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我需要模拟照片库效果。照片库功能
我有uiimageview，我需要放大和缩小，规模和 - 如果我双抽头（或震动了iPad的 - 我想要的图像返回到它的实际大小
我尝试了很多，但所有可用的例子是越野车和不完整的，我不希望使用uiwebview
任何建议，请
这里是鉴于代码
做负载 ：？
holderView = [[UIView alloc] initWithFrame:CGRectMake(0,0,self.view.bounds.size.width,self.view.bounds.size.height)];
imageview = [[UIImageView alloc] initWithFrame:[holderView frame]];
[imageview setImage:myimage];
imageview.contentMode = UIViewContentModeScaleAspectFit;
//holderView.contentMode = UIViewContentModeScaleAspectFit ;
[holderView addSubview:imageview];
UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scale:)];
[pinchRecognizer setDelegate:self];
[holderView addGestureRecognizer:pinchRecognizer];
UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];
[rotationRecognizer setDelegate:self];
[holderView addGestureRecognizer:rotationRecognizer];
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[holderView addGestureRecognizer:panRecognizer];
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped:)];
[tapRecognizer setNumberOfTapsRequired:1];
[tapRecognizer setDelegate:self];
[holderView addGestureRecognizer:tapRecognizer];
和下面是我使用的功能
-(void)scale:(id)sender {
[self.view bringSubviewToFront:[(UIPinchGestureRecognizer*)sender view]];
if(zooming)
{
if([(UIPinchGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
lastScale = 1.0;
return;
}
CGFloat scale = 1.0 - (lastScale - [(UIPinchGestureRecognizer*)sender scale]);
CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)sender view].transform;
CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale);
[[(UIPinchGestureRecognizer*)sender view] setTransform:newTransform];
lastScale = [(UIPinchGestureRecognizer*)sender scale];
OldTransform = newTransform;
OldCenter = [(UIPinchGestureRecognizer*)sender view].center;
Does_Panned = YES ;
Does_transformed = YES ;
}
else {
}
}
-(void)rotate:(id)sender {
if(zooming)
{
[self.view bringSubviewToFront:[(UIRotationGestureRecognizer*)sender view]];
if([(UIRotationGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
lastRotation = 0.0;
return;
}
CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)sender rotation]);
CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)sender view].transform;
CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation);
[[(UIRotationGestureRecognizer*)sender view] setTransform:newTransform];
lastRotation = [(UIRotationGestureRecognizer*)sender rotation];
OldTransform = newTransform ;
OldCenter = [(UIPinchGestureRecognizer*)sender view].center;
Does_Panned = YES ;
Does_transformed = YES ;
}
}
-(void)move:(id)sender {
if(zooming)
{
[[[(UITapGestureRecognizer*)sender view] layer] removeAllAnimations];
[self.view bringSubviewToFront:[(UIPanGestureRecognizer*)sender view]];
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
firstX = [[sender view] center].x;
firstY = [[sender view] center].y;
}
translatedPoint = CGPointMake(firstX+translatedPoint.x, firstY+translatedPoint.y);
[[sender view] setCenter:translatedPoint];
OldCenter = translatedPoint ;
Does_Panned = YES ;
Does_transformed = NO ;
if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
CGFloat finalX = translatedPoint.x + (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].x);
CGFloat finalY = translatedPoint.y + (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].y);
if(UIDeviceOrientationIsPortrait([[UIDevice currentDevice] orientation])) {
if(finalX < 0) {
finalX = 0;
}
else if(finalX > 768) {
finalX = 768;
}
if(finalY < 0) {
finalY = 0;
}
else if(finalY > 1024) {
finalY = 1024;
}
}
else {
if(finalX < 0) {
finalX = 0;
}
else if(finalX > 1024) {
finalX = 768;
}
if(finalY < 0) {
finalY = 0;
}
else if(finalY > 768) {
finalY = 1024;
}
}
[UIView beginAnimations:nil context:NULL];
//[UIView setAnimationDelay: 1.0];
[UIView setAnimationDuration:.20];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
//[[sender view] setCenter:CGPointMake(finalX, finalY)];
[UIView commitAnimations];
}
}
else{
if([(UIPanGestureRecognizer*)sender maximumNumberOfTouches] == 1)
{
UIPanGestureRecognizer* recognize = (UIPanGestureRecognizer*)sender;
//change the current window width and level
if([recognize state] == UIGestureRecognizerStateBegan) {
Bigen =[recognize translationInView:recognize.view ];// [[sender view] center];
BeginX = Bigen.x;
BeginY = Bigen.y;
}
else if(
([recognize state] == UIGestureRecognizerStateChanged)||
(recognize.state == UIGestureRecognizerStateEnded) )
{
CGPoint translation = [recognize translationInView:recognize.view ];
End = translation ;
EndX = End.x ;
EndY = End.y ;
double offsetw=0;
double offsetl=0;
if(EndX>BeginX)
{
offsetw=50*(EndX-BeginX);
}
else if(EndX<BeginX)
{
offsetw=50*(EndX-BeginX);
}
else
{
offsetw=0;
}
if(EndY>BeginY)
{
offsetl=50*(EndY-BeginY);
}
else if(EndY<BeginY)
{
offsetl=50*(EndY-BeginY);
}
else
{
offsetl=0;
}
ChangeWW_Wl(offsetw, offsetl);
[self AddImage];
}
//if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
/* CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
EndX = translatedPoint.x;
EndY = translatedPoint.y;*/
//}
}
}
}
(void)tapped:(id)sender {
if(zooming)
{
[[[(UITapGestureRecognizer*)sender view] layer] removeAllAnimations];
}
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return ![gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]];
}
如何更新它在晃动或双击
的图像到原来的大小重新怎么到这儿来的代码不适当的缩放（第一次放大因子很大）
我已经更新了我的问题，代码和问题让我知道如何更新它以在抖动或双击时将图像重置为原始大小 如何克服不适当的缩放（第一个放大因子很大时间 ） – Ali 2011-02-28 11:48:31