我正在使用 Xcode 4.4，目标是 iOS 5。
如标题所示，我想为不同的图像创建多个捏合手势。我使用两种类型的图像。一种设置为背景，第二种类型的图像是粘贴在设置为背景的图像上的图章。为此，我使用 UIGestureRecognizer。一切都很好，直到我粘贴邮票类型的图像并尝试缩放该图像。我可以缩放，但是当我缩放图像时，图像也已设置为背景缩放。
使用下面的代码，我可以粘贴不同的图像（图章类型），单独点击并拖动它们，但当我尝试所有内容缩放时也不能。为什么不工作？
先感谢您
- (void)viewDidLoad{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
NSLog(@"menuListType=%@ ; menuID=%@", self.category.menuListType ,self.menu.menuID);
UIImage *aImage;
NSString *imagepath = [NSString stringWithFormat:@"%@%@",[FileUtility getPDFImageFolderPath], self.menu.imageID];
if (self.menu.imageID == nil || [self.menu.imageID isEqualToString:@""]) {
// self.canvasView.image = [UIImage imageNamed:@"NotExistFile.jpg"];
aImage = [UIImage imageNamed:@"NotExistFile.jpg"];
} else {
// self.canvasView.image = [UIImage imageWithContentsOfFile:imagepath];
aImage = [UIImage imageWithContentsOfFile:imagepath];
// self.canvasView = [[[UIImageView alloc] initWithImage:self.canvasView.image] autorelease];
}
// Choose image base and set as background
if ([self.category.menuListType isEqualToString:@"4"]) {
//set size
int imageW = aImage.size.width;
int imageH = aImage.size.height;
float scale = (imageW > imageH ? 500.0f/imageH : 500.0f/imageW);
CGSize resizedSize = CGSizeMake(imageW * scale, imageH * scale);
UIGraphicsBeginImageContext(resizedSize);
[aImage drawInRect:CGRectMake(0, 0, resizedSize.width, resizedSize.height)];
UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.canvasView.contentMode = UIViewContentModeTop;
self.canvasView.image = resizedImage;
if (self.menu.imageID == nil || [self.menu.imageID isEqualToString:@""]) {
} else {
self.canvasView = [[[UIImageView alloc] initWithImage:self.canvasView.image] autorelease];
}
} else {
// Paste image and set as background
UIImage *captureImage;
NSString *capturepath = [NSString stringWithFormat:@"%@%@",[FileUtility getPDFImageFolderPath], @"capture.png"];
if ([FileUtility fileExist:capturepath]) {
captureImage = [UIImage imageWithContentsOfFile:capturepath];
} else {
captureImage = [UIImage imageNamed:@"NotExistFile3.png"];
}
self.canvasView.contentMode = UIViewContentModeTop;;
self.canvasView.image = captureImage;
self.canvasView = [[[UIImageView alloc] initWithImage:self.canvasView.image] autorelease];
// Prepare Gestures
iViewsTapidx = 0;
iViewsDblTapidx = 0;
ivMax = sizeof(iViews) / sizeof(iViews[0]);
isTaped = NO;
isDblTaped = NO;
_width = 100;
// Initialization code
// Single tap
UITapGestureRecognizer *tapg =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(tapAction:)];
[self.itemView addGestureRecognizer:tapg];
// Double tap
UITapGestureRecognizer *doubleTap =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(doubleTapAction:)];
doubleTap.numberOfTapsRequired = 2;
[self.itemView addGestureRecognizer:doubleTap];
// longPress（長押し）
UILongPressGestureRecognizer *longPress =
[[UILongPressGestureRecognizer alloc] initWithTarget:self
action:@selector(longPressAction:)];
[self.itemView addGestureRecognizer:longPress];
// drag
UIPanGestureRecognizer *pan =
[[UIPanGestureRecognizer alloc] initWithTarget:self
action:@selector(panAction:)];
[self.itemView addGestureRecognizer:pan];
//pinch
UIPinchGestureRecognizer *pinchGestureRognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
[self.itemView addGestureRecognizer:pinchGestureRognizer];
// Stamp Image
int i = 0;
CGPoint tapPoint = CGPointMake(self.canvasView.center.x, self.canvasView.center.y);
int parcent = aImage.size.width / _width; // Prepare image to paste
// Show stamp
*(iViews+i) = [[UIImageView alloc] initWithImage:aImage];
(*(iViews+i)).frame = CGRectMake(tapPoint.x - aImage.size.width/parcent/2,
tapPoint.y - aImage.size.height/parcent/2,
aImage.size.width/parcent,
aImage.size.height/parcent);
(*(iViews+i)).tag = i+1;
[self.itemView addSubview:*(iViews+i)];
iViewsTapidx = i;
isTaped = YES;
self.itemView.userInteractionEnabled = YES;
}
[self showAnimation];
}
// tap
-(void)tapAction:(UITapGestureRecognizer *) sender{
CGPoint tapPoint = [sender locationInView:self.itemView];
NSLog(@">>>tap x=%.2f, y=%.2f", tapPoint.x, tapPoint.y);
int i =0;
isTaped = NO;
for (i = 0; i < ivMax; i++) {
if (CGRectContainsPoint((*(iViews+i)).frame, tapPoint)) {
isTaped = YES;
iViewsTapidx = i;
NSLog(@"i = %d", i);
break;
}
}
}
// doubleTap
-(void)doubleTapAction:(UITapGestureRecognizer *) sender{
NSLog(@">>>doubleTap");
CGPoint tapPoint = [sender locationInView:self.itemView];
isTaped = NO;
isDblTaped = NO;
int i =0;
for (i = 0; i < ivMax; i++) {
if (CGRectContainsPoint((*(iViews+i)).frame, tapPoint)) {
isDblTaped = YES;
iViewsDblTapidx = i;
break;
}
}
// remove
if (isDblTaped) {
NSLog(@"remove %d", i);
(*(iViews+i)).tag = 0;
[*(iViews+i) removeFromSuperview];
}
}
// longPress
- (void)longPressAction:(UILongPressGestureRecognizer *) sender{
if ([sender state] == UIGestureRecognizerStateBegan) {
NSLog(@">>>longPress 1");
}else if ([sender state] == UIGestureRecognizerStateEnded) {
CGPoint tapPoint = [sender locationInView:self.itemView];
NSLog(@">>>longPress 2 x=%.2f, y=%.2f", tapPoint.x, tapPoint.y);
int i =0;
for (i = 0; i < ivMax; i++) {
NSLog(@"i = %d", i);
if ((*(iViews+i)).tag == 0) {
break;
}
}
if (i < ivMax) {
//Stamp imapge
UIImage *stampImage;
NSString *imagepath = [NSString stringWithFormat:@"%@%@",[FileUtility getPDFImageFolderPath], self.menu.imageID];
if (self.menu.imageID == nil || [self.menu.imageID isEqualToString:@""]) {
stampImage = [UIImage imageNamed:@"NotExistFile.jpg"];
} else {
stampImage = [UIImage imageWithContentsOfFile:imagepath];
}
int parcent = stampImage.size.width / _width; // Set stamp image
//Sow stamp image
*(iViews+i) = [[UIImageView alloc] initWithImage:stampImage];
(*(iViews+i)).frame = CGRectMake(tapPoint.x - stampImage.size.width/parcent/2,
tapPoint.y - stampImage.size.height/parcent/2,
stampImage.size.width/parcent,
stampImage.size.height/parcent);
(*(iViews+i)).tag = i+1;
[self.itemView addSubview:*(iViews+i)];
iViewsTapidx = i;
isTaped = YES;
}
}
}
// drag
- (void)panAction:(UIPanGestureRecognizer *) sender{
NSLog(@">>>pan");
if (isTaped) {
CGPoint p = [sender translationInView:self.itemView];
CGPoint movePoint = CGPointMake((*(iViews+iViewsTapidx)).center.x + p.x,
(*(iViews+iViewsTapidx)).center.y + p.y);
(*(iViews+iViewsTapidx)).center = movePoint;
// NSLog(@">>>pan x=%.2f, y=%.2f --> x=%.2f, y=%.2f", p.x, p.y, movePoint.x, movePoint.y);
NSLog(@">>>pan x=%.2f, y=%.2f", p.x, p.y);
[sender setTranslation:CGPointZero inView:self.itemView];
}
}
-(void) handlePinch:(UIGestureRecognizer *) sender {
UIPinchGestureRecognizer *pinchGesture = (UIPinchGestureRecognizer *) sender;
if (pinchGesture.state == UIGestureRecognizerStateBegan || pinchGesture.state == UIGestureRecognizerStateChanged) {
//UIView *view = pinchGesture.view;
// UIView *view = self.itemView;
self.itemView.transform = CGAffineTransformScale(self.itemView.transform, pinchGesture.scale, pinchGesture.scale);
pinchGesture.scale = 1;
NSLog(@"zoom");
}
}