原问题是,我要展现给用户的内容放在scrollview中,让内容从上到底自动滚动,我最开始用的是DDAutoscrollview,但是无法实现。一种解决方案见下边,更多解决方案见:http://ask.csdn.net/questions/374.h文件
@interface Interface1 : UIViewController { IBOutlet UIScrollView *scroller;
IBOutlet UILabel *warnung;}
@property (nonatomic, retain) IBOutlet UIScrollView* scrollView;
.m文件
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height);
[self.scrollView setContentOffset:bottomOffset animated:NO]; CGPoint newOffset = self.scrollView.contentOffset;
newOffset.y = 0;
[self.scrollView setContentOffset:newOffset animated:YES];
}- (void)viewDidLoad
{ [scroller setScrollEnabled:YES];
[scroller setContentSize:CGSizeMake(320, 420)]; [super viewDidLoad];
}使用setContentOffset:animated:UIScrollView *scrollView = ...;
CGPoint newOffset = scrollView.contentOffset;
newOffset.y = 0;
[scrollView setContentOffset:newOffset animated:YES];
如果需要开场动画的效果,在scrollView的viewcontroller实现- (void)viewDidLoad
{
[super viewDidLoad]; // ... CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height);
[self.scrollView setContentOffset:bottomOffset animated:NO];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated]; CGPoint newOffset = self.scrollView.contentOffset;
newOffset.y = 0;
[self.scrollView setContentOffset:newOffset animated:YES];
}
移动的慢点,用timer实现:- (void)viewDidLoad
{
[super viewDidLoad]; // ... CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height);
[self.scrollView setContentOffset:bottomOffset animated:NO];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated]; CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height); //设置延迟时间
float scrollDurationInSeconds = 4.0; //计算timer间隔
float totalScrollAmount = bottomOffset.y;
float timerInterval = scrollDurationInSeconds / totalScrollAmount; [NSTimer scheduledTimerWithTimeInterval:timerInterval target:self selector:@selector(scrollScrollView:) userInfo:nil repeats:YES];
}- (void)scrollScrollView:(NSTimer *)timer
{
CGPoint newScrollViewContentOffset = self.scrollView.contentOffset; //向上移动 1px
newScrollViewContentOffset.y -= 1;
newScrollViewContentOffset.y = MAX(0, newScrollViewContentOffset.y); //如果到顶了,timer中止
if (newScrollViewContentOffset.y == 0) {
[timer invalidate];
} //最后设置scollView's contentOffset
self.scrollView.contentOffset = newScrollViewContentOffset;
}
ios
@interface Interface1 : UIViewController { IBOutlet UIScrollView *scroller;
IBOutlet UILabel *warnung;}
@property (nonatomic, retain) IBOutlet UIScrollView* scrollView;
.m文件
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height);
[self.scrollView setContentOffset:bottomOffset animated:NO]; CGPoint newOffset = self.scrollView.contentOffset;
newOffset.y = 0;
[self.scrollView setContentOffset:newOffset animated:YES];
}- (void)viewDidLoad
{ [scroller setScrollEnabled:YES];
[scroller setContentSize:CGSizeMake(320, 420)]; [super viewDidLoad];
}使用setContentOffset:animated:UIScrollView *scrollView = ...;
CGPoint newOffset = scrollView.contentOffset;
newOffset.y = 0;
[scrollView setContentOffset:newOffset animated:YES];
如果需要开场动画的效果,在scrollView的viewcontroller实现- (void)viewDidLoad
{
[super viewDidLoad]; // ... CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height);
[self.scrollView setContentOffset:bottomOffset animated:NO];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated]; CGPoint newOffset = self.scrollView.contentOffset;
newOffset.y = 0;
[self.scrollView setContentOffset:newOffset animated:YES];
}
移动的慢点,用timer实现:- (void)viewDidLoad
{
[super viewDidLoad]; // ... CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height);
[self.scrollView setContentOffset:bottomOffset animated:NO];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated]; CGPoint bottomOffset = CGPointMake(self.scrollView.contentOffset.x, self.scrollView.contentSize.height - self.scrollView.bounds.size.height); //设置延迟时间
float scrollDurationInSeconds = 4.0; //计算timer间隔
float totalScrollAmount = bottomOffset.y;
float timerInterval = scrollDurationInSeconds / totalScrollAmount; [NSTimer scheduledTimerWithTimeInterval:timerInterval target:self selector:@selector(scrollScrollView:) userInfo:nil repeats:YES];
}- (void)scrollScrollView:(NSTimer *)timer
{
CGPoint newScrollViewContentOffset = self.scrollView.contentOffset; //向上移动 1px
newScrollViewContentOffset.y -= 1;
newScrollViewContentOffset.y = MAX(0, newScrollViewContentOffset.y); //如果到顶了,timer中止
if (newScrollViewContentOffset.y == 0) {
[timer invalidate];
} //最后设置scollView's contentOffset
self.scrollView.contentOffset = newScrollViewContentOffset;
}
ios
我不懂哦,或者你可以和原作者讨论讨论http://ask.csdn.net/questions/374