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interface ViewController ()@property (nonatomic, weak) IBOutlet UIView *coneView;@property (nonatomic, weak) IBOutlet UIView *shipView;@property (nonatomic, weak) IBOutlet UIView *iglooView;@prope

@interface ViewController ()@property (nonatomic, weak) IBOutlet UIView *containerView;@end@implementation ViewController- (UIButton *)customButton{ //create button CGRect frame = CGRectMak

//create shape layer    CAShapeLayer *shapeLayer = [CAShapeLayer layer];    shapeLayer.strokeColor = [UIColor redColor].CGColor;    shapeLayer.fillColor = [UIColor clearColor].CGColor;    shap

CAGradientLayer *gradientLayer = [CAGradientLayer layer];    gradientLayer.frame = view.bounds;    [self.view.layer addSublayer:gradientLayer];        gradientLayer.colors = @[(__bridge id)[UI

#import "ReflectionView.h"#import @implementation ReflectionView+ (Class)layerClass{ return [CAReplicatorLayer class];}- (void)setUp{ //configure replicator CAReplicatorLayer *la

在iOS 5中，苹果引入了一个新的CALayer子类叫做CAEmitterLayer。CAEmitterLayer是一个高性能的粒子引擎，被用来创建实时例子动画如：烟雾，火，雨等等这些效果。CAEmitterLayer看上去像是许多CAEmitterCell的容器，这些CAEmitierCell定义了一个例子效果。你将会为不同的例子效果定义一个或多个CAEmitterCell作为模版，同时CA

#import "ViewController.h"#import #import @interface ViewController ()@property (nonatomic, weak) IBOutlet UIView *containerView; @end@implementation ViewController- (void)viewDidLoad{