Swift 相当于这个类

Question

我正在尝试实现来自 this 的一些基本 UIGestureRecongnizer 控件教程。我在理解此类并将其翻译成 Swift 3 时遇到了一些问题

interface Transformations : NSObject

- (id)initWithDepth:(float)z Scale:(float)s Translation:(GLKVector2)t Rotation:(GLKVector3)r;
- (void)start;
- (void)scale:(float)s;
- (void)translate:(GLKVector2)t withMultiplier:(float)m;
- (void)rotate:(GLKVector3)r withMultiplier:(float)m;
- (GLKMatrix4)getModelViewMatrix;

@end

(ps:GLK前缀的方法来自苹果的GLKit框架)

class Transformations: NSObject {
    init(Scale: Float, Translation: GLKVector2, Rotation: GLKVector3) {
        func scale(s: Float) {
        }
        func translate(t: GLKVector2, withMultiplier: Float) {
        }
        func rotate(r: GLKVector3, withMultiplier: Float) {
        }

    }
}

到目前为止，情况如何？

这是我试图翻译成 Swift 3 的 .m 文件。

#import "Transformations.h"

@interface Transformations ()
{
    // 1
    // Depth
    float   _depth;
}

@end

@implementation Transformations

- (id)initWithDepth:(float)z Scale:(float)s Translation:(GLKVector2)t     Rotation:(GLKVector3)r
{
    if(self = [super init])
    {
        // 2
        // Depth
        _depth = z;
    }

    return self;
}

- (void)start
{
}

- (void)scale:(float)s
{
}

- (void)translate:(GLKVector2)t withMultiplier:(float)m
{
}

- (void)rotate:(GLKVector3)r withMultiplier:(float)m
{
}

- (GLKMatrix4)getModelViewMatrix
{
    // 3
    GLKMatrix4 modelViewMatrix = GLKMatrix4Identity;
    modelViewMatrix = GLKMatrix4Translate(modelViewMatrix, 0.0f, 0.0f, -_depth);

    return modelViewMatrix;
}

@end

Answer 1

所以你应该翻译 .m 文件。像这样:

class Transformations: NSObject {

    var _depth: Float

    init(z: Float, scale s: Float, translation t: GLKVector2, rotation r: GLKVector3) {
        self._depth = z
    }

    func start() {

    }

    func scale(s: Float) {

    }

    func translate(t: GLKVector2, withMultiplier m: Float) {

    }

    func rotate(r: GLKVector3, withMultiplier m: Float) {

    }

    func getModelViewMatrix() -> GLKMatrix4 {
        var modelViewMatrix = GLKMatrix4Identity
        modelViewMatrix = GLKMatrix4Translate(modelViewMatrix, 0, 0, -_depth)
        return modelViewMatrix
    }

}