UIImage imageNamed requires pathForResource?

Question

How necessary is it to search for a path to an image using the NSBundle method pathForResource when creating a UIImage using ima

Answer 1

I created a new Xcode project (single view, AppDelelgate, ViewController class, storyboard etc ). Created an Images group. Used Paintbrush to create a 16x16 png file Wall1.png and dropped it into the Images group in Xcode (let Xcode copy the files).

In the ViewController viewDidLoad method added the code:

UIImageView* imageView=[[UIImageView alloc] initWithFrame:CGRectMake(50, 100, 16, 16)];
UIImage *image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"Images/Wall1" ofType:@"png"]];
imageView.image = image;
    UIImageView* imageView=[[UIImageView alloc] initWithFrame:CGRectMake(50, 100, 16, 16)];
UIImage *image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"Wall1" ofType:@"png"]];
imageView.image = image;
[self.view addSubview:imageView];

Ran the app on my phone, the image would not appear

Added a break point at [self.view addSubview:imageView];

image was null

Opened terminal and changed directory to my project, Wall1.png was not a group folder Images. Removed the png from the project, created a Images folder, moved Wall1.png into the folder. Added the existing file Wall1.png to the group Images.

Ran the app, the image still doesn't appear.

image was null

Changed Images/Wall1 to Wall1

Ran the app, boom image is displayed1

If you create a group for your images, Xcode does not create a respective directory. Create one manually if you want to (I prefer to keep my images in a seperate folder). Dont specify the full path to your image file when using UIImage imageWithContentsOfFile.