[英]Change perspective angle from right to left, in CATransformLayer iOS using CATransform3D
[英]Swift iOS -Apply additional changes to transform when using CATransform3D .m34 property to change perspective in Swift
我正在讀一本有關動畫的書,《 iOS核心動畫:高級技術》 。 本書位於目標C中。我不太精通目標C。我了解.m34屬性的作用,但是當我將本書的代碼應用於Swift時,視角不會改變。 問題是我似乎無法像這里解釋的那樣添加到現有的轉換中。
我的代碼:
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
圖書代碼:
@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
結果
嘗試這個
transform = CATransform3DRotate(transform, M_PI_4, 0, 1, 0)
而是
transform = CATransform3DMakerotation(CGFloat(Double.pi/4, 0, 1, 0)
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