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MacOS 11.3.1 (20E241) Xcode Version 12.5 (12E262) objc // Test URL https://dwarf.sogoucdn.com/trans/durl/31-193475685vgiwgIi7?action=d&ow_name=testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest.zip I opened this URL in Safari and Chrome, and I found that Chrome displayed the correct name "testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest.zip", while the file name downloaded by Safari displayed "31-193475685vgiwgIi7". I captured the WKNavigationResponse object in the delegate of WKWebView and found that the "Content-Disposition" was incomplete. I tried other URL addresses. If the filename in "Content-Disposition" is very long, this bug will appear. objc (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {     if ([navigationResponse.response isKindOfClass:[NSHTTPURLResponse class]])    {         NSHTTPURLResponse *response = (NSHTTPURLResponse*)navigationResponse.response;         NSString *contentDisposition = [response.allHeaderFields valueForKey:@"Content-Disposition"]; NSLog(@"%@",contentDisposition); } } /* "Content-Disposition" =     (         "attachment; filename=\"testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest"     );/ If I use NSURLSessionDataTask to request, I can get the complete "Content-Disposition" objc "Content-Disposition" =     (         "attachment; filename=\"testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest.zip\"; filename*=UTF-8''testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest.zip"     ); This question is very important because I embed WKWebView in my app and use it to support file downloading. WKWebView does not seem to support downloading files, but I need to complete its downloading ability. This problem seems to exist on iOS too I want to know how I can solve this problem

This is my device: iMac 3.1 GHz 6-core Intel Core i5 APPLE SSD SM0512L iPhone X I have a folder with many pictures (50kb~500kb/each), and it takes a long time to read a picture from this folder. objc NSURL *filePath = ... NSData *data = [NSData dataWithContentsOfURL:filePath]; How many files are usually recommended to store in a folder?

Date/Time: 2021-01-21 16:07:47.001 +0800 End time: 2021-01-21 16:09:59.920 +0800 OS Version: macOS 11.1 (Build 20C69) Architecture: x8664h Report Version: 32 Incident Identifier: A722D768-2604-4038-B304-CC700C0B43F9 Share With Devs: Yes Data Source: Microstackshots Shared Cache: 467A83CB-BA86-3F07-B652-B9256C74080A slid base address 0x7fff20011000, slide 0x11000 Command: Xcode Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 12.3 (17715) Build Version: 8 Product Build Version: 12C33 Project Name: IDEFrameworks Source Version: 17715000000000000 App Item ID: 497799835 App External ID: 839512638 Parent: launchd [1] PID: 4237 Event: cpu usage Action taken: none CPU: 90 seconds cpu time over 133 seconds (68% cpu average), exceeding limit of 50% cpu over 180 seconds CPU limit: 90s Limit duration: 180s CPU used: 90s CPU duration: 133s Duration: 132.92s Duration Sampled: 132.59s Steps: 150 Hardware model: iMac19,1 Active cpus: 6 Fan speed: 1199 rpm Heaviest stack for the target process: 52 start + 1 (libdyld.dylib + 87585) [0x7fff2033c621] 52 NSApplicationMain + 816 (AppKit + 15858) [0x7fff22bf9df2] 52 -[NSApplication run] + 586 (AppKit + 195338) [0x7fff22c25b0a] 52 -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 421 (DVTKit + 89351) [0x10f11ed07] 52 -[NSApplication(NSEvent) nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1366 (AppKit + 251311) [0x7fff22c335af] 52 DPSNextEvent + 883 (AppKit + 257513) [0x7fff22c34de9] 52 BlockUntilNextEventMatchingListInModeWithFilter + 64 (HIToolbox + 201199) [0x7fff2869c1ef] 50 ReceiveNextEventCommon + 709 (HIToolbox + 201932) [0x7fff2869c4cc] 49 RunCurrentEventLoopInMode + 292 (HIToolbox + 202448) [0x7fff2869c6d0] 49 CFRunLoopRunSpecific + 563 (CoreFoundation + 521934) [0x7fff204176ce] 46 _CFRunLoopRun + 2008 (CoreFoundation + 525695) [0x7fff2041857f] 46 CFRunLoopDoTimers + 307 (CoreFoundation + 630594) [0x7fff20431f42] 46 CFRunLoopDoTimer + 922 (CoreFoundation + 631784) [0x7fff204323e8] 46 CFRUNLOOPISCALLINGOUTTOATIMERCALLBACKFUNCTION + 20 (CoreFoundation + 633101) [0x7fff2043290d] 43 NSFireDelayedPerform + 415 (Foundation + 527067) [0x7fff211c5adb] 40 -[DVTTimeSlicedMainThreadActiveWorkQueues processWorkQueuesOnDeadline] + 101 (DVTFoundation + 1932051) [0x10e9b1b13] 40 -[DVTTimeSlicedMainThreadWorkQueue processWithDeadline:] + 167 (DVTFoundation + 1940270) [0x10e9b3b2e] 40 -[DVTTimeSlicedMainThreadOrderedUniquingWorkQueue processWorkItemsWithDeadline:] + 133 (DVTFoundation + 1944953) [0x10e9b4d79] 40 _56-[IDEBuildIssueProvider initWithIssueManager:extension:]blockinvoke + 24 (IDEFoundation + 207834) [0x10f42cbda] 40 -[IDEBuildIssueProvider postBuildIssueChange:] + 873 (IDEFoundation + 225349) [0x10f431045] 40 -[IDEIssueProvider addIssues:forProviderContext:providerSession:container:blueprint:] + 117 (IDEFoundation + 911560) [0x10f4d88c8] 40 -[IDEIssueProvider addIssues:forProviderContext:providerSession:container:blueprint:runtimeGroupingObject:] + 245 (IDEFoundation + 911856) [0x10f4d89f0] 40 -[IDEIssueManager addIssues:forProviderContext:container:blueprint:runtimeGroupingObject:session:tryToCoalesce:] + 929 (IDEFoundation + 349066) [0x10f44f38a] 40 -[IDEIssueManager similarExistingIssueForIssue:container:blueprint:] + 595 (IDEFoundation + 333039) [0x10f44b4ef] 19 -[IDEIssueManager doesIssue:fromContainer:andBlueprint:coalesceWithIssue:] + 314 (IDEFoundation + 332388) [0x10f44b264] 7 -[IDEIssueManager doesIssue:coalesceWithIssue:] + 310 (IDEFoundation + 330520) [0x10f44ab18] 7 -[NSString compare:options:range:] + 34 (Foundation + 20848) [0x7fff2114a170] 2 CFStringCompareWithOptionsAndLocale + 3848 (CoreFoundation + 105140) [0x7fff203b1ab4]

The widget extension is embedded in my objc project, the preview is very slow, and the CPU over 100%

When my program is running, all windows suddenly lose focus and cannot be activated again. I check the activity monitor and show that my program cpu is 100%. All user interactions are unresponsive, but my program is still alive, and the main thread (UI) is still working normally. Log - https://developer.apple.com/forums/content/attachment/fad0d285-6f38-469c-aadb-dcb02e7d8e4c

I updated to Xcode 10 about 1 year ago. When I run the project, Xcode is not smooth. I found that my Xcode cpu occupies 100%, and it will not be smooth for about 1 minute. I have to kill Xcode to ensure that my app can run. If I do this, I can't debug the app. After many attempts, I found that I was using the New build system, and when I switched to the Legacy build system, it went smoothly. Until recently when I upgraded to Xcode 12, I found that the Legacy build system was marked as deprecated. I don't know how I can improve my project in the future. If you use the New build system to debug the project, it is almost impossible for developers to use. 

It was successful before Beta 9 was upgraded Can I successfully notarize the app without changing my computer? software macOS Big Sur 11 beta 9 (20A5384c) Xcode Version 12.0.1 (12A7300) crash process Xcode menu->window->Organizer->Distribute App->Developer ID->Upload->Select certificate and Developer ID profiles->next->crash crash log xcode_log.crash - https://developer.apple.com/forums/content/attachment/743d8204-ceb8-49e0-9f0e-0351316f3061

I use the ipsec protocol to connect to the VPN successfully in iOS14, and no network can be accessed. There is no such problem in iOS13. If you turn on the VPN in the system settings, it can be used normally, but when connected through NEVPNManager in my app, 90% of the cases are Not available