_symbol130604 ()
#35 0x2277e9e8 in ___lldb_unnamed_symbol130607 ()
#36 0x266cdc48 in ___lldb_unnamed_symbol5926 ()
#37 0x26655124 in ___lldb_unnamed_symbol2483 ()
#38 0x26654558 in ___lldb_unnamed_symbol2482 ()
#39 0x2670f844 in ___lldb_unnamed_symbol7756 ()
#40 0x24d84138 in _dispatch_call_block_and_release ()
#41 0x24d859ac in _dispatch_client_callout ()
#42 0x24d9246c in _dispatch_main_queue_drain ()
#43 0x24d920c4 in _dispatch_main_queue_callback_4CF ()
#44 0x1bc1ede4 in __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ ()
#45 0x1bbf274c in __CFRunLoopRun ()
#46 0x1bc376bc in CFRunLoopRunSpecific ()
#47 0x1a665d78 in -[NSRunLoop(NSRunLoop) runMode:beforeDate:] ()
#48 0x1a69ec14 in -[NSRunLoop(NSRunLoop) run] ()
#49 0x4f090c3c in _xpc_objc_main ()
#50 0x4f092d64 in _xpc_main ()
#51 0x4f092f24 in xpc_main ()
#52 0x1a6d6208 in -[NSXPCListener resume] ()
#53 0x3208142c in -[_EXRunningExtension resume] ()
#54 0x320812dc in -[_EXRunningExtension startWithArguments:count:] ()
#55 0x3209e52c in EXExtensionMain ()
#56 0x1add44b8 in NSExtensionMain ()
#57 0x4d20167c in start ()
我尝试了什么。
首先我注意到崩溃与 PNG 相关。我注释掉了复杂功能中的所有图像，并将其替换为
Rectangle()我尝试分析该应用程序。 Instruments 与 Apple Watch 配合使用效果不佳。通常，应用程序中的不同复杂功能需要 1.5-6.5 MB。但随后 Instruments 抱怨设备已断开连接。我始终无法检查扩展是否存在内存泄漏。
需要注意的是，该错误仅发生在 Apple Watch 设备上，而不会发生在模拟器中。在两台设备上复制：
并发症是用 SwiftUI 和 WidgetKit 编写的。
看起来您正在尝试将相当多的内存大项目加载到手表中。
需要注意的是，该错误仅发生在 Apple Watch 设备上，而不会出现在模拟器中 - 发生这种情况是因为模拟器正在使用 MacBook 的 RAM 并且可以承受繁重的数据加载，而 Apple Watch 应用程序沙箱则受到更多限制。
您可能也使用
Rectangle()我的建议是不要尝试立即加载所有内容，而是在模型中实现分页。
加载前 5 个项目，然后根据需要（例如，在用户滚动时）加载 5 个项目，等等。
如果您使用 SwiftUI，请确保您没有在视图内加载
onAppear {}