Question

I basically want to use the PlacardView.m and PlacardView.h from the Apple’s MoveMe example, by adding it as a subview on my main BlowViewController

PlacardView.m

#import "PlacardView.h"

@implementation PlacardView

@synthesize placardImage;



- (id)init {
    // Retrieve the image for the view and determine its size
    UIImage *image = [UIImage imageNamed:@"Placard.png"];
    CGRect frame = CGRectMake(0, 0, image.size.width, image.size.height);

    // Set self's frame to encompass the image
    self = [self initWithFrame:frame];
    if (self) {
        self.opaque = NO;
        placardImage = image;
        }
    return self;
}


- (void)dealloc {
    [placardImage release];
    [super dealloc];
}





@end

PlacardView.h

@interface PlacardView : UIView {
    UIImage *placardImage;

}

@property (nonatomic, retain) UIImage *placardImage;

// Initializer for this object
- (id)init;

@end

This is my MicBlowViewController.h

#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <CoreAudio/CoreAudioTypes.h>

@class PlacardView;

@interface MicBlowViewController : UIViewController {
    AVAudioRecorder *recorder;
    NSTimer *levelTimer;
    double lowPassResults;

    PlacardView *placardView;
}


@property(nonatomic, retain) PlacardView *placardView;
- (void)setUpPlacardView;
- (void)levelTimerCallback:(NSTimer *)timer;

@end

This is the partial MicBlowViewController.m .. there is a function viewDidLoad but that has nothing to do with the views.. its simply a timer for audio recording so I am not pasting that

#import "MicBlowViewController.h"
#import "PlacardView.h"

@implementation MicBlowViewController

    - (id)initWithFrame:(CGRect)frame {

        self = [super initWithFrame:frame];
        if (self) {
            [self setUpPlacardView];
        }
        return self;
    }


    - (void)setUpPlacardView {
        // Create the placard view -- its init method calculates its frame based on its image
        PlacardView *aPlacardView = [[PlacardView alloc] init];
        self.placardView = aPlacardView;
        [aPlacardView release];
        placardView.center = self.center;
        [self addSubview:placardView];
    }

The error I get is “Property ‘center’ not found on object of type “MicBlowViewController *””

Please help.

Answer 1

Ayush, your code leaves me somewhat puzzled.

The code for your controller seems to have several problems.

A UIViewController does not have an initWithFrame method, but rather a standard init, or an initWithNibName:bundle: method if using an Interface Builder file.

I see you have copied and pasted code from Apple’s MoveMe example, however, bear in mind that the MoveMeView from which you have copied the code into your controller is actually a UIView and not a UIViewController.

Try this:

#import "MicBlowViewController.h"
#import "PlacardView.h"

@implementation MicBlowViewController

    - (void)viewDidLoad {

        [self setUpPlacardView];

        // Additonal code with your timer etc
    }


    - (void)setUpPlacardView {
        // Create the placard view -- its init method calculates its frame based on its image
        PlacardView *aPlacardView = [[PlacardView alloc] init];
        self.placardView = aPlacardView;
        [aPlacardView release];
        [self.view addSubview:placardView];
        self.placardView.center = self.view.center;
    }

You will probably also need to implement the loadView method of your MicBlowViewController.

You may want to check out View Programming Guide, as well as UIViewController class reference.