I cannot define my application defined type files like .AAA and .BBB and I can air drop multiple .AAA files or multiple .BBB files to my iPhone and use my application to received these files. but if I mix .AAA and .BBB files and air drop them to my phone. My phone always prompts " cannot receive all these items at once. So, how to receive a mix of my application defined type files through air drop? thanks

I installed Xcode 14, and cannot debug my iPhone with iOS 15.5, the error says, these two are not compatible. in the developer website, it says, Xcode 14 can debug up to iOS 16. why is this discrepancy. thanks a lot ! the Xcode website says Xcode 14 supports iOS16 SDK Xcode VersionMinimum OS RequiredSDKArchitectureDeployment TargetsSimulatorSwiftXcode 14macOS Monterey 12.4iOS 16

Anyone knows what's going on with Xcode 13.1? after upgrading to Xcode 13.1, it runs extremely slow, especially when I type code, roughly 5 times slower, I need to type and wait for the letters to pop up one by one (literally one by one popping). BTW, performance of compiling doesn't drop much, only the performance of editing drops, that is why this is especially unacceptable . My OS is Big Sur which has been upgraded for a while. and my Mac is pretty new (5 month? ) with 16 GB memory, 8 core i9, 1T SSD. So the hardware is not so bad at all. thanks

I am trying to debug my iPhone with iOS 14.5.1 with my Xcode 12.5 and found that in the DeviceSupport directory of Xcode, there are sub-firs only up to version 14.4, and no 14.5 folder. How to get around this? where can I get a reliable copy of DeviceSupport 14.5 to debug on real device? thanks a lot !

on iPhone X, or iOS 13.X , I used CGAffineTransformScale to respond to pinch gesture and enlarge photos on an UIViewController from  UIViewController UIGestureRecognizerDelegate code snippet is as follows and used to work fine, but has no effect on iOS 14 or iPhone12. Any hints?  static CGFloat sPreviousScale = 0.0;     if([recognizer state] == UIGestureRecognizerStateEnded) {         sPreviousScale = 1.0;         return;     }     CGFloat newScale = [recognizer scale] - sPreviousScale +1.0;     CGAffineTransform currentTransformation = self.mImageView.transform;     CGAffineTransform newTransform = CGAffineTransformScale(currentTransformation, newScale, newScale);     // perform the new transform     self.mImageView.transform = newTransform;   sPreviousScale = [recognizer scale];