ios - Swift iOS - 使用 CATransform3D .m34 属性更改 Swift 中的透视图时应用额外的更改

Question

我正在读一本关于动画iOS Core Animation: Advanced Techniques的书。这本书是用Objective C编写的。我对Objective C并不流利。我了解.m34属性的作用，但是当我将本书的代码应用于Swift时，视角并没有改变。问题是我似乎无法像这里解释的那样添加到现有的转换中。

我的代码：

var tranform = CATransform3DIdentiy
transfrom.m34 = -1 / 500
transform = CATransform3DMakerotation(CGFloat(Double.pi/4), 0, 1, 0) // this is just creating a new transform instead of adding to the existing one
viewIwantTransformed.layer.transfrom = transform

书籍代码：

@implementation ViewController 
- (void) viewDidLoad 

 { [super viewDidLoad]; 

   // create a new transform CATransform3D 
   transform = CATransform3DIdentity;

   // apply perspective 
   transform.m34 = - 1.0 / 500.0; 

  // rotate by 45 degrees along the Y axis
  transform = CATransform3DRotate( transform, M_PI_4, 0, 1, 0);

  // apply to layer 
  self.viewIwantTransformed.layer.transform = transform; 

} @end

结果

标签： iosswiftcatransform3d

Answer 1

尝试这个

transform = CATransform3DRotate(transform, M_PI_4, 0, 1, 0) 

而是由

transform = CATransform3DMakerotation(CGFloat(Double.pi/4, 0, 1, 0)