从CGPoints数组设置按钮帧（仅x和y位置）

Question

1)I have an array of length 10 and named 'pointArrar'.This array contain CGPoints on its each index
2)Also I have 10 buttons.
Now I want to set Buttons frame(only x & y position) from array of CGPoints.
I just want to know how to set buttons x and y position from CGPoint contained in array.

Answer 1

Well its very logical.

Lets say your array is like

NSArray * pointArrar = [NSArray arrayWithObjects:
                     [NSValue valueWithCGPoint:CGPointMake(5.5, 6.6)],
                     [NSValue valueWithCGPoint:CGPointMake(7.7, 8.8)],
                     nil];

Then to add to your various buttons you need to simply put all the points into a loop like

for(int i=0; i<[pointArrar count] ; i++)
{
    NSValue *val = [pointArrar objectAtIndex:i];
    CGPoint p = [val CGPointValue];
    [Button setCenter:p];
}

Here all the points have been added to your button. Hope this works for you :)

Answer 2

As i understand you want to use NSArray and it do not store any structures. So you can you NSValue to wrap you points and to add them to array. Here is an example..

NSArray *points = [NSArray array];
// wrap your point using NSValue
NSValue *pointValue = [NSValue valueWithCGPoint:CGPointMake(x,y)];

[points addObject:pointValue];
/// ... add points

// get your point back...
CGPoint point = [[points objectAtIndex:index] CGPointValue];

button.frame = CGRectMake(point.x, point.y, button.frame.size.width, button.frame.size.height;