virantporwal virantporwal - 4 months ago 19
Objective-C Question

how can i make uiscrollview infinite in ios?

I want to scroll like that 1 2 3 1 2 3

I have some buttons suppose 10 which i want to show on endless scroll.

numbercolors=[[NSMutableArray alloc] init];

//total count of array is 49

numbercolors = [NSMutableArray arrayWithObjects:@"25",@"26",@"27",@"28",@"29",@"31",@"32",@"33",@"34",@"35", @"0",@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12",@"13",@"14",@"15",@"16",@"17",@"18",@"19",@"20",@"21",@"22",@"23",@"24",@"25",@"26",@"27",@"28",@"29",@"30",@"31",@"32",@"33",@"34",@"35", @"0",@"1",@"2",@"3",nil];

int x=2500;

for (NSInteger index = 0; index < [numbercolors count]; index++)
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

button.frame = CGRectMake(x ,0,29.0,77.0);

button.tag = index;

[button setTitle:[numbercolors objectAtIndex:index] forState:UIControlStateNormal];

[button addTarget:self action:@selector(didTapButton:)

forControlEvents:UIControlEventTouchUpInside];

[coloringScroll addSubview:button];

x=x+70+29;
}
[coloringScroll setContentSize:CGSizeMake(5000+ (29+70)*[numbercolors count], 1)];

[coloringScroll setContentOffset:CGPointMake(2500+(29+70)*11, 0)];


This is my code for make butttons on scrollview.

How can i set in - (void)scrollViewDidEndDecelerating:(UIScrollView *)sender this method for infinite scroll.

Please help me for that

Answer

Just need to do set setContentOffset count

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (scrollView.contentOffset.x > 2500+(29+70)*4 + ((29+70)*36)) {
        [scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x-((29+70)*36),  0)];  
    }
    if (scrollView.contentOffset.x < 2500+(29+70)*4){
       [scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x+((29+70)*36), 0)];
    }
}