ios - 在 for 循环中创建的 UIButtons 的特定位置

Question

我想创建 UIButtons 并将它们分隔在 UIScrollView 中，页面如下:

按钮将从左到右然后成行向下，直到到达 View 底部。然后它将转到 UIScrollView 的下一页并继续。

到目前为止，这是我的代码:

for(NSString *num in nums) {
        UIButton *test = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [test addTarget:self action:@selector(numPressed:) forControlEvents:UIControlEventTouchUpInside];
        test.frame = CGRectMake(0, 0, 70, 70);
        [self.view addSubview:test];
}

Answer 1

像这样的代码:

int xOff = 10;
int yOff = 50;
int btnGap = 20;
int page = 0;
for (NSString *num in nums) {
       xOff += page * _scrollView.width;
        for (int row = 0; row < 3; row++) {
             for (int col = 0; col < 3; col++) {
                UIButton *test = [UIButton buttonWithType:UIButtonTypeRoundedRect];
                [test addTarget:self action:@selector(numPressed:) forControlEvents:UIControlEventTouchUpInside];
                test.frame = CGRectMake(xOff+col*(70+btnGap) , yOff+row*(70+btnGap), 70, 70);
                test.backgroundColor = [UIColor redColor];
                [test setTitle:num forState:UIControlStateNormal];
                 [_scrollView addSubview:test];
           }
        }
        page++;
    }