[英]animation similar to opening app in ios7
我想創建一個類似於iOS7中的iPhone打開的動畫。 在這個動畫中,它只顯示應用程序從哪個點打開並在同一點關閉。
誰能幫幫我嗎?
@property (weak, nonatomic) IBOutlet UIImageView *bg;
@property (weak, nonatomic) IBOutlet UIImageView *cal;
…
bool nowZoomed = NO;
CGRect iconPosition = {16,113,60,60}; // customize icon position
- (CGRect)zoomedRect // just a helper function, to get the new background screen size
{
float screenWidth = UIScreen.mainScreen.bounds.size.width;
float screenHeight = UIScreen.mainScreen.bounds.size.height;
float size = screenWidth / iconPosition.size.width;
float x = screenWidth/2 - (CGRectGetMidX(iconPosition) * size);
float y = screenHeight/2 - (CGRectGetMidY(iconPosition) * size);
return CGRectMake(x, y, screenWidth * size, screenHeight * size);
}
- (IBAction)test
{
float animationDuration = 0.3f; //default
if (nowZoomed) // zoom OUT
{
[UIView animateWithDuration:animationDuration animations:^{ // animate to original frame
_cal.frame = iconPosition;
_bg.frame = UIScreen.mainScreen.bounds;
} completion:^(BOOL finished) {
[UIView animateWithDuration:animationDuration/2.0f animations:^{ // then fade out
_cal.alpha = 0.0f;
} completion:^(BOOL finished) {
_cal.hidden = YES;
}];
}];
}
else // zoom IN
{
_cal.alpha = 0.0f;
_cal.hidden = NO;
[UIView animateWithDuration:animationDuration/2.0f animations:^{ // fade in faster
_cal.alpha = 1.0f;
}];
[UIView animateWithDuration:animationDuration animations:^{ // while expanding view
_cal.frame = UIScreen.mainScreen.bounds;
_bg.frame = [self zoomedRect];
}];
}
nowZoomed = !nowZoomed;
}
{16,113,60,60}
IBOutlet
(前兩行代碼) -(void)test
故事板圖片(左)和動畫過渡(右)
在這種情況下,我個人更喜歡使用CGAffineTransformMakeScale()
和設置-[CALayer affineTransform]
。
affineTransform非常易於使用,並帶有Core Animation的一些不錯的隱含優勢。 這樣做的例子就是處理隱式更改框架原點的處理,並且如果需要的話可以很容易地重置回初始尺寸 - 你從來沒有丟失它!
[UIView animateWithDuration:0.3 animations:^{
view.layer.affineTransform = CGAffineTransformMakeScale(10.0, 10.0); // To make a view larger:
otherView.layer.affineTransform = CGAffineTransformMakeScale(0.0, 0.0); // to make a view smaller
}];
和
// To reset views back to their initial size after changing their sizes:
[UIView animateWithDuration:0.3 animations:^{
view.layer.affineTransform = CGAffineTransformIdentity;
otherView.layer.affineTransform = CGAffineTransformIdentity;
}];
據我所知,該動畫是使用截圖制作的。 它會更新視圖的框架,同時從應用程序徽標平滑過渡到應用程序的屏幕截圖。 我已經將iPod(音樂)應用程序的開頭從設備的右下角模仿到屏幕大小:
UIView * v = [[UIView alloc]init];
CGSize size = self.view.bounds.size;
CGRect frameInitial = CGRectMake(size.width - 30, size.height - 30, 20, 20);
CGRect frameFinal = CGRectMake(0,0, size.width, size.height);
[v setFrame:frameInitial];
如果要為幀大小設置動畫,請使用下面的行:
[UIView animateWithDuration:0.3f
delay:0.0f
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
[v setFrame:frameFinal];
} completion:nil];
編輯:沒有意識到縮放也包括背景。 下面的代碼沒有經過測試(我不在工作)所以期待一些缺陷和錯別字。
想象一下,在視圖控制器的視圖中有兩層。 直接在vc上有你想要打開的應用程序,我們稱之為finalView。 在頂層有一個包含所有應用程序的窗口,可以縮放和淡入您的應用程序,這是它背后的視圖。 讓我們先調用它。
初始cond:firstView的框架為320 x 480(這是一個包含所有應用程序圖標的窗口)。 它的alpha值為1. finalView具有相同的框架和alpha,但它位於firstView后面。 最終的cond:finalView仍將具有相同的幀和alpha。 但是firstView將放大到右下角(將有一個巨大的框架)和淡出(alpha - > 0)。
//初始cond :(或者更好地使用IB)
CGRect frameInitial = CGRectMake(0,0, self.view.size.width, self.view.size;
CGRect frameFinal = CGRectMake(self.view.size.width * -4 ,self.view.size.height * -5, self.view.size.width * -5,self.view.size.width * -6);
[v setFrame:frameInitial];
如果要為幀大小設置動畫,請使用下面的行:
[UIView animateWithDuration:0.3f
delay:0.0f
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
[v setFrame:frameFinal];
} completion:nil];
我有一個小型UICollectionViewFloatLayout
,它使用UICollectionViewFloatLayout
來創建縮放效果, https://github.com/MichaelQuan/ios7ZoomEffect 。 它仍然是一項正在進行的工作,但基本的想法就在那里
布局代碼是:
@interface ExpandingCollectionViewLayout ()
@property (nonatomic, assign) CGRect selectedCellFrame;
@property (nonatomic, strong) NSIndexPath *selectedIndexPath;
@end
- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect
{
NSArray *layoutAttributes = [super layoutAttributesForElementsInRect:rect];
[layoutAttributes enumerateObjectsUsingBlock:^(UICollectionViewLayoutAttributes *obj, NSUInteger idx, BOOL *stop) {
[self _transformLayoutAttributes:obj];
}];
return layoutAttributes;
}
- (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewLayoutAttributes *layoutAttributes = [super layoutAttributesForItemAtIndexPath:indexPath];
[self _transformLayoutAttributes:layoutAttributes];
return layoutAttributes;
}
- (void)_transformLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes
{
if (self.selectedIndexPath != nil)
{
if ([layoutAttributes.indexPath isEqual:self.selectedIndexPath]) {
// set the frame to be the bounds of the collectionView to expand to the entire collectionView
layoutAttributes.frame = self.collectionView.bounds;
} else {
//scale = collectionView.size / cell_selected.size
//translate = (scale - 1)(cell_i.center - cell_selected.center) + (collectionView.center - cell_selected.center)
CGRect collectionViewBounds = self.collectionView.bounds;
CGRect selectedFrame = self.selectedCellFrame;
CGRect notSelectedFrame = layoutAttributes.frame;
// Calculate the scale transform based on the ratio between the selected cell's frame and the collection views bound
// Scale on that because we want everything to look scaled by the same amount, and the scale is dependent on how much the selected cell has to expand
CGFloat x_scale = collectionViewBounds.size.width / selectedFrame.size.width;
CGFloat y_scale = collectionViewBounds.size.height / selectedFrame.size.height;
CGAffineTransform scaleTransform = CGAffineTransformMakeScale(x_scale, y_scale);
// Translation based on how much the selected cell has been scaled
// translate based on the (scale - 1) and delta between the centers
CGFloat x_zoomTranslate = (x_scale - 1) * (CGRectGetMidX(notSelectedFrame) - CGRectGetMidX(selectedFrame));
CGFloat y_zoomTranslate = (y_scale - 1) * (CGRectGetMidY(notSelectedFrame) - CGRectGetMidY(selectedFrame));
CGAffineTransform zoomTranslate = CGAffineTransformMakeTranslation(x_zoomTranslate, y_zoomTranslate); //Translation based on how much the cells are scaled
// Translation based on where the selected cells center is
// since we move the center of the selected cell when expanded to full screen, all other cells must move by that amount as well
CGFloat x_offsetTranslate = CGRectGetMidX(collectionViewBounds) - CGRectGetMidX(selectedFrame);
CGFloat y_offsetTranslate = CGRectGetMidY(collectionViewBounds) - CGRectGetMidY(selectedFrame);
CGAffineTransform offsetTranslate = CGAffineTransformMakeTranslation(x_offsetTranslate, y_offsetTranslate);
// multiply translations first
CGAffineTransform transform = CGAffineTransformConcat(zoomTranslate, offsetTranslate);
transform = CGAffineTransformConcat(scaleTransform, transform);
layoutAttributes.transform = transform;
}
}
}
要使用此布局代碼展開單元格,請將selectedCellFrame
和selectedIndexPath
設置為要擴展的單元格,並在集合視圖上調用performBatchUpdates:completion:
. 要折疊設置selectedCellFrame = CGRectNull
和selectedIndexPath = nil
並調用performBatchUpdates:completion:
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