如何以编程方式创buildUIScrollView？
好的，所以这里的关键是我没有使用IB，因为我正在使用的视图是以编程方式创build的。 UIView覆盖屏幕的下半部分，并在其上有一堆button。 但是，我想添加更多的button到UIView ，而不是更大。 为此，我想在视图中创build一个UIScrollView ，这将允许我在屏幕上添加更多button，以便用户可以滚动到它们。 我认为这是如何工作的。
self.manaView = [[[UIView alloc] initWithFrame:frame] autorelease]; self.manaView.backgroundColor = [UIColor purpleColor]; UIScrollView *scroll = [UIScrollView alloc]; scroll.contentSize = CGSizeMake(320, 400); scroll.showsHorizontalScrollIndicator = YES; [self.manaView addSubview:scroll];
代码的第一部分介绍了我的UIView ，这很好，但我不知道如何编程UIScrollView并将其添加到视图，然后将button添加到它。
UIButton *ret2 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; ret2.tag = 102; ret2.frame = CGRectMake(255, 5, 60, 50); [ret2 setTitle:@"Return" forState:UIControlStateNormal]; [ret2 addTarget:self action:@selector(flipAction:) forControlEvents:UIControlEventTouchUpInside]; [scroll addSubview:ret2];
当我这样做，button简单地消失在我的屏幕上。 那么我如何正确地做到这一点？ 感谢您的帮助！
代替：
UIScrollView *scroll = [UIScrollView alloc];
做到这一点（设置框架，不pipe你想要滚动视图）：
UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:...];
这可能有助于您以编程方式创builduiscrollview
http://unconditionalloop.blogspot.com/2011/04/uiscrollview-programmatically.html
UIScrollView *scrollview = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; NSInteger viewcount= 4; for(int i = 0; i< viewcount; i++) { CGFloat y = i * self.view.frame.size.height; UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, y,self.view.frame.size.width, self .view.frame.size.height)]; view.backgroundColor = [UIColor greenColor]; [scrollview addSubview:view]; [view release]; } scrollview.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height *viewcount); [self.view addSubview:scrollview];
尝试这个，
{ scrollview=[[UIScrollView alloc]initWithFrame:CGRectMake(0,0,320,480)]; scrollview.showsVerticalScrollIndicator=YES; scrollview.scrollEnabled=YES; scrollview.userInteractionEnabled=YES; [self.view addSubview:scrollview]; scrollview.contentSize = CGSizeMake(width,height); [scrollview release]; }
创build一个UiScrollView Programitically
ScrView = [[UIScrollView alloc]initWithFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height)]; ScrView.showsVerticalScrollIndicator=YES; [ScrView setBackgroundColor:[UIColor yellowColor]]; [ScrView setScrollEnabled:YES]; [ScrView setContentSize:CGSizeMake(0, 700)]; [ScrView setShowsHorizontalScrollIndicator:YES]; [ScrView setShowsVerticalScrollIndicator:YES]; [self.view addSubview:ScrView];
简单的方法：你可以创build多次，如果你需要的手段
- (void)viewDidLoad { [super viewDidLoad]; int x = 0; int y = 10; for(int i=0; i<5; i++) { UIScrollView *scrollview=[[UIScrollView alloc]initWithFrame:CGRectMake(x, y, 50, 50)]; scrollview.showsVerticalScrollIndicator=YES; scrollview.scrollEnabled=YES; scrollview.userInteractionEnabled=YES; scrollview.backgroundColor = [UIColor greenColor]; [self.view addSubview:scrollview]; //scrollview.contentSize = CGSizeMake(50,50); x=x+55; //[self myscrollView]; } }
以编程方式创buildUI时，我使用了很多lazyfunction，如下所示：
class WorldViewController: UIViewController { override func loadView() { super.loadView() view = scrollView scrollView.addSubview(label0) } lazy var scrollView: UIScrollView = { let instance = UIScrollView() instance.backgroundColor = UIColor.blackColor() return instance }() lazy var label0: UILabel = { let instance = UILabel() instance.text = "Ice caps are melting" instance.textColor = UIColor.whiteColor() instance.sizeToFit() return instance }() var needLayoutContent = true override func viewDidLayoutSubviews() { super.viewDidLayoutSubviews() if needLayoutContent { let bounds = scrollView.bounds let contentSize = CGSizeMake(bounds.width * 1.5, bounds.height * 1.5) label0.center = CGPointMake(contentSize.width / 2, contentSize.height / 2) scrollView.contentSize = contentSize scrollView.contentOffset = CGPointMake(bounds.width * 0.25, bounds.height * 0.25) needLayoutContent = false } } }
