Objective c uiview animatewithduration在视图关闭后继续完成
我有一个包含UIView动画的modelViewController。当动画块完成时,它会调用自身,从而循环 当我关闭调用[\u饥饿视图removeFromSuperview]的modelViewController(dismissInfo)时,该函数会被一次又一次地调用,每秒打印多次NSLog行Objective c uiview animatewithduration在视图关闭后继续完成,objective-c,uiviewanimation,Objective C,Uiviewanimation,我有一个包含UIView动画的modelViewController。当动画块完成时,它会调用自身,从而循环 当我关闭调用[\u饥饿视图removeFromSuperview]的modelViewController(dismissInfo)时,该函数会被一次又一次地调用,每秒打印多次NSLog行 @implementation InfoVC { NSArray *imgs; NSString *currentImg; } - (void)viewDidLoad { [
@implementation InfoVC
{
NSArray *imgs;
NSString *currentImg;
}
- (void)viewDidLoad
{
[super viewDidLoad];
_imageview.contentMode = UIViewContentModeLeft;
_imageviewUnder.contentMode = UIViewContentModeLeft;
imgs = [NSArray arrayWithObjects:
@"01.jpg",
@"02.jpg",
@"03.jpg",
@"04.jpg",
@"05.jpg",
@"06.jpg",
nil];
_imgInt = (arc4random()%6);
[self initialImage];
}
- (void)viewWillAppear:(BOOL)animated{
}
- (void)viewDidAppear:(BOOL)animated{
NSLog(@"viewDidAppear");
}
- (void)initialImage
{
_starView.contentMode = UIViewContentModeLeft;
_imageviewUnder.contentMode = UIViewContentModeLeft;
currentImg = [imgs objectAtIndex:_imgInt];
UIImage *image = [UIImage imageNamed:currentImg];
_starView = [[UIImageView alloc] initWithImage:image];
// Size the image view to the image (it's bigger)
_starView.bounds = CGRectMake(0.0, 44.0, 416.0, 416.0);
NSLog(@"tarView.center %@", NSStringFromCGPoint(_starView.center) );
_starView.alpha=1;
int nextImgInt = _imgInt + 1 ;
if (nextImgInt>5)
{
nextImgInt=0;
}
NSString *nextImg = [imgs objectAtIndex:nextImgInt];
UIImage *nextImage = [UIImage imageNamed:nextImg];
[_imageviewUnder setImage:nextImage];
[self.view sendSubviewToBack:_imageviewUnder];
_imgInt++;
if (_imgInt>5) {
_imgInt=0;
}
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView animateWithDuration:7.6f
delay:0.1f
options:UIViewAnimationCurveLinear
animations:^{
[_starView setCenter:CGPointMake(112, 208)];
[_starView setAlpha:0.0f];
}
completion:^(BOOL finished){
[_starView removeFromSuperview];
[self initialImage];
}];
[self.view insertSubview:_starView atIndex:1];
}
- (void)visitTwitter
{
NSURL *URL = [NSURL URLWithString:@"http://twitter.com/"];
SVWebViewController *webViewController = [[SVWebViewController alloc] initWithURL:URL];
[self.navigationController pushViewController:webViewController animated:YES];
}
- (IBAction)dismissInfo:(id)sender
{
[self cleanup];
[self dismissModalViewControllerAnimated:YES];
}
- (void)cleanup
{
[_starView.layer removeAllAnimations];
[self.view.layer removeAllAnimations];
[_starView removeFromSuperview];
}
- (void)viewDidUnload
{
[self cleanup];
[super viewDidUnload];
}
@end
将自己设置为动画标志,在viewDidLoad中设置为true,在cleanup中设置为false。然后在initialImage方法中进行检查:
if ( ! animating )
return;
这是我第二次碰到这个。一个可能的原因是在viewDidLoad中初始化了方法,但子视图和图像没有及时准备好(似乎动画循环的第一个过程无法向机器添加重影) 我将呼叫移动到ViewDidDisplay,确保显示初始化图像以停止白色闪烁。最后,在模态窗口中创建无限动画
- (void)viewDidLoad
{
[super viewDidLoad];
_imageview.contentMode = UIViewContentModeLeft;
_imageviewUnder.contentMode = UIViewContentModeLeft;
imgs = [NSArray arrayWithObjects:
@"01.jpg",
@"02.jpg",
@"03.jpg",
@"04.jpg",
@"05.jpg",
@"06.jpg",
nil];
_imgInt = (arc4random()%6);
currentImg = [imgs objectAtIndex:_imgInt];
UIImage *image = [UIImage imageNamed:currentImg];
[_imageviewUnder setImage:image];
}
- (void)viewDidAppear:(BOOL)animated{
[self initialImage];
}
- (void)initialImage
{
currentImg = [imgs objectAtIndex:_imgInt];
UIImage *image = [UIImage imageNamed:currentImg];
_starView = [[UIImageView alloc] initWithImage:image];
// Size the image view to the image (it's bigger)
_starView.bounds = CGRectMake(0.0, 44.0, 416.0, 416.0);
NSLog(@"initialImage");
_starView.alpha=1;
[self.view insertSubview:_starView atIndex:1];
int nextImgInt = _imgInt + 1 ;
if (nextImgInt>5)
{
nextImgInt=0;
}
NSString *nextImg = [imgs objectAtIndex:nextImgInt];
UIImage *nextImage = [UIImage imageNamed:nextImg];
[_imageviewUnder setImage:nextImage];
[self.view sendSubviewToBack:_imageviewUnder];
_imgInt++;
if (_imgInt>5) {
_imgInt=0;
}
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:7.6];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
//[UIView setAnimationDidStopSelector:@selector(initialImage) ];
[_starView setCenter:CGPointMake(112, 208)];
[_starView setAlpha:0.0f];
[UIView commitAnimations];
[self performSelector:@selector(initialImage) withObject:nil afterDelay:7.6];
}
- (IBAction)dismissInfo:(id)sender
{
[self cleanup];
[self dismissModalViewControllerAnimated:YES];
}
- (void)cleanup
{
[NSObject cancelPreviousPerformRequestsWithTarget:self];
[_starView.layer removeAllAnimations];
[self.view.layer removeAllAnimations];
[_starView removeFromSuperview];
}
如果只想创建循环动画,最好使用选项:“UIViewAnimationOptionRepeat”。例如:
[UIView animateWithDuration:2.0
delay:0.0f
options:UIViewAnimationOptionRepeat
animations:^{
[myUIViewThing setCenter:CGPointMake(myUIViewThing.center.x - 100, myUIViewThing.center.y)];
}
completion:nil];