如何在“资源”文件夹中加载图像?

我在iPhone项目中有一个图片。这是一个PNG,我可以在InterfaceBuilder中设置背景,但我想通过编程来实现。

NSLog(@"Before %@", myEasterEgg);
uiImageBackground.backgroundColor = [UIColor purpleColor];
myEasterEgg = [myEasterEgg stringByAppendingString:@"5"];
NSLog(@"After %@", myEasterEgg);
if (CFStringCompare((CFStringRef)myEasterEgg, (CFStringRef)@"52235", 1) == 0) {
    myEasterEgg = @"";
    uiImageBackground.backgroundColor = [UIColor clearColor];
    [uiImageBackground setImage:[UIImage imageNamed:@"dock.png"]];
    uiImageBackground.image = image;
}
[myEasterEgg retain];
NSLog(@"After %@", myEasterEgg);

上面是我按钮上的代码。它不显示dock.png文件。

更新。我已经修改了代码,所以if语句将始终执行,但它仍然不加载图像。修改了下面的代码!

NSLog(@"Before %@", myEasterEgg);
uiImageBackground.backgroundColor = [UIColor purpleColor];
myEasterEgg = [myEasterEgg stringByAppendingString:@"5"];
NSLog(@"After %@", myEasterEgg);
    myEasterEgg = @"";
    uiImageBackground.backgroundColor = [UIColor clearColor];
    [uiImageBackground setImage:[UIImage imageNamed:@"dock.png"]];
    uiImageBackground.image = image;
[myEasterEgg retain];
NSLog(@"After %@", myEasterEgg);