loop to set UIImages from document directory on viewDidLoad - ios

Question

I have 9 buttons whose images are set by the user dynamically. Each button's current image is saved the user documents folder. In viewDidLoad id like to re-set each image to it's UIButton.
I can do this easily enough with:
NSString *filePath = [self documentsPathForFileName: #"boss1.png"];
NSData *pngData = [NSData dataWithContentsOfFile:filePath];
UIImage *savedBoss = [UIImage imageWithData:pngData];
[boss1Button setImage:savedBoss forState:UIControlStateNormal];
...... 8 more times....
Of course Id prefer to do it using a loop. Only, Im not sure what that would look like in objective C. In jQuery I could do something like:
$('.bosses').each(function( index ) {
var imageUrl='../images/boss'+(index+1)
$('#'+this.id).css('background-image', 'url(' + imageUrl + ')')
});
How can I create a similar objective-C loop that would increment the boss image name and button name similarly?
Furthermore, is there a better way to do this entirely?
I feel like maybe having an NSArray of image urls and an NSArray of UIButton names and pairing them together using a loop might be better.... but again I'm not sure what the syntax would look like for that here.

Answer 1

Try like this and have button tag like 1 to 8
for (id subview in self.view.subviews) {
if([subview isKindOfClass:[UIButton class]]) {
UIButton* button = (UIButton*)subview;
NSString *filePath = [self documentsPathForFileName:[NSString stringWithFromate#"boss%d.png", button.tag]];
NSData *pngData = [NSData dataWithContentsOfFile:filePath];
UIImage *savedBoss = [UIImage imageWithData:pngData];
[button setImage:savedBoss forState:UIControlStateNormal];
}
}
This will do.

Answer 2

it will be like:
//Add all the buttons in an array for easy loop
NSArray *array = #[btn1,btn2,btn3,btn4... etc];
NSString *name = #"BOSS";
int x = 1;
for(UIButton *btn in array){ // loop through all the buttons
NSString *filePath = [self documentsPathForFileName:[NSString stringWithFormat:#"%#%d.png",name,x]];
NSData *pngData = [NSData dataWithContentsOfFile:filePath];
UIImage *savedBoss = [UIImage imageWithData:pngData];
[btn setImage:savedBoss forState:UIControlStateNormal];
x++;
}