爲什麼不是這種形狀動畫？

Question

我很難過爲什麼這個形狀不會生成其他路徑。我試過演示CABasicAnimations哪些工作..如果任何人有任何想法，將是驚人的！

#import "AKTabBar.h" 

@implementation AKTabBar 

- (id)initWithFrame:(CGRect)frame 
{ 
    self = [super initWithFrame:frame]; 
    if (self) { 
     // Initialization code 
     //customize tab bar 
    } 
    return self; 
} 

-(void)awakeFromNib { 
    CAShapeLayer* tabBarShape = [CAShapeLayer layer]; 


    UIBezierPath* discoverPath = [UIBezierPath bezierPath]; 
    [discoverPath moveToPoint: CGPointMake(0, 98)]; 
    [discoverPath addLineToPoint: CGPointMake(0, 98)]; 
    [discoverPath addLineToPoint: CGPointMake(0, -0)]; 
    [discoverPath addLineToPoint: CGPointMake(27.91, -0)]; 
    [discoverPath addLineToPoint: CGPointMake(34, 7)]; 
    [discoverPath addLineToPoint: CGPointMake(39.78, -0)]; 
    [discoverPath addLineToPoint: CGPointMake(320, -0)]; 
    [discoverPath addLineToPoint: CGPointMake(320, 98)]; 
    [discoverPath closePath]; 


    UIBezierPath* sharePath = [UIBezierPath bezierPath]; 
    [sharePath moveToPoint: CGPointMake(0, 98)]; 
    [sharePath addLineToPoint: CGPointMake(0, 98)]; 
    [sharePath addLineToPoint: CGPointMake(0, -0)]; 
    [sharePath addLineToPoint: CGPointMake(40, -0)]; 
    [sharePath addLineToPoint: CGPointMake(47, 7)]; 
    [sharePath addLineToPoint: CGPointMake(39.78, -0)]; 
    [sharePath addLineToPoint: CGPointMake(320, -0)]; 
    [sharePath addLineToPoint: CGPointMake(200, 98)]; 
    [sharePath closePath]; 

    tabBarShape.path=discoverPath.CGPath; 
    tabBarShape.fillColor = [UIColor redColor].CGColor; 

// UIImageView* menu = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tabBarBackground"]]; 
    [self.layer addSublayer:tabBarShape]; 
// menu.layer.mask=tabBarShape; 
// [ self addSubview:menu]; 


    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"discoverPath"]; 
    animation.duration = 4.0; 
    animation.toValue = (__bridge id)(sharePath.CGPath); 
    [tabBarShape addAnimation:animation forKey:@"discoverPath"]; 


} 


@end 

Answer 1

你CABasicAnimation試圖在CAShapeLayer動畫屬性discoverPath。但是，CAShapeLayer沒有這種屬性。

如果你這樣做會發生什麼？

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"path"];