UIScrollView 和 UIView
我想使用 UIScrollView 在用户滚动 UIScrollView 控件时显示多个 UIView。我还不担心显示分页。
我已经设法实现了其中的一些,但没有按照我想要的方式工作。
目前:
我有 3 个具有不同 nib 文件的 ViewController。根视图控制器是带有 UIScrollView 的控制器,它用于加载其余视图控制器。
NSMutableArray *controllers = [[NSMutableArray alloc] init];
for (unsigned i = 0; i < kNumberOfPages; i++) {
[controllers addObject:[NSNull null]];
}
self.viewControllers = controllers;
[controllers release];
scrollView.pagingEnabled = YES;
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * kNumberOfPages, scrollView.frame.size.height);
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = NO;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
pageControl.numberOfPages = kNumberOfPages;
pageControl.currentPage = 0;
[self loadScrollViewWithPage:0];
- (void)loadScrollViewWithPage:(int)page {
if (page == 0) {
PageTwo *controller2 = [viewControllers objectAtIndex:page];
if ((NSNull *)controller2 == [NSNull null]) {
controller2 = [[PageTwo alloc] initWithPageNumber:page];
[viewControllers replaceObjectAtIndex:page withObject:controller2];
[controller2 release];
}
// add the controller's view to the scroll view
if (nil == controller2.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
controller2.view.frame = frame;
[scrollView addSubview:controller2.view];
}
}
if (page == 1) {
// replace the placeholder if necessary
NewController *controller = [viewControllers objectAtIndex:page];
if ((NSNull *)controller == [NSNull null]) {
controller = [[NewController alloc] initWithPageNumber:page];
[viewControllers replaceObjectAtIndex:page withObject:controller];
[controller release];
}
// add the controller's view to the scroll view
if (nil == controller.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
controller.view.frame = frame;
[scrollView addSubview:controller.view];
}
}
没关系...但是,我想要它做的是首先加载根笔尖。但我不知道该怎么做。我知道我必须将页面数增加到 3,但是当我初始化控制器时,我不知道如何告诉它 page == 0 应该是当前视图。
有什么想法吗?
更新:
叹息,我忽略了一些东西..没有注意到,如果不指定级别 0 的页面,它只会显示当前视图哈哈!
愚蠢的我。
I want to use a UIScrollView to display multiple UIViews as the user scrolls through the UIScrollView control. I'm not worried about showing Pagination just yet.
I already managed to implement some of it, but is not working the way I want it to.
Currently:
I have 3 ViewControllers with different nib files. The root view controller is the one with the UIScrollView, and it to load the rest of the view controllers.
NSMutableArray *controllers = [[NSMutableArray alloc] init];
for (unsigned i = 0; i < kNumberOfPages; i++) {
[controllers addObject:[NSNull null]];
}
self.viewControllers = controllers;
[controllers release];
scrollView.pagingEnabled = YES;
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * kNumberOfPages, scrollView.frame.size.height);
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = NO;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
pageControl.numberOfPages = kNumberOfPages;
pageControl.currentPage = 0;
[self loadScrollViewWithPage:0];
- (void)loadScrollViewWithPage:(int)page {
if (page == 0) {
PageTwo *controller2 = [viewControllers objectAtIndex:page];
if ((NSNull *)controller2 == [NSNull null]) {
controller2 = [[PageTwo alloc] initWithPageNumber:page];
[viewControllers replaceObjectAtIndex:page withObject:controller2];
[controller2 release];
}
// add the controller's view to the scroll view
if (nil == controller2.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
controller2.view.frame = frame;
[scrollView addSubview:controller2.view];
}
}
if (page == 1) {
// replace the placeholder if necessary
NewController *controller = [viewControllers objectAtIndex:page];
if ((NSNull *)controller == [NSNull null]) {
controller = [[NewController alloc] initWithPageNumber:page];
[viewControllers replaceObjectAtIndex:page withObject:controller];
[controller release];
}
// add the controller's view to the scroll view
if (nil == controller.view.superview) {
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
controller.view.frame = frame;
[scrollView addSubview:controller.view];
}
}
That's all fine... However, what I want it to do is to load the root nib first. But I'm not sure how to go about this. I know I have to increase the number of pages to 3, but when I initialize the controllers I don't know how to tell it that page == 0 should be the current view.
Any ideas?
Update:
Sigh, I overlooked something.. Didn't notice that if don't specify a page at level 0 it just shows the current view hah!
Silly me.
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我忽略了一些东西..没有注意到如果不指定级别 0 的页面它只会显示当前视图哈哈!
I overlooked something.. Didn't notice that if don't specify a page at level 0 it just shows the current view hah!