objective-c

问题 I'm new to video programming. I'm trying to exercise it but I'm having trouble, which merges two video files to one. The merge I mean is as follows.. I have first video like this Second video also like this I want them to merge like this I didn't want to use 2 video players because I want to send the merged video file to someone. I searched all day to solve this, but I could't find how to. I wrote code referencing this link but it shows first video only, not merged. My Code: NSURL *firstURL =

问题 Is it possible to write unity IOS plugin in Swift? I already have a working swift framework and want to use it as a plugin in Unity I saw some places which say it can only be done on Objective-c but is there a workaround for swift? 回答1: How to call Unity methods Unity interface functions are defined in UnityInterface.h in Xcode project built by Unity. This header file is imported in UnitySwift-Bridging-Header.h , so you can call the functions directly in your Swift codes. To call Unity

问题 Is it possible to write unity IOS plugin in Swift? I already have a working swift framework and want to use it as a plugin in Unity I saw some places which say it can only be done on Objective-c but is there a workaround for swift? 回答1: How to call Unity methods Unity interface functions are defined in UnityInterface.h in Xcode project built by Unity. This header file is imported in UnitySwift-Bridging-Header.h , so you can call the functions directly in your Swift codes. To call Unity

问题 I am getting the crash shown below in Crashlytics. I am unable to understand where this is coming form within the app. Unfortunately I have never been able to generate this crash myself, but it is occurring in the wild. There is only one reference to the app name, and there is nothing that leads to show where in the app this is coming from. Is the fact that there is no data as to where in the app this occurs, an indication of an issue occurring during didFinishLaunchingWithOptionsand thus not

问题 Surprise! I've a variable like this, NSInteger index = 0; I'm comparing it with one of subviews count (which returns NSUInteger ) like this, if((index-1) <= [[currentmonth subviews] count]) { NSLog(@"true"); } else { NSLog(@"false"); } This always giving false. but If I'll do like this, if ((index-1) <= 42) { NSLog(@"true"); } else { NSLog(@"false"); } This always giving true. I feel that, this because we can't compare NSInteger with NSUInteger correct? I caught this issue, when I have a

问题 I have a problem, with openGL views. I have two openGL views. The second view is added as a subview to the mainview. The two opengl views are drawn in two different opengl contexts. I need to capture the screen with the two opengl views. The issue is that if I try to render one CAEAGLLayer in a context as below: CGContextRef context = UIGraphicsGetCurrentContext(); CGContextTranslateCTM(context, 1*(self.frame.size.width*0.5), 1*(self.frame.size.height*0.5)); CGContextScaleCTM(context, 3, 3);

问题 I want to resize the text view when the keyboard appears. The code I have is below. I have auto layout on, hence using a constraint of textView->bottom space from superview and referencing it via IBOutlet distanceFromBottom. - (void)keyboardWillShow:(NSNotification *)notification { [UIView animateWithDuration:0.3 animations:^{ NSDictionary* d = [notification userInfo]; CGRect r = [d[UIKeyboardFrameEndUserInfoKey] CGRectValue]; r = [textView convertRect:r fromView:Nil]; if(IS_IPHONE_6||IS

问题 I am wanting to change the text background color on a tableview's cell when it is hovered upon, similar to how AddressBook "highlights" the label of a contact's element when you mouseover the label names. However I cannot figure out how to accomplish... detecting a mouseover on a particular NSCell and... After detecting the cell his hovered upon, highlighting the text in that cell (not highlighting the entire row as if the user selected that row) As NSCell is not a subclass of NSView this

问题 I am wanting to change the text background color on a tableview's cell when it is hovered upon, similar to how AddressBook "highlights" the label of a contact's element when you mouseover the label names. However I cannot figure out how to accomplish... detecting a mouseover on a particular NSCell and... After detecting the cell his hovered upon, highlighting the text in that cell (not highlighting the entire row as if the user selected that row) As NSCell is not a subclass of NSView this

问题 I am wanting to change the text background color on a tableview's cell when it is hovered upon, similar to how AddressBook "highlights" the label of a contact's element when you mouseover the label names. However I cannot figure out how to accomplish... detecting a mouseover on a particular NSCell and... After detecting the cell his hovered upon, highlighting the text in that cell (not highlighting the entire row as if the user selected that row) As NSCell is not a subclass of NSView this