QuickLook

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Create previews of files to use inside your app or perform simple edits on previews using QuickLook.

Posts under QuickLook tag

26 Posts

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Activity

Quick Look Extension does not load MapKit map properly anymore, after macOS Sequoia
It appears that starting with macOS Sequoia, Quick Look Preview extension no longer loads MapKit maps correctly anymore. Map tiles do not appear, leaving users with a beige background. Users report that polylines do render correctly, but annotations appears black. This was previously working fine in prior macOS versions including Sonoma. STEPS TO REPRODUCE Create a macOS app project, with an associated document. Ensure project has a Quick Look preview extension, with necessary basic setups. Ensure that the extension mentioned in (2) must have a MKMapView. Any other cosmetic changes, etc, does not need to be implemented to observe the base issue. Do note that it has been reported that in addition to the map tiles not loading, annotations don't render correctly as well.
5
2
1k
Feb ’26
Unusually long “Waiting for Review” times
Hi everyone, I’m currently experiencing unusually long review waiting times and wanted to ask if others see the same behavior this week. My situation: App Store update has been in “Waiting for Review” significantly longer than usual, my apps are pending from last 2 weeks. I’m not trying to escalate anything just looking to understand if this is currently affecting more developers. Would really appreciate hearing about your recent experiences.
1
0
74
Feb ’26
Quick Look Plugin for Mac and Internet Access
I'd like to create a Quick Look extension for a file type for which a location or region on a Map should be shown as preview. However the MapView would only show a grid without any map. From within the MapKit delegate I can see from the "Error" parameter (a server with this domain can not be found) that this seems to be a network issue. The Quick Look extension seems to have no access to the internet and therefore the MapView can not load any map data. I've then also done some other tests via URLSession, which also only fails with connection errors. I haven't seen any limitations or restrictions mentioned in the API documentation. Is this the expected behavior? Is this a bug? Or am I missing something?
4
0
311
Feb ’26
Active Quicklook extension is ignored
When you have multiple Apps on the Mac which all provide Quicklook extensions for the same file type, then I would assume that if I activate one of these Quicklook extensions in the system settings, this one would be used. But this doesn't seem to be the case. It looks like the macOS just looks the very first extension it can find for a certain file type, and if this Quicklook extension is switched off, the file can not be previewed anymore. The macOS just doesn't bother to look for the other existing quicklook extension for this file, even if this other is enabled. The only option right now to get this other extension to be used by the system would be to completely delete the first App, so its extension is deleted as well. Is this really the way how it is supposed to work? How can this be fixed? Can I tell my users something else than "just delete the other App"?
0
0
141
Mar ’26
Issues with diacritics in filename on iOS when the system main language is not English
Hi, I'm encountering a weird issue on iOS that happens: for files with diacritics in their name, like "Gòmez.pdf" or "Télé.mp4", when the iPhone or iPad main language is not set to English, if the file has been created with a relatively low-level Unix function like fopen() or copyfile(). Then, the file cannot be previsualized using QuickLook or opened using other apps. Most of the time it fails silently, but on some occasions I get the following error message: "You do not have permission to save the file "filename.pdf" in the folder "myFolder"". The issue is present in, at least, iOS 16 and 26. It seems worse in iOS 26. It seems that all three conditions are required, I don't see the issue when the iPhone or iPad is set to use English as the main language. I also don't see the issue if I rename the files in the Files app. I'm probably doing something wrong, but what can it be? (it's kind of weird that my recommendation for users becomes: if you want to use international characters in your file names, you need to set the iPad language to English...)
5
0
289
3w
Quick Look Extension does not load MapKit map properly anymore, after macOS Sequoia
It appears that starting with macOS Sequoia, Quick Look Preview extension no longer loads MapKit maps correctly anymore. Map tiles do not appear, leaving users with a beige background. Users report that polylines do render correctly, but annotations appears black. This was previously working fine in prior macOS versions including Sonoma. STEPS TO REPRODUCE Create a macOS app project, with an associated document. Ensure project has a Quick Look preview extension, with necessary basic setups. Ensure that the extension mentioned in (2) must have a MKMapView. Any other cosmetic changes, etc, does not need to be implemented to observe the base issue. Do note that it has been reported that in addition to the map tiles not loading, annotations don't render correctly as well.
Replies
5
Boosts
2
Views
1k
Activity
Feb ’26
Unusually long “Waiting for Review” times
Hi everyone, I’m currently experiencing unusually long review waiting times and wanted to ask if others see the same behavior this week. My situation: App Store update has been in “Waiting for Review” significantly longer than usual, my apps are pending from last 2 weeks. I’m not trying to escalate anything just looking to understand if this is currently affecting more developers. Would really appreciate hearing about your recent experiences.
Replies
1
Boosts
0
Views
74
Activity
Feb ’26
Quick Look Plugin for Mac and Internet Access
I'd like to create a Quick Look extension for a file type for which a location or region on a Map should be shown as preview. However the MapView would only show a grid without any map. From within the MapKit delegate I can see from the "Error" parameter (a server with this domain can not be found) that this seems to be a network issue. The Quick Look extension seems to have no access to the internet and therefore the MapView can not load any map data. I've then also done some other tests via URLSession, which also only fails with connection errors. I haven't seen any limitations or restrictions mentioned in the API documentation. Is this the expected behavior? Is this a bug? Or am I missing something?
Replies
4
Boosts
0
Views
311
Activity
Feb ’26
Active Quicklook extension is ignored
When you have multiple Apps on the Mac which all provide Quicklook extensions for the same file type, then I would assume that if I activate one of these Quicklook extensions in the system settings, this one would be used. But this doesn't seem to be the case. It looks like the macOS just looks the very first extension it can find for a certain file type, and if this Quicklook extension is switched off, the file can not be previewed anymore. The macOS just doesn't bother to look for the other existing quicklook extension for this file, even if this other is enabled. The only option right now to get this other extension to be used by the system would be to completely delete the first App, so its extension is deleted as well. Is this really the way how it is supposed to work? How can this be fixed? Can I tell my users something else than "just delete the other App"?
Replies
0
Boosts
0
Views
141
Activity
Mar ’26
Issues with diacritics in filename on iOS when the system main language is not English
Hi, I'm encountering a weird issue on iOS that happens: for files with diacritics in their name, like "Gòmez.pdf" or "Télé.mp4", when the iPhone or iPad main language is not set to English, if the file has been created with a relatively low-level Unix function like fopen() or copyfile(). Then, the file cannot be previsualized using QuickLook or opened using other apps. Most of the time it fails silently, but on some occasions I get the following error message: "You do not have permission to save the file "filename.pdf" in the folder "myFolder"". The issue is present in, at least, iOS 16 and 26. It seems worse in iOS 26. It seems that all three conditions are required, I don't see the issue when the iPhone or iPad is set to use English as the main language. I also don't see the issue if I rename the files in the Files app. I'm probably doing something wrong, but what can it be? (it's kind of weird that my recommendation for users becomes: if you want to use international characters in your file names, you need to set the iPad language to English...)
Replies
5
Boosts
0
Views
289
Activity
3w
QLThumbnailGenerator macOS 26.4 No Longer Honors Users 'Folder Color' Preference When Making Icons for Folders
I use QLThumbnailGenerator to generate icons. After updating to macOS Tahoe 26.4 the folder color preference of the user is no longer respected. It just makes the icon default 'light blue.'
Replies
6
Boosts
0
Views
132
Activity
1w