Undeclared identifier "viewDidLoad" - ios

Question

//Objects list
//objects scroll
UIScrollView *objects;
objects=[[UIScrollView alloc]initWithFrame:CGRectMake(0,80,512,688)];
objects.showsVerticalScrollIndicator=YES;
objects.scrollEnabled=YES;
objects.userInteractionEnabled=YES;
objects.backgroundColor = [UIColor clearColor];
[self.view addSubview:objects];
[objects setUserInteractionEnabled:YES];
[objects setCanCancelContentTouches:YES];
objects.contentSize = CGSizeMake(512,689);
//divider
UIButton *divider = [UIButton buttonWithType:UIButtonTypeCustom];
[divider setBackgroundImage:[UIImage imageNamed:#"white.png"]forState:UIControlStateNormal];
divider.frame = CGRectMake(300, 0, 1, 768);
[divider setTitle:#"" forState:UIControlStateNormal];
[self.view addSubview:divider];
divider.adjustsImageWhenHighlighted = NO;
//array colors
UIImage *color[3000];
//color setup
color[0] = [UIImage imageNamed:#"item.png"];
UIImageView *originalImageView = [[UIImageView alloc] initWithImage:color[0]];
[originalImageView setFrame:CGRectMake(300, 0, 212, 62)];
[objects addSubview:originalImageView];
//array buttons
UIImageView *button[3000];
//button setup
button[0] = [[UIView alloc] initWithFrame:[originalImageView frame]];
UIImageView *maskImageView = [[UIImageView alloc] initWithImage:color[0]];
[maskImageView setFrame:[button[0] bounds]];
[[button[0] layer] setMask:[maskImageView layer]];
button[0].backgroundColor = [UIColor blueColor];
[objects addSubview:button[0]];
//add object button
UIButton *plus = [UIButton buttonWithType:UIButtonTypeCustom];
[plus setBackgroundImage:[UIImage imageNamed:#"plus.png"]forState:UIControlStateNormal];
plus.frame = CGRectMake(394, 106, 25, 25);
[plus setTitle:#"" forState:UIControlStateNormal];
[objects addSubview:plus];
plus.adjustsImageWhenHighlighted = YES;
-(void)viewDidLoad {
[super viewDidLoad];
UIButton *add = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[add addTarget:self action:#selector(aMethod:)forControlEvents:UIControlEventTouchDown];
[add setTitle:#"add new" forState:UIControlStateNormal];
add.frame = CGRectMake(100, 100, 100, 100);
[self.view addSubview:add];
}
- (void) aMethod:(id)sender {
button[0].backgroundColor = [UIColor greenColor];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Here is the updated code, some before, and everything after. There's a lot more to the program but it is all just setting up different visual elements for a GUI. The error is tagged on the line that sais..
-(void)viewDidLoad {
And the error sais this..
Use of undeclared identifier 'viewDidLoad'
Would you like more info??

Answer 1

you cannot have method inside another method.
this is part of your code
//add object button
UIButton *plus = [UIButton buttonWithType:UIButtonTypeCustom];
[plus setBackgroundImage:[UIImage imageNamed:#"plus.png"]forState:UIControlStateNormal];
plus.frame = CGRectMake(394, 106, 25, 25);
[plus setTitle:#"" forState:UIControlStateNormal];
[objects addSubview:plus];
plus.adjustsImageWhenHighlighted = YES;
-(void)viewDidLoad {
[super viewDidLoad];
UIButton *add = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[add addTarget:self action:#selector(aMethod:)forControlEvents:UIControlEventTouchDown];
[add setTitle:#"add new" forState:UIControlStateNormal];
add.frame = CGRectMake(100, 100, 100, 100);
[self.view addSubview:add];
}
- (void) aMethod:(id)sender {
button[0].backgroundColor = [UIColor greenColor];
}
} // <----this should not be here
change it to
//add object button
UIButton *plus = [UIButton buttonWithType:UIButtonTypeCustom];
[plus setBackgroundImage:[UIImage imageNamed:#"plus.png"]forState:UIControlStateNormal];
plus.frame = CGRectMake(394, 106, 25, 25);
[plus setTitle:#"" forState:UIControlStateNormal];
[objects addSubview:plus];
plus.adjustsImageWhenHighlighted = YES;
} // <--- should be here to end method
-(void)viewDidLoad {
[super viewDidLoad];
UIButton *add = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[add addTarget:self action:#selector(aMethod:)forControlEvents:UIControlEventTouchDown];
[add setTitle:#"add new" forState:UIControlStateNormal];
add.frame = CGRectMake(100, 100, 100, 100);
[self.view addSubview:add];
}
- (void) aMethod:(id)sender {
button[0].backgroundColor = [UIColor greenColor];
}