ios - 如何在 iOS Swift 中处理多个 UISlider 值？

Question

我有三个 UISlider 即 slider 1:缩放，slider 2:调整左/右和 slider 3: 调整顶部/底部位置。

调整slider 1(scale)时，调整slider 2(左/右)时scnnode不调整相同的scale值，它减少到原始比例值。

这是我的三个 slider 值的代码:

 @IBAction func didChangedSlider(_ sender: Any) {

    switch slider.value {

    case 0 ... 25 :
        earsNode1.scale    = SCNVector3(0.0011, 0.0011, 0.0011)
        earsNode.scale     = SCNVector3(0.0010, 0.0010, 0.0010)

        earsNode.position  = SCNVector3(-0.08, -0.035, -0.12)
        earsNode1.position = SCNVector3(0.077, -0.035, -0.12)

        isSizeIncreased = false

    case 25 ... 50 :
        earsNode1.scale    = SCNVector3(0.0014, 0.0014, 0.0014)
        earsNode.scale     = SCNVector3(0.0014, 0.0014, 0.0014)

        earsNode.position  = SCNVector3(-0.08, -0.040, -0.12)
        earsNode1.position = SCNVector3(0.077, -0.040, -0.12)

        isSizeIncreased = true

    case 50 ... 75 :

        earsNode1.scale    = SCNVector3(0.002, 0.002, 0.002)
        earsNode.scale     = SCNVector3(0.002, 0.002, 0.002)

        earsNode.position  = SCNVector3(-0.08, -0.050, -0.12)
        earsNode1.position = SCNVector3(0.077, -0.050, -0.12)

        isSizeIncreased = true

    case 75 ... 100 :
        earsNode1.scale    = SCNVector3(0.003, 0.003, 0.003)
        earsNode.scale     = SCNVector3(0.003, 0.003, 0.003)

        earsNode.position  = SCNVector3(-0.08, -0.064, -0.12)
        earsNode1.position = SCNVector3(0.077, -0.064, -0.12)

        isSizeIncreased = true

    default:
        print("slider value \(slider.value)")
    }
}

// slider2 - left/right

@IBAction func didChangedSliderLeftOrRight(_ sender: Any) {

    switch slider2.value {
    case 0 ... 25:

        earsNode.position = SCNVector3(-0.083, -0.035, -0.099)
        earsNode1.position = SCNVector3(0.083, -0.035, -0.099)

    case 25 ... 50:

        earsNode.position = SCNVector3(-0.081, -0.035, -0.099)
        earsNode1.position = SCNVector3(0.081, -0.035, -0.099)

    case 50 ... 75:

        earsNode.position = SCNVector3(-0.077, -0.035, -0.099)
        earsNode1.position = SCNVector3(0.077, -0.035, -0.099)

    case 75 ... 100:

        earsNode.position = SCNVector3(-0.073, -0.035, -0.099)
        earsNode1.position = SCNVector3(0.073, -0.035, -0.099)

    default:
        print("slider2 value \(slider2.value)")

    }
}

// slider3 - top/bottom

@IBAction func didChangedSliderTopOrBottom(_ sender: Any) {

    switch slider3.value {
    case 0 ... 25:


        earsNode.position = SCNVector3(-0.079, -0.027, -0.099)
        earsNode1.position = SCNVector3(0.079, -0.027, -0.099)

    case 25 ... 50:


        earsNode.position = SCNVector3(-0.079, -0.031, -0.099)
        earsNode1.position = SCNVector3(0.079, -0.031, -0.099)

        if isSizeIncreased {

            earsNode.position  = SCNVector3(-0.08, -0.040, -0.12)
            earsNode1.position = SCNVector3(0.077, -0.040, -0.12)
        }

    case 50 ... 75:


        earsNode.position = SCNVector3(-0.079, -0.035, -0.099)
        earsNode1.position = SCNVector3(0.079, -0.035, -0.099)

        if isSizeIncreased {

            earsNode.position  = SCNVector3(-0.08, -0.054, -0.12)
            earsNode1.position = SCNVector3(0.077, -0.054, -0.12)
        }

    case 75 ... 100:


        earsNode.position = SCNVector3(-0.079, -0.039, -0.099)
        earsNode1.position = SCNVector3(0.079, -0.039, -0.099)

        if isSizeIncreased {

            earsNode.position  = SCNVector3(-0.08, -0.060, -0.12)
            earsNode1.position = SCNVector3(0.077, -0.060, -0.12)
        }

    default:
        print("slider3 value \(slider3.value)")

    }
  }
}

这是我的截图

我的问题是当用户更改任何 slider 值时，它不会从 slider 调整的最后位置发生变化。 应从已调整的位置调整 slider 值。

Answer 1

在 Xcode 中复制/粘贴并保存此文件 https://gist.github.com/jeremyconkin/a3909b2d3276d1b6fbff02cefecd561a

在 slider 中使用矢量数学时(我只重写第一个):

@IBAction func didChangedSlider(_ sender: Any) {

switch slider.value {

case 0 ... 25 :
    earsNode1.scale    += SCNVector3(0.0011, 0.0011, 0.0011)
    earsNode.scale     += SCNVector3(0.0010, 0.0010, 0.0010)

    earsNode.position  += SCNVector3(-0.08, -0.035, -0.12)
    earsNode1.position += SCNVector3(0.077, -0.035, -0.12)

    isSizeIncreased = false

case 25 ... 50 :
    earsNode1.scale    += SCNVector3(0.0014, 0.0014, 0.0014)
    earsNode.scale     += SCNVector3(0.0014, 0.0014, 0.0014)

    earsNode.position  += SCNVector3(-0.08, -0.040, -0.12)
    earsNode1.position += SCNVector3(0.077, -0.040, -0.12)

    isSizeIncreased = true

case 50 ... 75 :

    earsNode1.scale    += SCNVector3(0.002, 0.002, 0.002)
    earsNode.scale     += SCNVector3(0.002, 0.002, 0.002)

    earsNode.position  += SCNVector3(-0.08, -0.050, -0.12)
    earsNode1.position += SCNVector3(0.077, -0.050, -0.12)

    isSizeIncreased = true

case 75 ... 100 :
    earsNode1.scale    += SCNVector3(0.003, 0.003, 0.003)
    earsNode.scale     += SCNVector3(0.003, 0.003, 0.003)

    earsNode.position  += SCNVector3(-0.08, -0.064, -0.12)
    earsNode1.position += SCNVector3(0.077, -0.064, -0.12)

    isSizeIncreased = true

default:
    print("slider value \(slider.value)")
}