iOS development--rotate, move, and scale gesture instance code

Add all the gestures

• -(void) Addgesturerecognizertoview: (UIView *) View
• {
• //Rotation gestures
• Uirotationgesturerecognizer *rotationgesturerecognizer = [[Uirotationgesturerecognizer alloc] InitWithTarget:self Action: @selector (Rotateview:)];
• [View Addgesturerecognizer:rotationgesturerecognizer];
• //Zoom gesture
• Uipinchgesturerecognizer *pinchgesturerecognizer = [[Uipinchgesturerecognizer alloc] initwithtarget:self action:@ Selector (Pinchview:)];
• [View Addgesturerecognizer:pinchgesturerecognizer];
• //Mobile gestures
• Uipangesturerecognizer *pangesturerecognizer = [[Uipangesturerecognizer alloc] initwithtarget:self action: @selector ( Panview:)];
• [View Addgesturerecognizer:pangesturerecognizer];
• }
• Handling Rotation gestures
• -(void) Rotateview: (Uirotationgesturerecognizer *) Rotationgesturerecognizer
• {
• UIView *view = Rotationgesturerecognizer.view;
• if (rotationgesturerecognizer.state = = Uigesturerecognizerstatebegan | | rotationgesturerecognizer.state = = uigesturerecognizerstatechanged) {
• View.transform = Cgaffinetransformrotate (View.transform, rotationgesturerecognizer.rotation);
• [Rotationgesturerecognizer setrotation:0];
• }
• }
• Handling Zoom gestures
• -(void) Pinchview: (Uipinchgesturerecognizer *) Pinchgesturerecognizer
• {
• UIView *view = Pinchgesturerecognizer.view;
• if (pinchgesturerecognizer.state = = Uigesturerecognizerstatebegan | | pinchgesturerecognizer.state = = uigesturerecognizerstatechanged) {
• View.transform = Cgaffinetransformscale (View.transform, Pinchgesturerecognizer.scale, PinchGestureRecognizer.scale );
• Pinchgesturerecognizer.scale = 1;
• }
• }
• Handling Drag gestures
• -(void) Panview: (Uipangesturerecognizer *) Pangesturerecognizer
• {
• UIView *view = Pangesturerecognizer.view;
• if (pangesturerecognizer.state = = Uigesturerecognizerstatebegan | | pangesturerecognizer.state = = uigesturerecognizerstatechanged) {
• Cgpoint translation = [Pangesturerecognizer TranslationInView:view.superview];
• [View SetCenter: (Cgpoint) {view.center.x + translation.x, View.center.y + translation.y}];
• [Pangesturerecognizer Settranslation:cgpointzero InView:view.superview];
• }
• }

Don't forget

Java code  

1. [Self addgesturerecognizertoview:view];

If you're dealing with a picture, don't forget.

C code  

1. [ImageView Setuserinteractionenabled:yes];
2. [ImageView Setmultipletouchenabled:yes];

iOS development--rotate, move, and scale gesture instance code