我不知道如何处理: - /
我只需要在图像上添加贴纸。应用程序将在选择特定贴纸时贴上像表情符号,心(图像)的贴纸,它将被添加到主图像中,用户可以使用贴纸进行操作,如旋转,缩放等,用户可以选择多个贴纸并可以进行旋转缩放等添加贴纸,
请指导如何实现这一点,我能够用单个贴纸执行图像制作我不知道如何进行多个贴纸选择,用户可以再次回到任何贴纸并对其进行操作。
答案 0 :(得分:5)
您可以使用此方法添加手势:
- (void) addGestureRecognizers{
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[self addGestureRecognizer:panRecognizer];
UIRotationGestureRecognizer *rotateRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];
self.multipleTouchEnabled = YES;
[self addGestureRecognizer:rotateRecognizer];
UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
[self addGestureRecognizer:pinchRecognizer];
UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressed:)];
longPressRecognizer.minimumPressDuration = 2.0;
[self addGestureRecognizer:longPressRecognizer];
}
并实现这些选择器:
- (void) move:(UIPanGestureRecognizer *)recognizer{
CGPoint translation = [recognizer translationInView:self.superview];
recognizer.view.center = CGPointMake(recognizer.view.center.x+translation.x, recognizer.view.center.y+translation.y);
[recognizer setTranslation:CGPointMake(0, 0) inView:self.superview];
}
- (void) rotate:(UIRotationGestureRecognizer *)recognizer{
NSLog(@"Rotate");
recognizer.view.transform = CGAffineTransformRotate(
recognizer.view.transform,
recognizer.rotation);
recognizer.rotation = 0;
}
- (void) pinch:(UIPinchGestureRecognizer *)recognizer{
recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale);
recognizer.scale = 1;
}
- (void) longPressed:(UILongPressGestureRecognizer *)recognizer{
NSLog(@"Long Pressed");
}
注意:根据需要更改值
答案 1 :(得分:0)
我希望您在图像视图中添加手势,当您单击特定图像时,您想对该特定图像执行某些操作,然后尝试这样可能会帮助您
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageTapped:)];
...
- (void)imageTapped:(UITapGestureRecognizer *)sender
{
UIView *selectedView = sender.view;
//perform action here
or
sender.view.frame=newFrame;//you can set your frame
}
添加此项以进行同步手势识别。
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES:
}