Programatically change custom UiButton background color - ios

Question

Within my custom UIButton class called "ComingHomeButton", I'm not able to change the backgroundcolor
I would like to change it without creating images, but if it is the only way I will have to.
I also want to change the background color every time the button is tapped.
Here is what I have that doesnt work:
UIColor *color = [UIColor colorWithRed:1 green:1 blue:1 alpha:0.5];
[self setBackgroundColor:color];
self refers to my "ComingHomeButton"
Thank you so much :-)

Answer 1

You can create a counter, and then loop through colors when a button is tapped:
-(IBAction)buttonTapped:(id)sender {
if (!counter) {
counter = 0
}
if (counter%3 == 0) {
self.backgroundColor = [UIColor redColor]; //or whatever custom color you want to use
} else if (counter%3 == 1) {
self.backgroundColor = [UIColor blueColor];
} else if (counter%3 == 2) {
self.backgroundColor = [UIColor greenColor];
}
counter++
}
and you can add as many colors as you want to loop through. The % denotes the mod function, making sure that when counter is bigger than 2, it will still return a number between 0 and 2.
The number after the % is the number of colors to loop through.

Answer 2

UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(50, 50, 300, 100)];
btn.backgroundColor = [UIColor blueColor];
[self.view addSubview:btn];
The following code works fine for adding a button the a given view with a background button. Try using the dot notation instead of the message pass.

Answer 3

-(IBAction)buttonTapped:(id)sender {
sender.backgroundColor = [self randomColor];
}
-(UIColor *)randomColor
{
CGFloat red = arc4random() % 255 / 255.0;
CGFloat green= arc4random() % 255 / 255.0;
CGFloat blue= arc4random() % 255 / 255.0;
UIColor *color = [UIColor colorWithRed:red green:green blue:blue alpha:1.0];
return color;
}
I did not test the code I am not on my mac but it should work.