Unable to PrintToPrinter in IOS15 #281
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What resolved the crash for me was to edit UIPrintInteractionController+APPPrinter.m and wrap the ctrl.printInfo assignment with a dispatch_async as shown below.
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Thank you Kloopler, I'll give that a try 👍 |
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That's a shame.. it didn't work for me |
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Hi @kloopler, would you be so kind as to share the code you have in the UIPrintInteractionController+APPPrinter.m file? |
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Hi @AlisterRWood were you able to sort this error? we´re having the same issue and haven't found a fix yet. |
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Sadly not... I tried wrapping nearly part of each function in a dispatch_async but never got it working. Let me know if you find anything that does work and I'll let you know if I do |
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Thanks @AlisterRWood we´ll let you know for sure. |
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Hi @legustav & @AlisterRWood, looks like this is a general problem in iOS15: https://developer.apple.com/forums/thread/689876 You need to update APPPrinter.m (l.259) like this to make it work again: dispatch_async(dispatch_get_main_queue(), ^{
// [ctrl printToPrinter:printer completionHandler:
// ^(UIPrintInteractionController *ctrl, BOOL ok, NSError *e) {
// [self rememberPrinter:(ok ? printer : NULL)];
// [self sendResultWithMessageAsBool:ok callbackId:callbackId];
// }];
[printer contactPrinter:^(BOOL available) {
if (available) {
[ctrl printToPrinter:printer completionHandler:
^(UIPrintInteractionController *ctrl, BOOL ok, NSError *e) {
[self rememberPrinter:(ok ? printer : NULL)];
[self sendResultWithMessageAsBool:ok callbackId:callbackId];
}];
} else {
NSLog(@"printer unavailable");
}
}];
}); |
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Thank you so much @Fauphi. That has got my app up and running again |
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Many thanks @Fauphi @kloopler & @AlisterRWood for all the help! |
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I am getting similar errors If I start a print I get this warning above. If I cancel and hit my print button again my app crashes and I get the following I'm going to keep trying some other things but this used to work just fine. The only thing that has changed I believe is iOS15 |
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Apologies for the late reply. My app began crashing again after I updated to iPadOS v15.4.1. I found a work around that is a bit of a hack but it stopped the crashing. Here it is below. Basically runs ` - (void) printContent:(NSString *)content |
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@jameshhood did you manage to resolve this issue? |
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* Fix : Unable to PrintToPrinter in IOS15 katzer#281 See katzer#281 (comment) * Fix : pick method returns null in IOS15 katzer#268 See katzer#268 * Fix : Unable to PrintToPrinter in AndroidX --------- Co-authored-by: IACHI Dimitri Fabien <[email protected]>
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Hi Katzer, thanks so much for creating this plugin.. it's been fantastic.
Sadly since IOS 15 came out the printToPrinter function now throws an error
'Application tried to present modally a view controller <UIAlertController: 0x7fd9c205f000> that is already being presented by <UIViewController: 0x7fd9c0c139f0>.'
It can print using the picker controller but we need the silent printing options as it's customer facing.
Any help with this would be greatly appreciated
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