Uiview flip effect implementation

Uiview flip effect implementation

Http://blog.csdn.net/studyrecord/article/details/6440823

Create a view-based template project and add the following code to the viewcontroller file to implement the flip effect;

 

-(Void) viewdidload {

[Super viewdidload];

 

// View to be flipped

Uiview * parentview = [[uiview alloc] initwithframe: cgrectmake (0,150,320,200)];

Parentview. backgroundcolor = [uicolor yellowcolor];

Parentview. tag= 1000;

 

[Self. View addsubview: parentview];

}

 

// Declare the following action response function in the H header file

// Add a button to the XIB file. The response function is the following function.

// After running the program, click the button to see the flip Effect

-(Ibaction) actionfanzhuan {

 

// Obtain the device context of the current drawing

Cgcontextref context = uigraphicsgetcurrentcontext ();

 

// Start preparing the animation

[Uiview beginanimations: Nil context: Context];

 

// Set the animation curve. The translation is not accurate. For details, see the official documentation of apple.

[Uiview setanimationcurve: uiviewanimationcurveeaseinout];

 

// Set the animation duration

[Uiview setanimationduration: 1.0];

 

// Because no member variables are added to the viewcontroller class, use the following method to obtain the subview added by viewdidload.

Uiview * parentview = [self. View viewwithtag: 1000];

 

// Set the animation effect

[Uiview setanimationtransition: uiviewanimationtransitioncurldown forview: parentview cache: Yes]; // from top to bottom

// [Uiview setanimationtransition: uiviewanimationtransitioncurlup forview: parentview cache: Yes]; // from bottom to top

// [Uiview setanimationtransition: uiviewanimationtransitionflipfromleft forview: parentview cache: Yes]; // left to right

// [Uiview setanimationtransition: uiviewanimationtransitionflipfromright forview: parentview cache: Yes]; // right to left

 

// Set the animation delegate

[Uiview setanimationdelegate: Self];

 

// When the animation execution ends, execute the animationfinished method.

[Uiview setanimationdidstopselector: @ selector (animationfinished :)];

 

// Submit an animation

[Uiview commitanimations];

}

 

// Animation effect execution completed

-(Void) animationfinished: (ID) sender {

Nslog (@ "animationfinished! ");

}

 

 

 

Run the program and click the button to see the animation effect.

 

 

 

 

Now I have added two child views to the parentview for animation.

 

-(Void) viewdidload {

[Super viewdidload];

 

 

Uiview * parentview = [[uiview alloc] initwithframe: cgrectmake (0,150,320,200)];

Parentview. backgroundcolor = [uicolor yellowcolor];

Parentview. tag= 1000;

 

 

Uiimageview * image1 = [[uiimageview alloc] initwithframe: cgrectmake (50, 50,100,100)];

Image1.backgroundcolor = [uicolor redcolor];

Image1.tag= 1001;

 

 

Uiimageview * image2 = [[uiimageview alloc] initwithframe: cgrectmake (50, 50,100,100)];

Image2.backgroundcolor = [uicolor bluecolor];

Image2.tag = 1002;

 

 

[Parentview addsubview: image1];

[Parentview addsubview: image2];

 

 

[Self. View addsubview: parentview];

}

 

-(Ibaction) actionfanzhuan {

 

 

Cgcontextref context = uigraphicsgetcurrentcontext ();

[Uiview beginanimations: Nil context: Context];

[Uiview setanimationcurve: uiviewanimationcurveeaseinout];

[Uiview setanimationduration: 1.0];

 

 

Uiview * parentview = [self. View viewwithtag: 1000];

 

 

[Uiview setanimationtransition: uiviewanimationtransitioncurldown forview: parentview cache: Yes];

// [Uiview setanimationtransition: uiviewanimationtransitioncurlup forview: parentview cache: Yes];

// [Uiview setanimationtransition: uiviewanimationtransitionflipfromleft forview: parentview cache: Yes];

// [Uiview setanimationtransition: uiviewanimationtransitionflipfromright forview: parentview cache: Yes];

 

 

Nsinteger Purple = [[parentview subviews] indexofobject: [parentview viewwithtag: 1002];

Nsinteger maroon = [[parentview subviews] indexofobject: [parentview viewwithtag: 1001];

[Parentview exchangesubviewatindex: Purple withsubviewatindex: maroon];

 

[Uiview setanimationdelegate: Self];

[Uiview setanimationdidstopselector: @ selector (animationfinished :)];

[Uiview commitanimations];

 

}

 

-(Void) animationfinished: (ID) sender {

Nslog (@ "animationfinished! ");

}

 

 

 

In addition, I previously wrote the animation implementation code in viewdidload, but the animation effect was not consistent. It was originally executed in viewdidload.

Cgcontextref context = uigraphicsgetcurrentcontext ();

The pointer to the next context is 0.