I'm very new to AVFoundation and QuartzCore development and I'm having troubles with CALayers. I'm sorry if this is a silly problem.
Here's my code:
.h
#import <Cocoa/Cocoa.h>
#import <AVFoundation/AVFoundation.h>
#import <QuartzCore/QuartzCore.h>
#interface Document : NSPersistentDocument
{
AVPlayer *player;
AVPlayerLayer *playerLayer;
NSView *playerView;
}
#property AVPlayerLayer *playerLayer;
#property AVPlayer *player;
#property IBOutlet NSView *playerView;
#end
.m
#import "Document.h"
#implementation Document
#synthesize playerView;
#synthesize player;
#synthesize playerLayer;
- (id)init
{
self = [super init];
if (self) {
}
return self;
}
- (NSString *)windowNibName
{
return #"Document";
}
- (void)windowControllerDidLoadNib:(NSWindowController *)aController
{
[super windowControllerDidLoadNib:aController];
[[aController window] setMovableByWindowBackground:YES];
// HERE the layer is nill, and I don't understand why it's not getting initialized?!
[[[self playerView] layer] setBackgroundColor:CGColorGetConstantColor(kCGColorBlack)];
}
+ (BOOL)autosavesInPlace
{
return YES;
}
#end
Any kind of help is very appreciated!
If the layer is nil, you should start by suspecting that its parent playerView is nil. Is it? If so, you probably haven't hooked up the outlet in the nib. (I see you have declared playerView as an outlet in your code, but that doesn't mean you've configured the nib correctly.)
Related
I am trying to implement a NSWindowController subclass with new xib-file, I read up in lots of books, and researched on StackOverflow, but none of the steps provided made my window show, nor did the subclass code get executed. The new xib-file has its File's Owner set to "LogNavigatorController" and connections to the window and its contents have been made.
My AppDelegate.h:
#import <Cocoa/Cocoa.h>
#class LogNavigatorWindowController;
#interface AppDelegate : NSObject <NSApplicationDelegate>
{
LogNavigatorWindowController *logsWindowController;
}
#end
My AppDelegate.m:
#import "AppDelegate.h"
#import "LogNavigatorWindowController.h"
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
logsWindowController = [[LogNavigatorWindowController alloc] initWithWindowNibName:#"LogNavigatorWindowController"];
[logsWindowController showWindow:self];
}
#end
My LogNavigatorWindowController.h:
#import <Cocoa/Cocoa.h>
#interface LogNavigatorWindowController : NSWindowController
{
NSArray *directoryList1;
NSArray *directoryList2;
NSMutableArray *directoryList;
NSMutableArray *filePaths1;
NSMutableArray *filePaths2;
}
#property (assign) IBOutlet NSWindow *window;
#property (weak) IBOutlet NSTableView *logsTableView;
#property (unsafe_unretained) IBOutlet NSTextView *logsTextView;
#property (assign) IBOutlet NSArrayController *LogListController;
#property (retain) NSMutableArray *logsArray;
- (void) myDirectoryLogFunction;
#end
My LogNavigatorController.m:
#import "LogNavigatorWindowController.h"
#interface LogNavigatorWindowController ()
#end
#implementation LogNavigatorWindowController
#synthesize logsTableView;
#synthesize logsTextView;
#synthesize window;
- (id)init
{
self = [super initWithWindowNibName:#"LogNavigatorWindowController"];
[self loadWindow];
[self showWindow:#"Log Navigator"];
[self.window makeKeyAndOrderFront:nil];
if (self)
{
// Initialization code here.
[self myDirectoryLogFunction];
}
return self;
}
- (void)windowDidLoad
{
[super windowDidLoad];
// Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
}
- (void) myDirectoryLogFunction
{
NSLog(#"Code execution test successful");
}
#end
You don't need to create the window property since it is already available for NSWindowController subclasses. Maybe that causes the problem.
Also your init method contains a lot of code that doesn't belong there. Remove
[self loadWindow];
[self showWindow:#"Log Navigator"];
[self.window makeKeyAndOrderFront:nil];
as well as replace
self = [super initWithWindowNibName:#"LogNavigatorWindowController"];
with
self = [super init];
You may want to remove the init method at all, since you don't need it in your case.
and move
[self myDirectoryLogFunction];
to the windowDidLoad method.
Also always check that the code for instantiating the window controller (in your case from the app delegates didFinishLaunching: ) is called. Sometimes it helps to create a new project and test there, if you may have changed too much within the original project and by accident removed delegate connections or similar.
I want to make a multiple windows mac application and I am stuck with the multiple window part !
I can display some windows by creating a xib file and using this method :
-(void)popView:(NSString *)viewName {
_windowController = [[AddProdutWindowController alloc] initWithWindowNibName:viewName];
[_windowController showWindow:nil];
}
With
#property (strong, nonatomic) AddProdutWindowController *windowController;
in my header file and AddProductViewController inherit from NSWindowViewController
I have linked a subclass of NSViewController in Xcode to my xib file.
Now I want to send some datas to my new view and show them in some NSTextField and I have not a single clue how to do it !
I'm very confused with the WindowsController and ViewController, I don't exactly know how / where use them.
Thank you for helping.
Try this:
your firstWindowController.h:
#import <Cocoa/Cocoa.h>
#class SecondWindowController;
#interface ResultWindowController : NSWindowController{
SecondWindowController *swc;
}
#property (assign) NSNumber *xyz;
...
your firstWindowController.m:
#import "FirstWindowController.h"
#import "SecondWindowController.h"
#implementation FirstWindowController
#synthesize xyz;
- (IBAction)openSecondWindow:(id *)sender {
if (!swc)
{
swc = [[SecondWindowController alloc] init];
}
[Swc setFwc:self];
[Swc showWindow:self];
your secondWindowController.h:
#import <Cocoa/Cocoa.h>
#class FirstWindowController;
#interface SecondWindowController : NSWindowController {
FirstWindowController *fwc;
}
#property (retain) IBOutlet FirstWindowController *fwc;
#end
your secondWindowController.m:
#import "SecondWindowController.h"
#import "FirstWindowController.h"
#implementation SecondWindowController
#synthesize fwc;
- (id)init
{
if(![super initWithWindowNibName:#"SecondWindow"])
return nil;
NSLog(#"_init: %#", NSStringFromClass([self class]));
return self;
}
- (void)windowDidLoad
{
[super windowDidLoad];
NSLog(#"swc didload self=%p", self); //thats your second window controller
NSLog(#"fwc value is %#", fwd.xyz); // here you should be able to see the value from FirtsWindowController
}
I'm studing protocol and delegates using an Example! When I try to re create this example I notice that this condition is not respected:
if([delegate respondsToSelector:#selector(amountEntered:)]) {blabla}
where is the mistake? Scripts:
First View .h
#import <UIKit/UIKit.h>
#import "EnterAmountViewController.h"
#interface DelegateExampleViewController : UIViewController <EnterAmountDelegate>{
IBOutlet UILabel *amountLabel;
}
-(IBAction)changeAmountPressed;
#end
First View .m
#import "DelegateExampleViewController.h"
#implementation DelegateExampleViewController
-(IBAction)changeAmountPressed
{
EnterAmountViewController * enterAmountVC = [[EnterAmountViewController alloc]init];
enterAmountVC.delegate = self;
}
-(void)amountEntered:(NSInteger)amount
{
amountLabel.text = [NSString stringWithFormat:#"%i" , amount];
}
#end
Second View .h
#import <UIKit/UIKit.h>
#protocol EnterAmountDelegate <NSObject>
-(void)amountEntered:(NSInteger)amount;
#end
#interface EnterAmountViewController : UIViewController {
IBOutlet UITextField *amountTextField;
id<EnterAmountDelegate> delegate;
}
-(IBAction)savePressed;
#property(nonatomic,retain) id<EnterAmountDelegate> delegate;
#end
Second View .m
#import "EnterAmountViewController.h"
#import "DelegateExampleViewController.h"
#implementation EnterAmountViewController
#synthesize delegate;
- (void)viewDidLoad {
[super viewDidLoad];
amountTextField.text = #"";
[amountTextField becomeFirstResponder];
}
-(IBAction)savePressed
{
if([delegate respondsToSelector:#selector(amountEntered:)])
{
[delegate amountEntered:[amountTextField.text intValue]];
NSLog(#"rugg");
}
}
#end
Thanks in advance!
In the method:
-(IBAction)changeAmountPressed
{
EnterAmountViewController * enterAmountVC = [[EnterAmountViewController alloc]init];
enterAmountVC.delegate = self;
}
you are creating an instance of EnterAmountViewController on the stack as a local variable. This variable will be inaccessible at the end of the scope. So, when you execute savePressed you are doing it on a different object where you did not set delegate.
In other words, when you check
if([delegate respondsToSelector:#selector(amountEntered:)])
it returns NO because delegate is nil...
The correct way to set the delegate is using the prepareForSegue mechanism:
#implementation DelegateExampleViewController
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
[(EnterAmountViewController*)segue.destinationViewController setDelegate:self];
}
...
You do not need the changeAmountPressed method nor the relative binding.
I know this is just a fundamental question but still somewhere I am missing something, I am playing with passing data to a textView from another class. For this I have created two classes one with xib file (ViewController) and another without(secondVC).
What I am trying to do is that I have a textview in ViewController class and wanted to pass the data to this textView from secondVC. This is how I am doing.
//ViewController.h
#import <UIKit/UIKit.h>
#import "secondVC.h"
#interface ViewController : UIViewController{
IBOutlet UITextView *textView;
}
#property (nonatomic, retain) UITextView *textView;
- (IBAction)go:(id)sender;
#end
//ViewController.m
- (IBAction)go:(id)sender{
secondVC *sec = [[secondVC alloc] init];
[sec print];
}
//secondVC.h
#import <UIKit/UIKit.h>
#import "ViewController.h"
#interface secondVC : UIViewController
- (void)print;
#end
//secondVC.m
- (void)print{
NSString *printThis = #"This works";
ViewController *vc = [[ViewController alloc] init];
[vc.textView setText:printThis];
//vc.textView.text = printThis //Tried both
}
Any suggestions would be appreciated.
Thanks
you can do like this :
//ViewController.h
#import <UIKit/UIKit.h>
#import "secondVC.h"
#interface ViewController : UIViewController{
IBOutlet UITextView *textView;
}
#property (nonatomic, retain) UITextView *textView;
- (IBAction)go:(id)sender;
#end
//ViewController.m
- (IBAction)go:(id)sender{
secondVC *sec = [[secondVC alloc] init];
sec.viewController = self;
[sec print];
}
//secondVC.h
#import <UIKit/UIKit.h>
#import "ViewController.h"
#interface secondVC : UIViewController {
ViewController *viewController;
}
#property(nonatomic, retain)ViewController *viewController;
- (void)print;
#end
//secondVC.m
#synthesize viewController;
- (void)print{
NSString *printThis = #"This works";
self.viewController.textView.text = printThis ;
}
Try with protocol... if you want to send string from textView(child) to other ViewController(parent)
You need a delegate method that is fired from the SecondVC and handled in the first one (ViewController).
There are a few issues here:
You've got a ViewController creating a new secondVC and sending it a print message. That's okay, but the implementation of -print creates a different instance of ViewController and tries to set the text of it's textView property. That's clearly not what you want -- you should instead be sending the text back to the original instance of ViewController.
That second instance of ViewController very likely has its textView property set to nil since textView is an outlet, but you haven't loaded its view from the .xib.
It's really not nice for one view controller to mess with the views of another view controller. The secondVC should be giving the text to the original ViewController object, not trying to set the text of one of its views.
To facilitate communication from secondVC to ViewController, give secondVC a property to keep track of the original ViewController. The usual thing to do here is to define a delegate protocol for secondVC and implement that protocol in ViewController. When ViewController creates secondVC, it sets the delegate of secondVC to itself. That gives secondVC a pointer to its delegate (it shouldn't care whether its a ViewController or some other kind of object, as long as the delegate implements the right methods).
.h file:
#import <UIKit/UIKit.h>
#protocol StringDelegate <NSObject>
-(void)getArrayOfStrings:(NSMutableArray*)strArray;
#end
#interface WWSettings : UIViewController{
}
#property(nonatomic,assign)id<StringDelegate>delegate;
#end
.m file:
#import "WWSettings.h"
#implementation WWSettings
#synthesize delegate;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
-(void)blablablaFunction{
[delegate getArrayOfStrings:yourArray];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
#end
if you dont understand how it works .. ask ! i'll make my best to help you )
your secondVC
#import <UIKit/UIKit.h>
#import "WWSettings.h"
#interface secondVC : UIViewController<StringDelegate>{
WWSettings *obj;
}
#end
and .m file :
#import "secondVC.h"
#implementation secondVC
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
-(void)getArrayOfStrings:(NSMutableArray *)strArray{
// here you get your array !!! it's a delegate function made by you in child viewController;
}
- (void)viewDidLoad
{
obj = [[WWSettings alloc]init];
[obj setDelegate:self];
[super viewDidLoad];
// Do any additional setup after loading the view.
}
first VC .h file :
#import <UIKit/UIKit.h>
#protocol textViewChildDelegate <NSObject>
-(void)getStrings:(NSString*)string;
#end
#interface textViewChild : UIViewController<UITextViewDelegate>{
UITextView *textView;
}
#property(nonatomic,assign)id<textViewChildDelegate>delegate;
#end
.m file:
#import "textViewChild.h"
#implementation textViewChild
#synthesize delegate;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
-(void)myWorkingMethod{
// get string from textView
[delegate getStrings:textView.text];
}
- (void)viewDidLoad
{
textView = [[UITextView alloc]initWithFrame:CGRectMake(0, 240, 320, 240)];
[super viewDidLoad];
// Do any additional setup after loading the view.
}
Now go to secondVC .h:
#import <UIKit/UIKit.h>
#import "textViewChild.h"
#interface TextViewViewController : UIViewController<textViewChildDelegate>{
UITextView * myfirstTextView;
}
#end
and to .m file:
#import "TextViewViewController.h"
#implementation TextViewViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)getStrings:(NSString *)string{
myfirstTextView.text = string; // finally we get string from child view controller
}
- (void)viewDidUnload
{
myfirstTextView = [[UITextView alloc]init];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
I read in this same site how to inset and UILabel (subclass UILabel and override the required methods). Before adding it to my app I decided to test it out in a standalone test app. Code is shown below.
Here's MyUILabel.h
#import <UIKit/UIKit.h>
#interface MyUILabel : UILabel
#end
Here's MyUILabel.m
#import "MyUILabel.h"
#import <QuartzCore/QuartzCore.h>
#implementation MyUILabel
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
// for border and rounding
-(void) drawRect:(CGRect)rect
{
self.layer.cornerRadius = 4.0;
self.layer.borderWidth = 2;
[super drawRect:rect];
}
// for inset
-(void) drawTextInRect:(CGRect)rect
{
UIEdgeInsets insets = {0, 5, 0, 5};
[super drawTextInRect: UIEdgeInsetsInsetRect(rect, insets)];
}
Here's my ViewController.h
#import <UIKit/UIKit.h>
#import "MyUILabel.h"
#interface ViewController : UIViewController
{
MyUILabel *myDisplay;
}
#property (strong, nonatomic) IBOutlet MyUILabel *myDisplay;
#end
Here's ViewController.m:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize myDisplay;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
myDisplay.text = #"Hello World!";
}
- (void)viewDidUnload
{
[self setMyDisplay:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end
None of the methods in MyUILabel.m (that Im overriding) get called.
Insights into why are greatly appreciated.
Regards,
Ramon.
Ok. I did some further digging and in Xcode there is a field visible when looking at the nib file. Its the 'Identity Inspector' (3rd icon from left). This needed to be changed from UILabel to MyUILabel.
Now it works!