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- #import <QuartzCore/QuartzCore.h>
- - (void)viewDidLoad
- {
- [super viewDidLoad];
-
-
- [[[self view] layer] setBackgroundColor:[[UIColor blackColor] CGColor]];
-
- UIImage *balloon = [UIImage imageNamed:@"app3.png"];
-
-
-
- CALayer *topLayer = [[CALayer alloc] init];
-
- [topLayer setBounds:CGRectMake(0.0f, 0.0f, 320-100.0, 240-100)];
-
- [topLayer setPosition:CGPointMake(160.0f, 120.0f)];
-
- [topLayer setContents:(id)[balloon CGImage]];
-
- [[[self view] layer] addSublayer:topLayer];
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-
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- CALayer *reflectionLayer = [[CALayer alloc] init];
-
- [reflectionLayer setBounds:CGRectMake(0.0f, 0.0f, 320.0-100, 240.0-100)];
-
- [reflectionLayer setPosition:CGPointMake(160.0f, 310.0f-100)];
-
- [reflectionLayer setContents:[topLayer contents]];
-
- [reflectionLayer setValue:[NSNumber numberWithFloat:180.0] forKeyPath:@"transform.rotation.x"];
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-
-
- CAGradientLayer *gradientLayer = [[CAGradientLayer alloc] init];
-
- [gradientLayer setBounds:[reflectionLayer bounds]];
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- [gradientLayer setPosition:CGPointMake([reflectionLayer bounds].size.width/2, [reflectionLayer bounds].size.height/2)];
-
- [gradientLayer setColors:[NSArray arrayWithObjects: (id)[[UIColor clearColor] CGColor],(id)[[UIColor blackColor] CGColor], nil]];
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- [gradientLayer setStartPoint:CGPointMake(0.5,0.35)];
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- [gradientLayer setEndPoint:CGPointMake(0.5,1.0)];
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- [reflectionLayer setMask:gradientLayer];
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- [[[self view] layer] addSublayer:reflectionLayer];
-
- }
转载自 http://blog.csdn.net/zhibudefeng/article/details/7677239