How to change image for UIButton using switch statement? - ios

Question

I was able to add a "setbackgroundimage" to my UIButton in my array. Now all buttons have the same image. How do I create a switch statement to be able to set a different image for each initwithobjects #"" in my NSarray?
Below is the code I'm using:
menuItems = [[NSArray alloc]initWithObjects:#"",#"",#"",#"",#"",#"",#"", nil];
for (int b=0;b<[menuItems count];b++) {
UIButton *mybutton = [[UIButton alloc]initWithFrame:CGRectMake(3.0f, originofButtons, buttonWidth, buttonHeight)];
//mybutton.backgroundColor = [UIColor redColor];
[mybutton setBackgroundImage:[UIImage imageNamed:#"menubutton.png"]
forState:UIControlStateNormal];
[mybutton setTag:b];
[mybutton setTitle:[menuItems objectAtIndex:b] forState:UIControlStateNormal];
[mybutton setSelected:false];
[mybutton addTarget:self action:#selector(buttonpress:) forControlEvents:UIControlEventTouchUpInside];
[m_scrollview addSubview:mybutton];
originofButtons += (buttonHeight + buttonseparator);
}

Answer 1

To set the image for selected:
[mybutton setBackgroundImage:[UIImage imageNamed:#"YOUR_SELECTED_IMG.png"] forState:UIControlStateSelected];
Whereas you want to set different each, you can link tag .
switch (myButton.tag) {
case 0:
[mybutton setBackgroundImage:[UIImage imageNamed:#"YOUR_SELECTED_IMG.png"] forState:UIControlStateSelected];
break;
case 1:
[mybutton setBackgroundImage:[UIImage imageNamed:#"YOUR_SELECTED_IMG.png"] forState:UIControlStateSelected];
break;
}

Answer 2

This can be help you for your scenario.
You can add your button image name in NSArray and then set image for each case using the below code snippet:
NSArray* menuItems = [[NSArray alloc]initWithObjects:#"FirstScreen",#"SecondScreen",#"ThridScreen", nil];
for (int b=0;b<[menuItems count];b++) {
UIButton *mybutton = [[UIButton alloc]init ];//WithFrame:CGRectMake(3.0f, originofButtons, buttonWidth, buttonHeight)];
[mybutton setBackgroundImage:[UIImage imageNamed:[menuItems[b] stringByAppendingString:#".png"]] forState:UIControlStateSelected];

Answer 3

i am hoping this will be helpful to you according to your requirements.....
menuItems = [[NSArray alloc]initWithObjects:#"",#"",#"",#"",#"",#"",#"", nil];
for (int b=0;b<[menuItems count];b++) {
UIButton *mybutton = [[UIButton alloc]initWithFrame:CGRectMake(3.0f, originofButtons, buttonWidth, buttonHeight)];
//mybutton.backgroundColor = [UIColor redColor];
[mybutton setBackgroundImage:[self getImageFromIndex:b %4]
forState:UIControlStateNormal];
[mybutton setTag:b];
[mybutton setTitle:[menuItems objectAtIndex:b] forState:UIControlStateNormal];
[mybutton setSelected:false];
[mybutton addTarget:self action:#selector(buttonpress:) forControlEvents:UIControlEventTouchUpInside];
[m_scrollview addSubview:mybutton];
originofButtons += (buttonHeight + buttonseparator);
}
-(UIImage *) getImageFromIndex:(short) index
{
switch (index) {
case 0:
return [UIImage imageNamed:#"card_01.png"];
break;
case 1:
return [UIImage imageNamed:#"card_02.png"];
break;
case 2:
return [UIImage imageNamed:#"card_03.png"];
break;
case 3:
return [UIImage imageNamed:#"card_04.png"];
break;
default:
return [UIImage imageNamed:#"card_01.png"];
break;
}
return nil;
}