旋转动画xcode iphone

2023年4月8日 191次阅读

我试图使用
xcode中的简单单一视图应用程序围绕圆圈旋转图像.我在主故事板上有一个圆圈图像和一个按钮.我使用下面的代码,但圆形图像向下漂移,然后向左旋转,随着它的旋转.我不确定它缺少什么.

谢谢你的帮助.

ViewController.h

#import <UIKit/UIKit.h>

 @interface ViewController : UIViewController
 {
         IBOutlet UIImageView *theImageView;
         IBOutlet UIButton    *theButton;
         NSTimer              *theTimer;
         float        angle;
         BOOL         runStop;
     }


 @property (atomic, retain) IBOutlet UIImageView *theImageView;
 @property (atomic, retain) IBOutlet UIButton    *theButton;

 -(IBAction)runRoulette:(id)sender;

 @end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize theButton, theImageView;


- (void)viewDidLoad
{
    angle = 0;
    runStop = FALSE;
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)rotateRoulette
{
    theImageView.center = CGPointMake(self.theImageView.center.x, self.theImageView.center.y);
    theImageView.transform=CGAffineTransformMakeRotation (angle);
    angle+=0.001;
}


-(IBAction)runRoulette:(id)sender
{
    if(!runStop)
    {
        theTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/600.0 target:self selector:@selector(rotateRoulette) userInfo:nil repeats:YES];
    }
    else
    {
        [theTimer invalidate];
        theTimer = nil;
    }
    runStop = !runStop;
}
@end

最佳答案 我找到了一种非常简单的方法来让我的动画工作我也想要它 –

theImageView.center = CGPointMake(160.0, 364.0);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:5];
//theImageView.center=CGPointMake(self.theImageView.center.x, self.theImageView.center.y);
theImageView.transform = CGAffineTransformMakeRotation(M_PI/2.65);
[UIView commitAnimations];

它旋转theImageView M_PI / 2.65(M_PI / 2.65是roataion数量),计数为5.

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