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Cordell Key
1,130 PointsProgramming a Background Image (Help!)
Hi - Im keep getting the following ERROR message "Missing '[' at start of message send expression" where I'm creating an instance of UIImage View. Please see my code example below:
UIImage * image[UIImage imageNamed:@ "background.png"]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; [self.view addSubview:imageView];
Any thoughts on what might be missing or incorrect?
Thanks
3 Answers
Peter Pult
8,095 PointsLooks like you missed a = sign in your first line.
Change
UIImage * image[UIImage imageNamed:@ "background.png"];
To
UIImage * image = [UIImage imageNamed:@ "background.png"];
Kyle Jablonski
10,159 PointsUIImage *image = [UIImage imageNamed:@"background.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[self.view insertSubview:imageView atIndex:0];
You may want to add @synthesize imageView; to the top of your ViewController.m file and add this UIImageView as a property in the ViewController.h @property(strong, nonatomic) UIImageView *imageView; So that you can then use the following to make the background the image
UIImage *image = [UIImage imageNamed:@"background.png"];
*imageView = [[UIImageView alloc] initWithImage:image];
[self.view insertSubview:self.imageView atIndex:0];
Looks like your problem was the call to addSubview you need to insertSubview at the base index.
Cordell Key
1,130 PointsKyle Jablonski - Thanks for replying to my message! I just took a quick look at your response and it looks like I'll need to make updates to the [self.view addSubview:imageView];, where the updated code would be [self.view insertSubview:imageView atIndex:0];
However I'm a little lost on (A) adding @synthesize image view to the View Controller.m and (B) Adding UIImage View as property in the View Controller.h @property (strong, nonatomic) UIImageView *imageView;
Sorry, I'm still a novice at developing in IOS......any help you can provide will be most appreciated.
Thank you
Kyle Jablonski
10,159 PointsYeah, after posting that i realized i would probably have confused you a little. But using @synthesize will save you time in the long run. Take a look at it in the documentation when you have a chance. But for your purposes you can ignore that comment, since its not your error.
Cordell Key
1,130 PointsUIImage * image[UIImage imageNamed:@ "background.png"];
Kyle Jablonski
10,159 PointsKyle Jablonski
10,159 PointsGood catch peter. For the purpose of this tutorial, I believe by using 'addSubview' the image would be laid on top of the other UI elements. Looks like there were a few bugs. Again, good catch.
Cordell Key
1,130 PointsCordell Key
1,130 PointsPeter Pult - Thank you so much for catching this error.....its always the most obvious things I seem to overlook!
Peter Pult
8,095 PointsPeter Pult
8,095 PointsKyle Jablonski your method of using insertSubview is probably the safest option but if it's the first thing you add you end with the same result. Cordell Key it's always the small things...:)