如何在单击按钮的过程中在滚动视图中添加数组元素

Question

我想在点击按钮的过程中添加滚动视图中的元素。。如果元素添加意味着滚动视图想要变大。取决于滚动视图中添加的元素。。当我单击按钮时，应该在scrollview中一个接一个地添加这些元素。。

Answer 1

在视图控制器中维护一个height index，比如

float = scrollViewheight;

当添加任何对象时，比如将UILabel添加到scrollView，然后像这个一样添加increase scrollViewheight

UILabel *lblText = [UILabel new];
lblText.frame = CGRectMake(20,20,280,22);
[scrollView addSubview:lblText];
//update scrollViewheight
scrollViewheight = lblText.frame.origin.y+lblText.frame.size.height;
//update scrollView's content size
[scrollView setContentSize:CGSizeMake(0,scrollViewheight);

添加new object时使用scrollViewheight

UILabel *lblText1 = [UILabel new];
lblText1.frame = CGRectMake(20,scrollViewheight+20,280,22);
[scrollView addSubview:lblText1];
//update scrollViewheight
scrollViewheight = lblText1.frame.origin.y+lblText1.frame.size.height;
//update scrollView's content size
[scrollView setContentSize:CGSizeMake(0,scrollViewheight);

编辑：刚刚格式化的

Answer 2

您可以使用[self.scroll addSubview:myView]添加UIView元素，并相应地调整内容大小。

Answer 3

- (void)buttonClicked:(UIButton *)button {
    // adds new view to scrollView
    [self.scrollView addSubview:anotherView];
    int padding = 10;
    // set scrollView content size
    [self.scrollView setContentSize:CGSizeMake(self.scrollView.contentView.size.width, self.scrollView.frame.size.height + padding + anotherView.frame.size.height)]; 
    [self.scrollView setContentOffset:CGPointMake(0, anotherView.frame.origin.y) animated:YES]; // scrolls to new view
}

希望它能帮助