Need help displaying an image based off UIPicker Selection

[lukeirvin]

- (void)viewDidLoad
{
[super ViewDidLoad];

[brandTextField addTarget:self action:@selector(showImageFromFilter) forControlEvents:UIControlEventAllEvents];
}


- (void)showImageFromFilter
{
if (brandTextField.text == @"Awake")
{
NSString * imageString = @"awake_top_purple.png";

UIImage * womenTopImage = [[UIImage alloc] initWithContentsOfFile:imageString];

womenTopImageView.image = [[UIImageView alloc] initWithImage:womenTopImage];

womenTopImageView.contentMode = UIViewContentModeScaleAspectFit;
}
}

Here is the general idea of what I am doing.

I have 3 TextFields, each connected to a UIPicker. I have three sets of arrays with values. When I have specific values set I'd like for an image to display below the UITextFields.

This is what I am trying but doesn't seem to be working. Am I on the right track or can someone explain how I can get this to work.


Thanks

[lukeirvin]

I changed the == to isEqualToString

Still not working though


Should I be calling this method in viewDidLoad or didSelectRow?

[baja_yu]

Please use [code] tags when posting source code.

Aside from the == problem when comparing objects, you are also leaking the image 'womenTopImage', and you're leaking the imageview you create on the next line. But more importantly, you are trying to assign an imageview object, to an image property of another imageview. Compiler should have at least given you a warning there, and you'd get a crash when that code is executed.

[lukeirvin]

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImageView scale]: unrecognized selector sent to instance 0x4b393c0'

I've been getting this warning a lot but can't find a solution for it.

I'm getting it at this line:

womenTopImageView.image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"awake_top_purple.png"]];

[baja_yu]

Read the last two sentences of my post again.

For future reference, when you get a crash and ask for assistance, it helps others a lot that want to help you if you post the details of the crash up front.

[lukeirvin]

- (void)showImageFromFilter
{
if ([brandTextField.text isEqualToString:@"Awake"])
{
womenTopImageView.image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"awake_top_purple.png"]];
womenTopImageView.contentMode = UIViewContentModeScaleAspectFit;
[womenTopImageView release];
}
}

This is what I am trying now. I can't see what I am over looking though with the image object.

[baja_yu]

Again, [code] tags, please!

womenTopImageView.image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"awake_top_purple.png"]];

And you're still leaking the imageview object you allocated and never released.

[lukeirvin]

I thought I was releasing that though. I don't understand what needs to be released.

[baja_yu]

You need to read the Memory Management Programming Guide: Loading… In short everything you copy, alloc, retain or new, you must release. But do read the guide, and as many times as you need until you fully understand it. Concepts explained there are absolutely a must-know.

In your code you were releasing womenTopImageView, but that's even worse since you weren't setting it, but it's image property. UIImage is not the same as UIImageView. Instead of assigning an imageview to the image property, you need to assign a UIImage to it.

[lukeirvin]

if ([brandTextField.text isEqualToString:@"Awake"] && [colorTextField.text isEqualToString:@"Purple"])    
    {
        womenTopImageView.frame = CGRectMake(70, 150, 214, 253);
        
        image = [UIImage imageNamed:@"awake_top_purple.png"];
        womenTopImageView = [[UIImageView alloc] initWithImage:image];
        
        womenTopImageView.contentMode = UIViewContentModeScaleAspectFit;
        
        [self.view addSubview:womenTopImageView];
                
        [womenTopImageView release];
        [image release];
    }

I'm getting closer! The image displays now but it's showing up in the top left corner of the view. It's not placing the image in the UIViewController I have in the view. Just have to figure out how to position the image and it's good to go!

Thanks for the help!

[baja_yu]

You do it by setting the 'frame' property of the imageview.