cocoa

问题 when I create an xCode project with the 'Command Line Tool' c++ stdc++ template, i am able to include and compile opencv headers and run some code. But i want to use OpenCV in a 'Cocoa Application' context. When created with that template, i got compile errors when I include the OpenCV headers in main.mm. (I already changed main.m to main.mm, the '//NSApplicationMain(argc, (const char **) argv);' is commented out) One of those errors is: "Statement-expressions are allowed only inside

问题 I have been wondering for a while, after asking different people and without any of them providing what I would call an "at least a bit concrete answer": Question: Where, in an iPhone application should an application keep the references to it's Model Classes (using the MVC approach) ? In iPhone (and Cocoa) applications we have what we call the "App Delegate", which basically start's up our application and inits our controllers, also handles UITouch events. So is the App Delegate a controller

问题 When resolving an NSURL from a security scoped bookmark, if the user has renamed or moved that file or folder, the bookmark will be stale. Apple's document says this regarding staleness: isStale On return, if YES, the bookmark data is stale. Your app should create a new bookmark using the returned URL and use it in place of any stored copies of the existing bookmark. Unfortunately, this rarely works for me. It may work 5% of the time. Attempting to create a new bookmark using the returned URL

问题 I have created a simple NSStatusBar with a NSMenu set as the menu. I have also added a few NSMenuItems to this menu, which work fine (including selectors and highlighting) but as soon as I add a custom view (setView:) no highlighting occurs. CustomMenuItem *menuItem = [[CustomMenuItem alloc] initWithTitle:@"" action:@selector(openPreferences:) keyEquivalent:@""]; [menuItem foo]; [menuItem setTarget:self]; [statusMenu insertItem:menuItem atIndex:0]; [menuItem release]; And my foo method is: -

问题 I'm trying to connect to a server using a .pfx that is stored in a .mobileconfig file on my iPhone. When the server ask for it in -(void)connection:(NSURLConnection*)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge*)challenge{ How can I create the NSURLCredential with the .pfx? Should I use + (NSURLCredential *)credentialWithIdentity:(SecIdentityRef)identity certificates:(NSArray *)certArray persistence:(NSURLCredentialPersistence)persistence If thats the case, how

问题 I'm trying to connect to a server using a .pfx that is stored in a .mobileconfig file on my iPhone. When the server ask for it in -(void)connection:(NSURLConnection*)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge*)challenge{ How can I create the NSURLCredential with the .pfx? Should I use + (NSURLCredential *)credentialWithIdentity:(SecIdentityRef)identity certificates:(NSArray *)certArray persistence:(NSURLCredentialPersistence)persistence If thats the case, how

问题 I'm pulling hairs here. I have an NSTextField created on a xib that has an intrinsicContentSize adjusted to it's stringValue. If I create a textField programmatically like so: _textfield = [[NSTextField alloc] initWithFrame:CGRectZero]; _textfield.translatesAutoresizingMaskIntoConstraints = NO; _textfield.alignment = NSCenterTextAlignment; _textfield.drawsBackground = NO; [_textfield setBordered:NO]; _textfiled.stringValue = @"Test" It's intrinsicContentSize is always (width=-1, height=16) I

问题 I'm pulling hairs here. I have an NSTextField created on a xib that has an intrinsicContentSize adjusted to it's stringValue. If I create a textField programmatically like so: _textfield = [[NSTextField alloc] initWithFrame:CGRectZero]; _textfield.translatesAutoresizingMaskIntoConstraints = NO; _textfield.alignment = NSCenterTextAlignment; _textfield.drawsBackground = NO; [_textfield setBordered:NO]; _textfiled.stringValue = @"Test" It's intrinsicContentSize is always (width=-1, height=16) I

问题 I'm pulling hairs here. I have an NSTextField created on a xib that has an intrinsicContentSize adjusted to it's stringValue. If I create a textField programmatically like so: _textfield = [[NSTextField alloc] initWithFrame:CGRectZero]; _textfield.translatesAutoresizingMaskIntoConstraints = NO; _textfield.alignment = NSCenterTextAlignment; _textfield.drawsBackground = NO; [_textfield setBordered:NO]; _textfiled.stringValue = @"Test" It's intrinsicContentSize is always (width=-1, height=16) I

问题 I have a NSViewController and a variable num . I want to change the size of the window dynamically according to that variable. Is there any way to do that in swift? 回答1: Let's say your window has an IBOutlet named "window", and your dynamic number is named "myDynamicNumber": func resize() { var windowFrame = window.frame let oldWidth = windowFrame.size.width let oldHeight = windowFrame.size.height let toAdd = CGFloat(myDynamicNumber) let newWidth = oldWidth + toAdd let newHeight = oldHeight +