iphone - 在 UIScrollView 上添加 UITextView/UILabel

Question

我正在尝试添加一个UITextView. UIScrollview然后添加UIScrollView到UIView. 将 scrollView 添加到UIView有效但添加UITextView到 aUISCrollView不起作用。任何指针？

谢谢

UIScrollView * contentScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(300, 400, 250, 250)];
contentScrollView.backgroundColor = [UIColor whiteColor];
UITextView * mainContent = [[UITextView alloc]initWithFrame:CGRectMake(300, 400, 200, 200)];
mainContent.text = @"HELLO";
mainContent.textColor = [UIColor blackColor];
[contentScrollView addSubview:mainContent];
[contentScrollView setUserInteractionEnabled:YES];
[contentView addSubview:contentScrollView];

Answer 1

你的滚动视图的高度是 250，宽度也是 250。但是你给 textview 的框架超出了这些限制，即 300 和 400。将它们限制在 250、250 之类的

UITextView * mainContent = [[UITextView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];

Answer 2

使用此代码：

UIScrollView * contentScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 50, 320, 270)];
contentScrollView.backgroundColor = [UIColor whiteColor];
[contentScrollView setUserInteractionEnabled:YES];    

UITextView * mainContent = [[UITextView alloc]initWithFrame:CGRectMake(60, 30, 200, 200)];
mainContent.text = @"HELLO";
mainContent.textColor = [UIColor blackColor];

[contentScrollView addSubview:mainContent];        
[self.view addSubview:contentScrollView];

Answer 3

使用这种技术

UIScrollView * contentScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 50, 320, 270)];

并将其添加到您的UIScrollView喜欢中：

UITextView * mainContent = [[UITextView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];
contentScrollView.backgroundColor = [UIColor whiteColor];
[contentScrollView setUserInteractionEnabled:YES];    
[contentScrollView addSubview:mainContent];