缩放和旋转UIImageView

Question

我想缩放和旋转UIImageView。这是我的代码：

@synthesize immagine, velocita, locationManager, direzione;
- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading{
    double degrees = newHeading.magneticHeading;
    double radians = degrees * M_PI / 180;

    [UIView animateWithDuration:0.05 animations:^{
        self.immagine.transform = CGAffineTransformMakeRotation(-radians);
    }];
}
-(UIView *) viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return immagine;
}
- (void)viewDidLoad
{
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate=self;
    locationManager.desiredAccuracy=kCLLocationAccuracyBestForNavigation;
    [scrollView setDelegate:self];
    [scrollView setContentSize:CGSizeMake(320, 460)];
    immagine = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"mappa1"]];
    immagine.frame = CGRectMake(0, 0, 320, 460);
    immagine.contentMode = UIViewContentModeScaleAspectFit;
    [scrollView addSubview:immagine];
    locationManager.headingFilter = kCLHeadingFilterNone; 
    [locationManager startUpdatingHeading];
    [super viewDidLoad];
}

但是当我进行缩放时，UIImageView会从视图中退出。有人能帮我吗？提前感谢！

Answer 1

我有这样的问题，这两个函数将解决您的问题

- (void)twoFingerPinch:(UIPinchGestureRecognizer *)recognizer 
{     
    CGRect originalFrame=recognizer.view.frame;
    CGRect newFrame=CGRectMake(originalFrame.origin.x, originalFrame.origin.y,           originalFrame.size.width*recognizer.scale, originalFrame.size.height*recognizer.scale);
    if (newFrame.size.width>70&&newFrame.size.width<150) 
    {
        recognizer.view.frame=newFrame;
    }  
}
- (void)twoFingersRotate:(UIRotationGestureRecognizer *)recognizer 
{
    [self.view bringSubviewToFront:[(UIRotationGestureRecognizer*)recognizer view]];
    if([(UIRotationGestureRecognizer*)recognizer state] == UIGestureRecognizerStateEnded) {     
        lastRotation = 0.0;
        return;
    }
    CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)recognizer rotation]);
    CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)recognizer   view].transform;
    CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation);
    [[(UIRotationGestureRecognizer*)recognizer view] setTransform:newTransform];
    lastRotation = [(UIRotationGestureRecognizer*)recognizer rotation];
    // recognizer.view.transform=CGAffineTransformMakeRotation(([recognizer rotation] * 180) / M_PI);
}