assign image to image view

[cabhara]

Hi,

I'm trying to display an image dynamically and it only works if I make
a sub view. Is that necessary?
Why does it not work to assign the image only?
Does not work:
UIImage *labelImage = [UIImage imageNamed:@"test.png"];
[self.myImageView initWithImage:labelImage];

works:
UIImageView *tmp = [[UIImageView alloc] initWithImage:[UIImage
imageNamed:@"test.png"]];
[self.myImageView addSubview:tmp];
[tmp release];

Thanks
Christina

[Vaish]

hi...

i ran into an almost similiar issue some time ago.Try this code:

UIImage *labelImage = [UIImage imageWithContentsOfFile:[[NSBundle
mainBundle] pathForResource:@"test" ofType:@"png"]

Do post back if you are stuck again.

Thanks

[David Phillip Oster]

The line: [self.myImageView initWithImage:labelImage]; can never
possibly be correct.

If you expand it out into traditional syntax, it would be:
[self setImageView:[[self imageView] initWithImage:labelImage]];

1.) One only sends init to a freshly alloc'ed object, so the inner
part should be:
[[[UIImageView alloc] initWithImage:labelImage] autorelease]

2.) assigning to your imageView field doesn't change the view
hierarchy. You'd need to remove the old imageView and insert the new
one in the same place.

3.) You probably meant:
NSAssert(self.myImageView, @"");
self.myImageView.image = labelImage;

which just changes the image retained by the imageView, but it assumes
that the imageView already exists.
The NSAssert will dumo you into the debugger if myImageView is nil.

-- David Phillip Oster

[cabhara]

what I'm doing right now is the following, and it is working ok so
far.... I will give the direct assignment a try.

//remove existing sub views
NSArray *myviews = [self.myImageView subviews];
if ([myviews count]>0) {
[[myviews objectAtIndex:0] removeFromSuperview];
}

NSString *imageName=.... //determines image name

//assign image to temporary view

UIImageView *tmp = [[UIImageView alloc] initWithImage:[UIImage

imageNamed:imageName]];

//add temp view as sub view

[self.myImageView addSubview:tmp];
[tmp release];

On Nov 24, 3:54 pm, David Phillip Oster <davidphillipos...@gmail.com>
wrote:

[cabhara]

hmm. looks like this is working and much easier than what I did.

NSString *imageName=... //get image name

self.myImageView.image = [UIImage imageNamed:imageName];


but somehow the pictures are less clear than when using the sub view.

probably has to do with the the sizing and other settings....

Christina

On Nov 24, 3:54 pm, David Phillip Oster <davidphillipos...@gmail.com>
wrote:

[iDeveloper]

Avoid using imageNamed: as far as possible. That is one of the worst
methods available in terms of memory management.
If you want to us one of the convenience methods, try using
imageWithContentsOfFile:

UIImage *image = [UIImage imageWithContentsOfFile:[[[NSBundle
mainBundle] resourcePath]
stringByAppendingPathComponent:@"YourImage.jpg"]];
[myImageView setImage:image];

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