I am experiencing problems on my attempt to popup an image in my view.
I have created a new subclass of UIView (UIViewImageOverlay.m) with the image.
UIViewImageOverlay.m
// ImageOverlay.m
// ButtonPopup
//
//
#import "UIViewImageOverlay.h"
#implementation UIViewImageOverlay
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
CGContextRef contextRef = UIGraphicsGetCurrentContext();
UIImage *myImage = [UIImage imageNamed:#"test.jpeg"];
int w = myImage.size.width;
int h = myImage.size.height;
CGContextDrawImage(contextRef, CGRectMake(0, 0, w, h), myImage.CGImage);
CGContextRelease(contextRef);
}
#end
In my ViewController.m i have a button pushPush to load the view, but the attempt gives a warning
// ViewController.m
// ButtonPopup
//
//
#import "ViewController.h"
#import "UIViewImageOverlay.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize viewImageOverlay;
- (void)viewDidLoad
{
[super viewDidLoad]; // static
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
- (IBAction)pushPush:(id)sender {
[self.view addSubview:self.viewImageOverlay];
}
#end
ViewController.h
// ViewController.h
// ButtonPopup
//
#import <UIKit/UIKit.h>
#class UIViewImageOverlay;
#interface ViewController : UIViewController {
UIViewImageOverlay *viewImageOverlay;
}
#property(nonatomic, retain) UIViewImageOverlay *viewImageOverlay;
- (IBAction)pushPush:(id)sender;
#end
UIViewImageOverlay.h
// ImageOverlay.h
// ButtonPopup
//
//
#import <UIKit/UIKit.h>
#interface UIViewImageOverlay : UIView
#end
[self.view addSubview:self.viewImageOverlay]; reports Incompatible pointer types sending 'UIViewImageOverlay *' to parameter of type 'UIView *'
Thanks in advance.
declare instance variable viewImageOverlay and define it as a property
You have a forward class declaration in your controller's header file (#class UIViewImageOverlay). It shadows the correct implementation.
Include UIViewImageOverlay.h in the implementation file of your controller
Related
Keeping popover in open state. Then, when I try to switch to 2/3 screen mode and change the position of center BarButtonItem with fixed space BarButtonItem in viewWillTrainsition, my popover tool-tip moves to the previous location of barButtonItem.
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
if (size.width>size.height) {
_fixedSpace.width = 280;
} else {
_fixedSpace.width = 80;
}
} completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
}];}
From iOS11, bar button item is using constraint instead of frames. So try giving a constraint to each bar button item. It might doesn't reflect visually but it plays a major role in producing this kind of issue.
Try using below code to set the constraint:
if #available(iOS 11.0, *)
{
_fixedSpace.widthAnchor.constraint(equalToConstant: 280.0).isActive = true
}
Hope this helps!
I replicated same scenario and I found a fix for this as below:
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
if (size.width > size.height) {
fixedSpace.width = 280;
} else {
fixedSpace.width = 80;
}
} completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
CGRect rect = [self.view convertRect:barBtn.frame fromView:barBtn];
popover.sourceRect = rect;
}];
Try to reset the sourceRect property in the completion block.
Hope this is helpful!
As far as I understood your question I want to propose a simple solution for this :
I have took a Viewcontroller and PopoverView in storyboard. Viewcontroller will work as main view controller where as PopoverView will work to display as popover.
(Caution : Don’t Forget to set Explicit Content Size for PopoverView in StoryBoard) for more reference you can see attached screen shot of my storyboard.
Here is sample source code of Viewcontroller in which you will find Popoverview position will change as per the right button frame change.
This code is developed using Objective C
ViewController.h
//
// ViewController.h
// SOPopoverControllerDemo
//
// Created by Test User on 08/01/18.
// Copyright © 2018 Test User All rights reserved.
//
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
#end
ViewController.m
//
// ViewController.m
// SOPopoverControllerDemo
//
// Created by Test User on 08/01/18.
// Copyright © 2018 Test User All rights reserved.
//
#import "ViewController.h"
#interface ViewController () <UIPopoverPresentationControllerDelegate>
#property (weak, nonatomic) IBOutlet UIBarButtonItem *leftToolBarBtn;
#property (weak, nonatomic) IBOutlet UIBarButtonItem *rightToolBarBtn;
#property (weak, nonatomic) IBOutlet UIBarButtonItem *flexibleBtn;
#property (weak, nonatomic) IBOutlet UIToolbar *bottomToolBar;
#property (weak,nonatomic) UIPopoverPresentationController *popOverController;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
if (self.view.frame.size.width > self.view.frame.size.height) {
self.rightToolBarBtn.width = 200;
self.leftToolBarBtn.width = 200;
} else {
self.rightToolBarBtn.width = 150;
self.leftToolBarBtn.width = 150;
}
}
- (void) viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
if (size.width > size.height) {
_rightToolBarBtn.width = 200;
[self dismissViewControllerAnimated:true completion:nil];
[self rightToolBarBtnTapped:_rightToolBarBtn];
} else {
_rightToolBarBtn.width = 150;
[self dismissViewControllerAnimated:true completion:nil];
[self rightToolBarBtnTapped:_rightToolBarBtn];
}
} completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
}];
}
- (IBAction)rightToolBarBtnTapped:(id)sender {
//Grab the controller for popover
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *controller = [storyboard instantiateViewControllerWithIdentifier:#"PopoverView"];
if (self.view.frame.size.width > self.view.frame.size.height ) {
controller.preferredContentSize = CGSizeMake(200, 100);
} else {
controller.preferredContentSize = CGSizeMake(150, 100);
}
controller.modalPresentationStyle = UIModalPresentationPopover;
[self presentViewController:controller animated:YES completion:nil];
// configure the Popover presentation controller
_popOverController = [controller popoverPresentationController];
_popOverController.delegate = self;
_popOverController.permittedArrowDirections = UIPopoverArrowDirectionUp;
_popOverController.barButtonItem = self.rightToolBarBtn;
}
//--------------------------------------------------
#pragma mark -> UIPopOverController Delegate
//--------------------------------------------------
- (BOOL)popoverPresentationControllerShouldDismissPopover:(UIPopoverPresentationController *)popoverPresentationController {
return YES;
}
- (void)popoverPresentationControllerDidDismissPopover:(UIPopoverPresentationController *)popoverPresentationController {
NSLog(#"Popover Did Dismissed");
}
#end
PopoverView.h
//
// PopoverView.h
// SOPopoverControllerDemo
//
// Created by Test User on 08/01/18.
// Copyright © 2018 Test User All rights reserved.
//
#import <UIKit/UIKit.h>
#interface PopoverView : UIViewController
#end
PopoverView.m
//
// PopoverView.m
// SOPopoverControllerDemo
//
// Created by Test User on 08/01/18.
// Copyright © 2018 Test User All rights reserved.
//
#import "PopoverView.h"
#interface PopoverView ()
#end
#implementation PopoverView
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
So I seem to have spent the last couple of days trying to find various solutions for this and have decided it's probably best that I just ask someone.
I'm using a storyboard and I send an array from one ViewController to another just fine. But once in this SecondViewController i'm having an issue with it. I would then like to be able to access the array in a subview of this view controller to be able to draw a graph with the data but whenever I try I just always get null from the code in the subview even though it's definitely in the ParentViewController. Could someone please have a look at my current code and let me know how I would get this data in my subview.
ParentViewController.h
#import <UIKit/UIKit.h>
#import "GraphView.h"
#import "Model.h"
#interface GraphViewController : UIViewController
#property (strong) Model *model;
#property (weak) GraphView *graph;
#property (strong) NSArray *data;
#end
ParentViewController.m
#import "GraphViewController.h"
#interface GraphViewController ()
#end
#implementation GraphViewController
#synthesize graph;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
NSLog(#"Model data: %#",self.data);//prints just fine
[self.graph setNeedsDisplay];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
SubView.h
#import <UIKit/UIKit.h>
#import "Model.h"
#interface GraphView : UIView
#property (weak) NSArray *array;
#property (strong) Model *model;
#end
Subview.m
#import "GraphView.h"
#import "GraphViewController.h"
#implementation GraphView
- (id)initWithFrame:(CGRect)frame dataArray:(NSArray*)data {
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
- (void)drawRect:(CGRect)rect {
// Drawing code
NSLog(#"Draw Rect");
NSLog(#"%#", self.array);//The bit that keeps returning null
if (self.array != nil){
NSLog(#"Drawing Rect");
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, 160, 100);
CGContextAddLineToPoint(ctx,260,300);
CGContextAddLineToPoint(ctx,60,300);
CGContextClosePath(ctx);
[[UIColor blueColor] setFill];
[[UIColor greenColor] setStroke];
CGContextSetLineWidth(ctx,2.0);
CGContextDrawPath(ctx,kCGPathFillStroke);
}
}
Now I know that it would return null now because i'm not actually assigning it to anything but i've tried so many different ways of trying to assign it to the data array in the parent view controller i've forgotten how i even started. Any help would be much appreciated!
Assign GraphView's data in viewDidLoad. Also make sure that your self.graph is properly connected/initialized.
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
NSLog(#"Model data: %#",self.data);//prints just fine
self.graph.array = self.data;
[self.graph setNeedsDisplay];
}
There is 3 issues in your code:
#property (weak) GraphView *graph; // graph is weak, the object will
be released after the assignment.
No assignment for self.array in the GraphView.
Didn't add the graph into the controller.view.subviews.
Here is my code:
#interface GraphViewController : UIViewController
#property (strong) Model *model;
#property (retain) GraphView *graph; // change to retain
#property (strong) NSArray *data;
#end
#implementation GraphViewController
#synthesize graph;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.data = [[NSArray alloc] initWithObjects:#1, #2, nil];
self.graph = [[GraphView alloc] initWithFrame:CGRectMake(0, 0, 320, 320) dataArray:self.data];
[self.view addSubview:self.graph]; // Init graph and add into subviews.
}
#end
#interface GraphView : UIView
- (id)initWithFrame:(CGRect)frame dataArray:(NSArray*)data;
#property (weak) NSArray *array;
#property (strong) Model *model;
#end
#implementation GraphView
- (id)initWithFrame:(CGRect)frame dataArray:(NSArray*)data {
self = [super initWithFrame:frame];
if (self) {
// Initialization code
self.array = data; // Assign the array.
}
return self;
}
- (void)drawRect:(CGRect)rect {
// Drawing code
NSLog(#"Draw Rect");
NSLog(#"%#", self.array);//The bit that keeps returning null
if (self.array != nil){
NSLog(#"Drawing Rect");
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, 160, 100);
CGContextAddLineToPoint(ctx,260,300);
CGContextAddLineToPoint(ctx,60,300);
CGContextClosePath(ctx);
[[UIColor blueColor] setFill];
[[UIColor greenColor] setStroke];
CGContextSetLineWidth(ctx,2.0);
CGContextDrawPath(ctx,kCGPathFillStroke);
}
}
#end
I have recently started learning core graphics to draw on views, but every time I call setNeedsDisplay, the method runs but doesn't trigger drawRect. In my project, I have a view on a view controller. The view contains an if statement in drawRect that checks if a BOOL variable is YES or NO. If YES, it uses the code to draw a red circle. If NO, it draws a blue circle. In the BOOL's setter, it calls setNeedsDisplay. I create an instance of this view class in the ViewController and set the BOOL but the view is not redrawing. Why is the method not getting called? I posted the xcode files and code bits below.
Customview.m:
#import "CustomView.h"
#implementation CustomView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self setup];
}
return self;
}
-(void)awakeFromNib{
[self setup];
}
-(void)setup{
_choice1 = YES;
}
-(void)setChoice1:(BOOL)choice1{
_choice1 = choice1;
[self setNeedsDisplay];
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
if (_choice1) {
UIBezierPath * redCircle = [UIBezierPath bezierPathWithOvalInRect:rect];
[[UIColor redColor]setFill];
[redCircle fill];
}else if (!_choice1){
UIBezierPath * blueCircle = [UIBezierPath bezierPathWithOvalInRect:rect];
[[UIColor blueColor]setFill];
[blueCircle fill];
}
}
#end
CustomView.h:
#import <UIKit/UIKit.h>
#interface CustomView : UIView
#property (nonatomic) BOOL choice1;
#end
ViewController.m:
#import "ViewController.h"
#import "CustomView.h"
#interface ViewController ()
- (IBAction)Change:(id)sender;
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)Change:(id)sender {
CustomView * cv = [[CustomView alloc]init];
[cv setChoice1:NO];
}
#end
Full project: https://www.mediafire.com/?2c8e5uay00wci0c
Thanks
You need to create an outlet for your CustomView in your ViewController. Delete the code that creates the new CustomView instance and use _cv to refer to the customView.
#interface ViewController ()
- (IBAction)Change:(id)sender;
#property (weak,nonatomic) IBOutlet CustomView *cv;
#end
Then, in the storyboard, connect ViewController's cv outlet to the CustomView. Also, you'll need to implement the initFromCoder: method on CustomView.
- (id)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])) {
[self setup];
}
return self;
}
I've setup a delegate to take the old and new position of a gauge. However, I can't seem to get a response from the delegate. I could be missing something but I've done a bunch of research and it seems like everything is in order.
MeterView.h
#import <UIKit/UIKit.h>
#import "KTOneFingerRotationGestureRecognizer.h"
#protocol MeterViewDelegate;
#interface MeterView : UIView{
IBOutlet UIImageView *gauge;
IBOutlet UIImageView *needle;
float rotation, oldPos, newPos;
KTOneFingerRotationGestureRecognizer *rgest;
}
#property (nonatomic, weak) id<MeterViewDelegate> delegate;
- (IBAction)handleMovedNeedle;
#end
#protocol MeterViewDelegate <NSObject>
- (void)meterView:(MeterView*)view OldValue:(float)oldval NewValue:(float)newval;
#end
MeterView.m
#import "MeterView.h"
#import <QuartzCore/QuartzCore.h>
#implementation MeterView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
-(void)handleMovedNeedle{
if ([self.delegate respondsToSelector:#selector(meterView:OldValue:NewValue:)]) {
[self.delegate meterView:self OldValue:oldPos NewValue:newPos];
}
else{
NSLog(#"Delegate call FAIL, needle moved from %f, to %f", oldPos,newPos);
}
}
-(void)awakeFromNib{
gauge = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"gauge.png"]];
needle = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"needle.png"]];
needle.frame = CGRectMake(0,gauge.frame.size.height-(needle.frame.size.height/2), gauge.frame.size.width, needle.frame.size.height);
[self addSubview:gauge];
[self addSubview:needle];
rotation = 0;
rgest = [[KTOneFingerRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotate:)];
rgest.center = CGPointMake(CGRectGetMidX([needle bounds]) + needle.frame.origin.x, CGRectGetMidY([needle bounds]) + needle.frame.origin.y);
[self addGestureRecognizer:rgest];
}
- (void)rotate:(UIRotationGestureRecognizer *)recognizer {
switch (recognizer.state) {
case UIGestureRecognizerStateBegan: {
oldPos = ([(NSNumber *)[needle.layer valueForKeyPath:#"transform.rotation.z"] floatValue]/3.14)*100;
}
break;
case UIGestureRecognizerStateChanged: {
CGFloat angle = [(NSNumber *)[needle.layer valueForKeyPath:#"transform.rotation.z"] floatValue];
angle += [recognizer rotation];
if (angle >= 0 && angle <= M_PI) {
[needle setTransform:CGAffineTransformRotate([needle transform], [recognizer rotation])];
rotation += [recognizer rotation];
}
}
break;
case UIGestureRecognizerStateEnded: {
newPos = ([(NSNumber *)[needle.layer valueForKeyPath:#"transform.rotation.z"] floatValue]/3.14)*100;
[self handleMovedNeedle];
}
break;
default:
break;
}
}
#end
ViewController.h
#import <UIKit/UIKit.h>
#import "MeterView.h"
#import "KTOneFingerRotationGestureRecognizer.h"
#interface ViewController : UIViewController<MeterViewDelegate>{
IBOutlet MeterView *secondMeter;
IBOutlet MeterView *thirdMeter;
}
#end
ViewController.m
#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>
#define DEG2RAD(degrees) (degrees * 0.01745327) // degrees * pi over 180
#define RAD2DEG(radians) (radians * 57.2957795) // radians * 180 over pi
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
secondMeter = [[MeterView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
secondMeter.delegate = self;
thirdMeter = [[MeterView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
thirdMeter.delegate =self;
}
-(void)meterView:(MeterView *)view OldValue:(float)oldval NewValue:(float)newval{
NSLog(#"Delegate call SUCCESS, need moved from %f, to %f", oldval,newval);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
This code:
secondMeter = [[MeterView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
secondMeter.delegate = self;
thirdMeter = [[MeterView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
thirdMeter.delegate =self;
creates 2 instances of your view, but it doesn't add them to a view, so they will never be seen.
So, you probably have some other view instances that are on view and don't have delegates, and these views which have delegates but aren't on display. Presumably from an XIB / storyboard as you have outlets.
Connect the views that are on display to the delegate using the outlets rather than creating new instances.
If you make the delegate property in the view an IBOutlet itself then you can connect the view controller as the delegate in the XIB / storyboard and you don't need to worry about the delegate in code at all...
I'm building a graphing app, and I have a view and a view controller, which acts as a delegate for the view (to retrieve information). While I haven't started the actual drawing yet, I am currently trying to store values in a dictionary; however, I have certain NSLogs placed methodically across the view controller and I noticed that the delegate methods I call from the view don't get called at all. For example, I call my scaleForGraph function, but it does not execute. Being new to this, I'm not sure if there's something I'm missing. FYI: I have no errors, it compiles and executes. I've tried to slim the code down as much as possible. Thank you for your help!
Here's the .h for my view, where I define the protocol:
// GraphView.h
#import <UIKit/UIKit.h>
#class GraphView;
#protocol GraphViewDelegate <NSObject>
- (float)scaleForGraph:(GraphView *)requestor;
-(NSMutableDictionary*) valuesForGraph:(GraphView *)requestor withWidth:(float) width;
#end
#interface GraphView : UIView
#property (nonatomic) id <GraphViewDelegate> delegate;
#property (nonatomic) id expressionCopy;
#end
And here's the .m:
#import "GraphView.h"
#implementation GraphView
#synthesize expressionCopy = _expressionCopy;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
self.contentMode = UIViewContentModeRedraw;
}
return self;
}
- (void)awakeFromNib
{
self.contentMode = UIViewContentModeRedraw;
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
CGContextRef c = UIGraphicsGetCurrentContext();
CGRect screenBound = [[UIScreen mainScreen] bounds];
CGSize screenSize = screenBound.size;
CGFloat width = screenSize.width;
CGFloat height = screenSize.height;
float scale = [self.delegate scaleForGraph:self];
NSLog([NSString stringWithFormat:#"My Scale: %f",scale]); //always returns 0
NSMutableDictionary *graphValues = [self.delegate valuesForGraph:self withWidth:width];
}
#end
And here's my view controller .h:
#import <UIKit/UIKit.h>
#import "GraphView.h"
#interface GraphingViewController : UIViewController <GraphViewDelegate>
#property (weak, nonatomic) IBOutlet GraphView *graphView;
#property (strong, nonatomic) IBOutlet UIStepper *stepper;
- (IBAction) changedScale:(UIStepper *)stepper;
#property (nonatomic) int scale;
#property (nonatomic) id expressionCopy;
#end
And here's the .m for the controller:
#import "GraphingViewController.h"
#interface GraphingViewController ()
#end
#implementation GraphingViewController
#synthesize expressionCopy = _expressionCopy;
- (void)updateUI
{
self.stepper.value = self.scale;
[self.graphView setNeedsDisplay];
}
- (void)setScale:(int)scale
{
if (scale < 0) scale = 0;
if (scale > 100) scale = 100;
_scale = scale;
[self updateUI];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(IBAction)changedScale:(UIStepper *)stepper {
self.scale = stepper.value; //this function works fine, but is not delegate/does not get called by view
}
-(float) scaleForGraph:(GraphView *)requestor {
NSLog(#"HI"); //never gets here
}
-(NSMutableDictionary*) valuesForGraph:(GraphView *)requestor withWidth:(float) width {
NSLog(#"Hello2"); //never gets here
}
return xyVals;
}
#end
Nowhere in the code you've posted do you tell your GraphView that the GraphingViewController is it's delegate. So, you are sending a message to nil.
You'll want to do something like:
self.graphView.delegate = self;
In your GraphingViewController setup code.
Make your controller actual delegate of GraphView. You can do it in interface builder by Ctrl-dragging from GraphView to the object (orange circle in the bottom) and than choose "delegate"