两个3D效果

第一种:

是大家都知道的开源代码openflow,相关链接:http://www.sunetos.com/items/2010/12/05/open-source-ios-coverflow-implementations/

第二种:

绕某个中心线旋转的3D效果特效

代码如下:

.h里

#import<UIKit/UIKit.h>

@interface Test3DController :UIViewController {

    

    float currentAngle;

    float lastAngle;

    

    NSTimer *animationTimer;

    

    NSMutableArray *carouselViews;

    

    UITouch *trackingTouch;

}

@end

.m里

#import<QuartzCore/QuartzCore.h>

#import"Test3DController.h"

@implementation Test3DController

- (void)setCarouselAngle:(float)angle

{

   // we want to step around the outside of a circle in

   // linear steps; work out the distance from one step

   // to the next

    float angleToAdd = 360.0f / [carouselViewscount];

    

   // apply positions to all carousel views

   for(UIView *viewin carouselViews)

    {

       NSLog(@"3D view : %f,%f",view.frame.origin.x,view.frame.origin.y);

        float angleInRadians = angle * M_PI / 180.0f;

        

       // get a location based on the angle

        float xPosition = (self.view.frame.size.width * 0.5f) + 100.0f *sinf(angleInRadians);

        float yPosition = (self.view.frame.size.height * 0.5f) + 30.0f *cosf(angleInRadians);

        

       // get a scale too; effectively we have:

        //

       //  0.75f   the minimum scale

       //  0.25f   the amount by which the scale varies over half a circle

        //

       // so this will give scales between 0.75 and 1.25. Adjust to suit!

        float scale = 0.75f + 0.25f * (cosf(angleInRadians) + 1.0);

        

       // apply location and scale

        view.transform =CGAffineTransformScale(CGAffineTransformMakeTranslation(xPosition, yPosition), scale, scale);

        

       // tweak alpha using the same system as applied for scale, this time

       // with 0.3 the minimum and a semicircle range of 0.5

        view.alpha = 0.3f + 0.5f * (cosf(angleInRadians) + 1.0);

        

       // setting the z position on the layer has the effect of setting the

       // draw order, without having to reorder our list of subviews

        view.layer.zPosition = scale;

        

       // work out what the next angle is going to be

        angle += angleToAdd;

    }

}

- (void)animateAngle

{

   // work out the difference between the current angle and

   // the last one, and add that again but made a bit smaller.

   // This gives us inertial scrolling.

    float angleNow = currentAngle;

   currentAngle += (currentAngle -lastAngle) * 0.97f;

    lastAngle = angleNow;

    

   // push the new angle into the carousel

    [selfsetCarouselAngle:currentAngle];

    

   // if the last angle and the current one are now

   // really similar then cancel the animation timer

   if(fabsf(lastAngle -currentAngle) < 0.001)

    {

        [animationTimerinvalidate];

       animationTimer = nil;

    }

}

-(void)btnCallBack:(id)sender

{

    UIButton *btn = (UIButton*)sender;

   NSLog(@"BUTTON PRESS view tag : %d",btn.tag);

}

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.

- (void)viewDidLoad 

{

    [superviewDidLoad];

   //[self.view setBackgroundColor:[UIColor blackColor]];

   // create views that are an 80x80 rect, centred on (0, 0)

    CGRect frameForViews = CGRectMake(-40, -40, 80, 80);

    

   // create six views, each with a different colour. 

   carouselViews = [[NSMutableArrayalloc] initWithCapacity:6];

    int c = 7;

    while(c--)

    {

       //UIView *view = [[UIView alloc] initWithFrame:frameForViews];

       UIButton *view = [UIButtonbuttonWithType:UIButtonTypeCustom];

        [view setFrame:frameForViews];

       //[view setBounds:frameForViews];

        view.tag = c;

       // We don't really care what the colours are as long as they're different,

       // so just do anything

        view.backgroundColor = [UIColorcolorWithRed:(c&4) ? 1.0 : 0.0 green:(c&2) ? 1.0 : 0.0 blue:(c&1) ? 1.0 : 0.0alpha:1.0];

        

        [viewaddTarget:selfaction:@selector(btnCallBack:)forControlEvents:UIControlEventTouchUpInside];

        

       // make the view visible, also add it to our array of carousel views

        [carouselViewsaddObject:view];

        [self.viewaddSubview:view];

        

    }

    

   currentAngle = lastAngle = 0.0f;

    [selfsetCarouselAngle:currentAngle];

    

    /*

     Note: I've omitted viewDidUnload for brevity; remember to implement one and

     clean up after all the objects created here

     */

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

   // if we're not already tracking a touch then...

    

   if(!trackingTouch)

    {

       // ... track any of the new touches, we don't care which ...

        trackingTouch = [touches anyObject];

        

       // ... and cancel any animation that may be ongoing

        [animationTimerinvalidate];

       animationTimer = nil;

       lastAngle = currentAngle;

    }

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

   // if our touch moved then...

   if([touchescontainsObject:trackingTouch])

    {

       // use the movement of the touch to decide

       // how much to rotate the carousel

       CGPoint locationNow = [trackingTouchlocationInView:self.view];

       CGPoint locationThen = [trackingTouchpreviousLocationInView:self.view];

        

       lastAngle = currentAngle;

        currentAngle += (locationNow.x - locationThen.x) * 180.0f /self.view.bounds.size.width;

       // the 180.0f / self.view.bounds.size.width just says "let a full width of my view

       // be a 180 degree rotation"

        

       // and update the view positions

        [selfsetCarouselAngle:currentAngle];

    }

}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

   // if our touch ended then...

   if([touchescontainsObject:trackingTouch])

    {

       // make sure we're no longer tracking it

       trackingTouch = nil;

        

       // and kick off the inertial animation

       animationTimer = [NSTimerscheduledTimerWithTimeInterval:0.02 target:selfselector:@selector(animateAngle)userInfo:nilrepeats:YES];

    }

}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event

{

   // treat cancelled touches exactly like ones that end naturally

    [selftouchesEnded:touches withEvent:event];

}

@end