ios - 缩放 super View 时如何防止按钮调整大小？
<p><p>我在一个 View 中添加了多个手势，该 View 在 View 的角落有一个关闭按钮，一切正常，但是当我缩放时，该 View 关闭按钮也随着该 View 缩放，现在我想缩放只有那个 View 不是那个关闭按钮，请建议我怎么做？</p>
<p>引用下图。</p>
<p> <a href="/image/cbW85.png" rel="noreferrer noopener nofollow"><img src="/image/cbW85.png" alt="enter image description here"/></a> </p>
<p>捏缩放代码</p>
<pre><code> -(void)addStickersWithView:(UIView*)view image:(UIImage*)image{
CGPoint center = self.imgPhoto.center;
UIImageView *imgView = [ initWithImage:image];
UIRotationGestureRecognizer *rotationGesture = [ initWithTarget:self action:@selector(rotatePiece:)];
;
UIView *viewZoom = [ initWithFrame:CGRectMake(center.x-45,center.y-45, 90, 90)];
// ];
imgView.frame = CGRectMake(5, 5, CGRectGetWidth(viewZoom.frame)-10, CGRectGetHeight(viewZoom.frame)-10);
;
;
UIPinchGestureRecognizer *pinchGesture = [ initWithTarget:self action:@selector(scalePiece:)];
;
;
UIPanGestureRecognizer *panGesture = [ initWithTarget:self action:@selector(moveImage:)];
;
;
;
UIButton *btnCloseSticker = ;
;
forState:UIControlStateNormal];
;
self.stickerCount++;
btnCloseSticker.tag = self.stickerCount;
UITapGestureRecognizer *tapGesture = [initWithTarget:self action:@selector(TapToShowClose:)];
tapGesture.numberOfTapsRequired = 2;
;
viewZoom.layer.borderColor = .CGColor;
viewZoom.layer.borderWidth = 3.0;
viewZoom.tag = self.stickerCount+kTagBorder;
;
;
}
-(void)hideShowBorderCloseButton{
int borderCount = self.stickerCount-kTagBorder;
for(int i=1;i<=borderCount;i++){
UIView *view = ;
UIView *view1 = ;
view.hidden = YES;
view1.layer.borderWidth = 0.0;
}
}
-(void)buttonPressed:(id)sender{
UIView *view = ;
;
self.stickerCount--;
}
- (void)scalePiece:(UIPinchGestureRecognizer *)gestureRecognizer {
if( == UIGestureRecognizerStateBegan) {
// Reset the last scale, necessary if there are multiple objects with different scales
lastScale = ;
}
UIButton *btn = ;
if ( == UIGestureRecognizerStateBegan ||
== UIGestureRecognizerStateChanged) {
CGFloat currentScale = [[.layer valueForKeyPath:@"transform.scale"] floatValue];
// Constants to adjust the max/min values of zoom
const CGFloat kMaxScale = 3.0;
const CGFloat kMinScale = 1.0;
CGFloat newScale = 1 -(lastScale - );
newScale = MIN(newScale, kMaxScale / currentScale);
newScale = MAX(newScale, kMinScale / currentScale);
CGAffineTransform transform = CGAffineTransformScale([ transform], newScale, newScale);
.transform = transform;
lastScale = ;// Store the previous scale factor for the next pinch gesture call
}
}
-(void)TapToShowClose:(UITapGestureRecognizer *)gestureRecognizer{
//int borderCount = self.stickerCount-kTagBorder;
UIView *view = gestureRecognizer.view; //cast pointer to the derived class if needed
view.layer.borderWidth = 2.0;
UIView *view1 = ;
[(UIButton*)view1 setImage: forState:UIControlStateNormal];
;
view1.hidden = NO;
}
- (void)moveImage:(UIPanGestureRecognizer *)recognizer
{
CGPoint newCenter = ;
;
if( == UIGestureRecognizerStateBegan) {
beginX = recognizer.view.center.x;
beginY = recognizer.view.center.y;
}
newCenter = CGPointMake(beginX + newCenter.x, beginY + newCenter.y);
;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
// if the gesture recognizers are on different views, don't allow simultaneous recognition
if (gestureRecognizer.view != otherGestureRecognizer.view)
return NO;
// if either of the gesture recognizers is the long press, don't allow simultaneous recognition
if (] || ])
return NO;
return YES;
}
- (void)rotatePiece:(UIRotationGestureRecognizer *)gestureRecognizer {
;
;
if ( == UIGestureRecognizerStateBegan || == UIGestureRecognizerStateChanged) {
.transform = CGAffineTransformRotate([ transform], );
;
}
}
- (void)adjustAnchorPointForGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer {
;
if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
UIView *piece = gestureRecognizer.view;
CGPoint locationInView = ;
CGPoint locationInSuperview = ;
piece.layer.anchorPoint = CGPointMake(locationInView.x / piece.bounds.size.width, locationInView.y / piece.bounds.size.height);
piece.center = locationInSuperview;
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>代替缩放 View 。用缩放级别计算框架很容易。并更新 View 的框架。看看下面的方法。 </p>
<pre><code>- (IBAction)scalePiece:(UIPinchGestureRecognizer *)gestureRecognizer {
if( == UIGestureRecognizerStateBegan) {
// Reset the last scale, necessary if there are multiple objects with different scales
lastScale = ;
}
if ( == UIGestureRecognizerStateBegan ||
== UIGestureRecognizerStateChanged) {
CGFloat newScale = 1 -(lastScale - );
;
lastScale = ;// Store the previous scale factor for the next pinch gesture call
}
}
-(void)changeScale :(float)newScale{
CGAffineTransform transform = CGAffineTransformScale(, newScale, newScale);
viewForpinch.transform = transform;
float scale = viewForpinch.transform.a;
float buttonScale = 1 / scale;
btnl.transform= CGAffineTransformScale(CGAffineTransformIdentity, buttonScale, buttonScale);
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - 缩放 superView 时如何防止按钮调整大小？，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/35267627/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/35267627/
</a>
</p>
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