why images in the Images.xcassets are not displayed?

Question

There are some image resources in my Images.xcassets. Recently they cannot be displayed in the app when testing in the iPhone/iPad devices.

I guess they are not copied to the Bundle when build and package. Then i check the Copy Bundle Resources in Build Phases. The Images.xcassets is in here. One weird situation is it works well in simulators, but failed in the real devices. For a clean test, every time i will delete the app and then run again.

Some of snippets are as below:

   UIButton *button_Share = [[UIButton alloc]initWithFrame:CGRectMake(13,33,64,20)];
    [button_Share setBackgroundColor:[UIColor clearColor]];
    [button_Share setUserInteractionEnabled:YES];
    [button_Share setImage:[UIImage imageNamed:@"share_btnM@2x.png"] forState:UIControlStateNormal];
    [button_Share addTarget:self action:@selector(click_Share) forControlEvents:UIControlEventTouchUpInside];
    [imageview_ButtonBg addSubview:button_Share];

    UIButton *button_AddTo = [[UIButton alloc]initWithFrame:CGRectMake(112,33,97,20)];
    [button_AddTo setBackgroundColor:[UIColor clearColor]];
    [button_AddTo setUserInteractionEnabled:YES];
    [button_AddTo setImage:[UIImage imageNamed:@"add_cart_btnM@2x.png"] forState:UIControlStateNormal];
    [button_AddTo addTarget:self action:@selector(click_AddToCart) forControlEvents:UIControlEventTouchUpInside];
    [imageview_ButtonBg addSubview:button_AddTo];

    UIButton *button_Buy = [[UIButton alloc]initWithFrame:CGRectMake(243,33,64,20)];
    [button_Buy setBackgroundColor:[UIColor clearColor]];
    [button_Buy setUserInteractionEnabled:YES];
    [button_Buy setImage:[UIImage imageNamed:@"buynow_btnM@2x.png"] forState:UIControlStateNormal];
    [button_Buy addTarget:self action:@selector(click_Buy) forControlEvents:UIControlEventTouchUpInside];
    [imageview_ButtonBg addSubview:button_Buy];

images in the image set are as below: enter image description here

Any help would be appreciated.

"Recently they cannot be displayed in the app" How are you trying to display them? — matt, Jun 17 '15 at 06:36
Very strange... You are spelling the name the same as the name of the Image Set? Including the capitalization of that name? — matt, Jun 17 '15 at 06:43
@matt yes, it's strange... i thought maybe this is the bug of xcode, but i cannot figure out why. the name in the project is Images.xcassets, i will update the question. — chancyWu, Jun 17 '15 at 06:45
@matt image names are the same, because it works well in the simulator. almost all the images in the image set are disappeared. — chancyWu, Jun 17 '15 at 06:48
Can you show your code, and show a screen shot of an image set that is not working? — matt, Jun 17 '15 at 06:54

score 2 · Accepted Answer · answered Jun 17 '15 at 07:07

2

The problem is that you have not understood the principle of asset catalogs. They give to their assets the names of the image sets. You no longer use the old size-based image names. That is the whole point of asset catalogs! You use one name and the right asset is chosen for you, appropriate to your hardware.

Thus, for example, this call is wrong:

[UIImage imageNamed:@"share_btnM@2x.png"]

Your image set is called share_btnM, so you would say simply:

[UIImage imageNamed:@"share_btnM"]

You need to go through all your code, find all your imageNamed: calls, and fix that everywhere. Then your images will work.

answered Jun 17 '15 at 07:07

matt

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You are correct. But could you kindly explain why simulator works? – chancyWu Jun 17 '15 at 07:09
:) Because the old bundle-based images are still present in the simulator build. If you clean your caches and reset your simulators, as I explain [here](http://stackoverflow.com/questions/5714372/how-to-empty-caches-and-clean-all-targets-xcode-4/6247073#6247073), your simulators will stop working too! – matt Jun 17 '15 at 07:11

why images in the Images.xcassets are not displayed?

1 Answers1