xcode

问题 I have added a show segue from table cell in one view controller to another table view embedded in a navigation controller. When I click on the cell in the first view the segue works as expected and brings up the new view. However, the "Back" button (with the title of the original view) does not appear in the navigation bar. I searched SO and found a number of such questions asked in the past (both for Swift and Objective-C). Most of them suggest that the first view needs a title for this to

问题 I've been working on an OS X app in Xcode. An option that completely perplexes me is "Presentation", with the two options "Single" and "Multiple" what does this attribute do? 回答1: So, this was actually "obvious" once I used it. Basically, this feature causes a window to be displayed once, or multiple times if the corresponding segue in a storyboard has been triggered multiple times. To see this in action, add a create a storyboard with a view controller in it. The place a button on the view,

问题 trying to compile an iOS app with OpenCV 4.3 with contrib in a react native app. The app works fine in xcode, but as soon as I try compiling to bit code, the app fails. I've gone through several similar questions, but have not had any results and I'm hoping someone more experienced than I might have some suggestions. The .ipa file does generate and I can test it on an iPad or iPhone, but as soon as the app opens, it crashes. Here is the crash log; {"app_name":"helloOpenCV","timestamp":"2020

问题 I am new to Swift Programming and I am having problems. So what I want to do is when the user selects the row in a table then I want to grab the selected row's title and then pass it to the next View Controller. Here is my code for the First View Controller: let senderArray = ["Sogyal","Ram"] let messageArray = ["Hello","What's up?"] cell.senderName.text = senderArray[indexPath.row] cell.senderMessage.text = messageArray[indexPath.row] override func tableView(_ tableView: UITableView,

问题 I am trying to remove a row from my NStableView by swipe function. I am using macOS 10.13 and swift 4 and pretty new to swift coding. I tried to follow: Implementing NSTableViewRowAction using Swift but it did not work for me. And this is how I implement it: public func tableView(_ tableView: NSTableView, rowActionsForRow row: Int, edge: NSTableView.RowActionEdge) -> [NSTableViewRowAction] { // left swipe if edge == .trailing { let deleteAction = NSTableViewRowAction(style: .destructive,

问题 I am trying to remove a row from my NStableView by swipe function. I am using macOS 10.13 and swift 4 and pretty new to swift coding. I tried to follow: Implementing NSTableViewRowAction using Swift but it did not work for me. And this is how I implement it: public func tableView(_ tableView: NSTableView, rowActionsForRow row: Int, edge: NSTableView.RowActionEdge) -> [NSTableViewRowAction] { // left swipe if edge == .trailing { let deleteAction = NSTableViewRowAction(style: .destructive,

问题 I have a header file named A.h, another header file named B.h. In B.h, #include "XYZ/A.h" but Xcode complains "XYZ/A.h" file not found. I tried to make a subfolder XYZ in the folder where B.h is, and put A.h into XYZ, but the same error. How to solve this? ===> Set parent folder of XYZ folder in project build setting "header search path". Problem resolved! I don't want to change the header file B.h - I want to keep the relative path "XYZ/A.h". PLEASE NOTE: Both A.h and B.h are added into

问题 I have a header file named A.h, another header file named B.h. In B.h, #include "XYZ/A.h" but Xcode complains "XYZ/A.h" file not found. I tried to make a subfolder XYZ in the folder where B.h is, and put A.h into XYZ, but the same error. How to solve this? ===> Set parent folder of XYZ folder in project build setting "header search path". Problem resolved! I don't want to change the header file B.h - I want to keep the relative path "XYZ/A.h". PLEASE NOTE: Both A.h and B.h are added into

问题 I have a header file named A.h, another header file named B.h. In B.h, #include "XYZ/A.h" but Xcode complains "XYZ/A.h" file not found. I tried to make a subfolder XYZ in the folder where B.h is, and put A.h into XYZ, but the same error. How to solve this? ===> Set parent folder of XYZ folder in project build setting "header search path". Problem resolved! I don't want to change the header file B.h - I want to keep the relative path "XYZ/A.h". PLEASE NOTE: Both A.h and B.h are added into

问题 I would like to create a status bar application which has non-menu style. same as FaceTab for facebook (I mean only interface, not functional)... this is my codes: -(void)awakeFromNib{ statusItem = [[[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength] retain]; [statusItem setView:customView]; //[statusItem setMenu:menu]; [statusItem setTitle:@"Status"]; [statusItem setHighlightMode:YES]; } ..... so once I Use NSMenu everything works fine but when I use NSView and