要顯示的圖像上的視圖，但在semicurve形狀

Question

我想顯示在整個屏幕上的iPhone應用的圖像，但具有半曲線的形狀。 圖像應該從角落開始觸摸，結束於觸摸另一個角落。我沒有一個想法讓這個任何人都可以幫助我。 該圖像表是半彎曲但圖像應顯示上半彎曲形狀

Answer 1

改變圖像是curvical或與圖像播放，可以實現使用的CALayer。每個imageView都有一個圖層。用它來顯示效果。你想你的表圖像的影響可以通過這個代碼來達到的： -

-(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; 
}