zsisme / ios_core_animation_advanced_techniques Goto Github PK

按钮和表情都是白色背景
"表情"应为标签

代码的注释错了
- (void)viewDidLoad { [super viewDidLoad]; //create a new transform CGAffineTransform transform = CGAffineTransformIdentity; //scale by 50% transform = CGAffineTransformScale(transform, 0.5, 0.5); //rotate by 30 degrees transform = CGAffineTransformRotate(transform, M_PI / 180.0 * 30.0); //translate by 200 points transform = CGAffineTransformTranslate(transform, 200, 0); //apply transform to layer self.layerView.layer.affineTransform = transform; }

应该为
- (void)viewDidLoad { [super viewDidLoad]; CGAffineTransform transform = CGAffineTransformIdentity;//create a new transform transform = CGAffineTransformScale(transform, 0.5, 0.5); //scale by 50% transform = CGAffineTransformRotate(transform, M_PI / 180.0 * 30.0); //rotate by 30 degrees transform = CGAffineTransformTranslate(transform, 200, 0);//translate by 200 points //apply transform to layer self.layerView.layer.affineTransform = transform; }

rt

CATransform3D中m34在矩阵的实际位置应该是第三行第四列,而不是图5.9中的第四行第三列

已为本书整合官方源码和素材,仓库地址 https://github.com/cocos543/iOS-Core-Animation-Advanced-Techniques-Resource
欢迎Star

41页图3.3附近关于anchorPoint的描述

Xcode8关于anchorPoint的注释

/* Defines the anchor point of the layer's bounds rect, as a point in
* normalized layer coordinates - '(0, 0)' is the bottom left corner of
* the bounds rect, '(1, 1)' is the top right corner. Defaults to
* '(0.5, 0.5)', i.e. the center of the bounds rect. Animatable. */

@Property CGPoint anchorPoint;

到底哪里出了问题^_^

在gitBook上无法看到13章的图13_2、13_3、13_4图片

第八章显式动画直接从属性动画的CAAnimationDelegate开始翻译，缺失了属性动画的基础动画块的翻译

在下载EPUB的电子书时，有很多图片缺失～

这个翻译很不错，但就是代码太长的时候虽然有滚动条但是没办法拖动，代码也就没办法预览到。

注意当调用图层的-hitTest:方法时，测算的顺序严格依赖于图层树当中的图层顺序（和UIView处理事件类似）。之前提到的zPosition属性可以明显改变屏幕上图层的顺序，但不能改变事件传递的顺序。
这意味着如果改变了图层的z轴顺序，你会发现将不能够检测到最前方的视图点击事件，这是因为被另一个图层遮盖住了，虽然它的zPosition值较小，但是在图层树中的顺序靠前。我们将在第五章详细讨论这个问题。

论述说 改变zPosition值不会改变 hitTest:方法的返回值，但是经过如下示例代码测试，发现改变zPosition值会改变 hitTest:方法的返回值。

示例代码：

- (void)addSomeLayers{
    self.tempLayer = [CALayer layer];
    self.tempLayer.backgroundColor = [UIColor blueColor].CGColor;
    self.tempLayer.frame = CGRectMake(100, 100, 200, 200);
    [self.view.layer addSublayer:self.tempLayer];
    
    self.redLayer = [CALayer layer];
    self.redLayer.backgroundColor = [UIColor redColor].CGColor;
    self.redLayer.frame = CGRectMake(50, 50, 50, 50);
    [self.tempLayer addSublayer:self.redLayer];
    
    self.yellowLayer = [CALayer layer];
    self.yellowLayer.backgroundColor = [UIColor yellowColor].CGColor;
    self.yellowLayer.frame = CGRectMake(75, 75, 100, 100);
    [self.tempLayer addSublayer:self.yellowLayer];
    
    self.redLayer.zPosition = 1;
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    UITouch *anyTouch = [touches anyObject];
    CGPoint point = [anyTouch locationInView:self.view];
    
    CALayer *layer = [self.view.layer hitTest:point];
    
    
    
    if (layer == self.tempLayer) {
        NSLog(@"touch blue layer");
    }
    else if (layer == self.view.layer){
        NSLog(@"touch self.view.layer");
    }
    else if(layer == self.redLayer){
        NSLog(@"touch red layer");
    }
    else if(layer == self.yellowLayer){
        NSLog(@"touch yellow layer");
    }
}

在self.tempLayer上先后添加了self.redLayer和self.yellowLayer，图层树中的顺序应该是self.yellowLayer在最上面，但是通过self.redLayer.zPosition = 1;改变self.redLayer的显示顺序后，hitTest:方法返回了self.redLayer

第二行原文：Note that there is no depth property to complement the bounds width and height.
翻译成了更深的属性。原文值的是“厚度”概念，类似于Thickness，说明layer 是扁平的，在z轴方向没有“纵深”。

应翻译成：用户界面不能仅由图片构成

“因此，通常会用3×3（而不是2×3）的矩阵来做二维变换，你可能会见到3行2列格式的矩阵，这是所谓的以列为主的格式，图5.1所示的是以行为主的格式，只要能保持一致，用哪种格式都无所谓。”

这个，括号里面应该是“3x2”。

这本书还会更新吗？

请问有办法可以拿到书中图片资源吗

这一张内容为空，在github中的md文件也只有目录。

我仔细看了下代码，按照那里的写法的确能够成功执行。但是我发现

- (void)setAngle:(CGFloat)angle forHand:(UIView *)handView animated:(BOOL)animated
{
    //generate transform
    CATransform3D transform = CATransform3DMakeRotation(angle, 0, 0, 1);
    if (animated) {
        //create transform animation
        CABasicAnimation *animation = [CABasicAnimation animation];
        [self updateHandsAnimated:NO];
        animation.keyPath = @"transform";
        animation.toValue = [NSValue valueWithCATransform3D:transform];
        animation.duration = 0.5;
        animation.delegate = self;
        [animation setValue:handView forKey:@"handView"];
        [handView.layer addAnimation:animation forKey:nil];
    } else {
        //set transform directly
        handView.layer.transform = transform;
    }
}

这段代码里面 修改成

- (void)setAngle:(CGFloat)angle forHand:(UIView *)handView animated:(BOOL)animated
{
    //generate transform
    CATransform3D transform = CATransform3DMakeRotation(angle, 0, 0, 1);
    handView.layer.transform = transform;
}

一样能成功执行，因为以上代码主要的作用只是做了一个transform转换，并没有达到CABasicAnimation的目的。我觉得其实作者想要实现的效果应该是

- (void)setAngle:(CGFloat )angle forHand:(UIImageView *)handView animated:(BOOL)animated
{
    CATransform3D transform = CATransform3DMakeRotation(angle, 0, 0, 1);
    if (animated) {
        CABasicAnimation *animation = [CABasicAnimation animation];
        animation.keyPath = @"transform";
        animation.toValue = [NSValue valueWithCATransform3D:transform];
        animation.duration = 0.5;
        animation.fillMode = kCAFillModeForwards;
        animation.removedOnCompletion = NO;
        [handView.layer addAnimation:animation forKey:nil];
    }
    else
    {
        handView.layer.transform = transform;
    }
}

作者可以参考下

第5章变换 5.3 “固体对象”的部分内容重复了 5.2 “3D变换”的内容，有空修正一下下吧～

图层几何学--》锚点 没有内容。我下载了pdf和epub都没有。在线的也没有（或者是不是章节对应有问题）

@Property (nonatomic, weak) IBOutlet CALayer *colorLayer;
这行代码错误，首先不需要IBOutlet，同时不应该采用weak来保存对象，否则程序无法正常运行。
应该改成
@Property (nonatomic, strong) CALayer *colorLayer;

错别字
文章结尾处"已近",是不是应为“已经”

直接用书上的代码，取得的两个点坐标不对，需改成如下：

float p1[2];
float p2[2];
[func getControlPointAtIndex:1 values:(float *)&p1];
[func getControlPointAtIndex:2 values:(float *)&p2];    
CGPoint point1 = CGPointMake(p1[0], p1[1]);
CGPoint point2 = CGPointMake(p2[0], p2[1]);

你寄宿图那章说调用-drawRect:和- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx;都会创建寄宿图。我测试了一下在UIView（frame特别大）的时候重写-drawRect:内存急剧飙升确实应该产生了寄宿图。但是在测试layer的时候调用了- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx;内存并没有上升很多啊，感觉好像没有创建寄宿图的样子。

3D变换中，透视部分为什么采用CATransform3DMakeRotation函数没有作用，也设置了m34。但换成CATransform3Drotate属性则有作用

Figure 2.6 A custom contentsRect (left) and the displayed contents (right) 这个图片说明的翻译：图2.6 一个自定义的contentsRect（左）和之后（配置之后）显示的内容

报错信息如下,处理了很久不知道是什么原因,希望能给与解答.谢谢.
Undefined symbols for architecture arm64:
"_cpSpaceStep", referenced from:
-[ZJBKAnimationWithTimerVC stepBox:] in ZJBKAnimationWithTimerVC.o
"_cpSpaceEachShape", referenced from:
-[ZJBKAnimationWithTimerVC stepBox:] in ZJBKAnimationWithTimerVC.o
"_cpSpaceNew", referenced from:
-[ZJBKAnimationWithTimerVC p_physicalEngine] in ZJBKAnimationWithTimerVC.o
"_cpSpaceAddBody", referenced from:
-[ZJBKAnimationWithTimerVC p_physicalEngine] in ZJBKAnimationWithTimerVC.o
"_cpShapeFree", referenced from:
-[ZJCreate dealloc] in ZJCreate.o
"_cpBodyFree", referenced from:
-[ZJCreate dealloc] in ZJCreate.o
"_cpBodyActivate", referenced from:
_cpShapeSetFriction in ZJCreate.o
"_cpBodyNew", referenced from:
-[ZJCreate initWithFrame:] in ZJCreate.o
"_cpMomentForBox", referenced from:
-[ZJCreate initWithFrame:] in ZJCreate.o
"_cpPolyShapeNew", referenced from:
-[ZJCreate initWithFrame:] in ZJCreate.o
"_cpSpaceAddShape", referenced from:
-[ZJBKAnimationWithTimerVC p_physicalEngine] in ZJBKAnimationWithTimerVC.o
"_cpBodySetPos", referenced from:
-[ZJCreate initWithFrame:] in ZJCreate.o
ld: symbol(s) not found for architecture arm64

normal = GLKMatrix3MultiplyVector3(matrix3, normal);
计算出的结果为
(GLKVector3) normal = {
= (s = 0, t = 0, p = 0)
= (s = 0, t = 0, p = 0)
= (s = 0, t = 0, p = 0)
v = ([0] = 0, [1] = 0, [2] = 0)
}

normal = GLKVector3Normalize(normal);
计算出的结果为

(GLKVector3) normal = {
= (s = NaN, t = NaN, p = NaN)
= (s = NaN, t = NaN, p = NaN)
= (s = NaN, t = NaN, p = NaN)
v = ([0] = NaN, [1] = NaN, [2] = NaN)
}

“和CGAffineTransform类似，CATransform3D也是一个矩阵，但是和2x3的矩阵不同，CATransform3D是一个可以在3维空间内做变换的4x4的矩阵（图5.6）”

这里的“2X3”，应该是“3X2”。