Objective c 当UIScrollView充满更多内容时扩展它

好的，当用户登录到我的应用程序时，我得到了一个要加载的scrollview。当用户通过身份验证时，我需要以编程方式创建一个scrollview。为此，我有以下代码：

[scrollView removeFromSuperview];

        UIScrollView *view = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, applicationFrame.size.width, self.view.frame.size.height)];
        view.backgroundColor = [UIColor greenColor];


        //-- get the y-coordinate of the view
        CGFloat viewCenterY = self.view.center.y;
        //--calculate how much visible space is left
        CGFloat freeSpaceHeight = applicationFrame.size.height - keyboardBounds.size.height;
        //-- calculate how much the scrollview must scroll
        CGFloat scrollAmount = viewCenterY - freeSpaceHeight / 2.0;

        if(scrollAmount < 0) scrollAmount = 0;

        //set the new scrollsize contentview
        view.contentSize = CGSizeMake(applicationFrame.size.width,         applicationFrame.size.height + keyboardBounds.size.height);

        //scroll the scrollview
        [view setContentOffset:CGPointMake(0, scrollAmount) animated:YES];

            for(int v = 0; v < 15; v++){
                CGFloat yCoord = v * 100;
                UILabel *mijnLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, yCoord, 200, 50)];

                mijnLabel.text = @"1337";
                mijnLabel.font = [UIFont fontWithName:@"Verdana" size:20];
                mijnLabel.textColor = [UIColor redColor];

                [view addSubview:mijnLabel];
                [mijnLabel release];
            }


            [self.view addSubview:view];

            [view release];


        }

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您需要跟踪添加到滚动视图中的标签编号。假设标签的高度为50，则取一个变量，合计所有标签的高度，并为滚动视图提供一个新的帧。比如：

        view.frame = CGRectmake(0,0,applicationFrame.size.width,totalHeightOfLabel);
        [self.view addSubview:view];

        [view release];

希望这能给你一个想法

        view.frame = CGRectmake(0,0,applicationFrame.size.width,totalHeightOfLabel);
        [self.view addSubview:view];

        [view release];