• 能干嘛？
  你想顯示一個(gè)大圖層里面的一小部分，如：查看大圖片，查看一大段數(shù)據(jù)或者長(zhǎng)文本。
• 拿啥來(lái)干？

- (void)scrollPoint:(CGPoint)p;  

• 局限
  能像scrollView滾動(dòng)視圖，但并不能有滾動(dòng)條以及有明確的滾動(dòng)范圍以及其他scrollView的效果( 可能滑動(dòng)過(guò)程中，讓視圖整體滑出視野)

• 代碼示例
  view繼承的類：

@implementation shapeView

+ (Class)layerClass {
    return [CAScrollLayer class];
}

- (void)setUp {
    self.layer.masksToBounds = YES;
    
    UIPanGestureRecognizer *recognizer = nil;
    recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [self addGestureRecognizer:recognizer];
}

- (id)initWithFrame:(CGRect)frame {
    if((self = [super initWithFrame:frame])) {
        [self setUp];
    }
    return self;
}

- (void)awakeFromNib {
    [self setUp];
}

- (void)pan:(UIPanGestureRecognizer *)recognizer {
    CGPoint offset = self.bounds.origin;
    offset.x -= [recognizer translationInView:self].x;
    offset.y -= [recognizer translationInView:self].y;
    
    [(CAScrollLayer *)self.layer scrollToPoint:offset];
    
    [recognizer setTranslation:CGPointZero inView:self];
}
@end

viewController:

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIImage *image = [UIImage imageNamed:@"00000"];
    UIImageView *iv = [[UIImageView alloc] initWithImage:image];
    [self.clipView addSubview:iv];  
}

效果圖：

效果圖.png