要显示的图像上的视图，但在semicurve形状

Question

我想显示在整个屏幕上的iPhone应用的图像，但具有半曲线的形状。 图像应该从角落开始触摸，结束于触摸另一个角落。我没有一个想法让这个任何人都可以帮助我。 该图像表是半弯曲但图像应显示上半弯曲形状

Answer 1

改变图像是curvical或与图像播放，可以实现使用的CALayer。每个imageView都有一个图层。用它来显示效果。你想你的表图像的影响可以通过这个代码来达到的： -

-(void) viewDidLoad{ 

    [self paperCurlShadowImage]; 
} 

-(void) paperCurlShadowImage{ 

     imgView = [[UIImageView alloc] initWithImage:image]; 
     imgView.frame=CGRectMake(0, 0, image.size.width, image.size.height); 


     [self.view addSubview:imgView]; 

     imgView.layer.shadowColor = [UIColor blackColor].CGColor; 
     imgView.layer.shadowOpacity = 0.7f; 
     imgView.layer.shadowOffset = CGSizeMake(10.0f, 10.0f); 
     imgView.layer.shadowRadius = 2.0f; 
     imgView.layer.masksToBounds = NO; 


     imgView.layer.shadowPath = [self renderPaperCurl:imgView]; 
     [imgView release]; 

}

- (CGPathRef)renderPaperCurl:(UIView*)imgView1 { 
    CGSize size = imgView1.bounds.size; 
    CGFloat curlFactor = 15.0f; 
    CGFloat shadowDepth = 5.0f; 

    UIBezierPath *path = [UIBezierPath bezierPath]; 
    [path moveToPoint:CGPointMake(0.0f, 0.0f)]; 
    [path addLineToPoint:CGPointMake(size.width, 0.0f)]; 
    [path addLineToPoint:CGPointMake(size.width, size.height + shadowDepth)]; 
    [path addCurveToPoint:CGPointMake(0.0f, size.height + shadowDepth) 
      controlPoint1:CGPointMake(size.width - curlFactor, size.height + shadowDepth - curlFactor) 
      controlPoint2:CGPointMake(curlFactor, size.height + shadowDepth - curlFactor)]; 

    return path.CGPath; 
}