声明button.frame时EXC_BAD_INSTRUCTION

Question

当我试图宣布

时，我收到错误消息 Thread1：EXC_BAD_INSTRUCTION（code = EXC_1386_INVOP，subcode = 0x0）

    var buttonFrame = customButton.frame

这是我的代码。任何帮助表示赞赏。

override func viewDidLoad() {
    super.viewDidLoad()

    //sends menuOverlay to back on load
    parentView.sendSubviewToBack(menuOverlay)
    self.menuOverlay.hidden = true

    //sends sliderContainer back and makes its origin at the button
    let containerFrame = sliderContainer.frame

    let containerFrameX = containerFrame.minX
    let containerFrameY = containerFrame.minY

    var buttonFrame = customButtonOne.frame

    let sliderOriginX = buttonFrame.minX + (buttonFrame.width / 2)
    let containerTranslationX = CGFloat(containerFrameX-sliderOriginX)
    let containerTranslationY = CGFloat(-containerFrameY)

    self.sliderContainer.transform = CGAffineTransformMakeScale(0.001, 0.001)
    self.sliderContainer.transform = CGAffineTransformMakeTranslation(containerTranslationX, containerTranslationY)
}

Answer 1

如果customButtonOne是未连接的IBOutlet，则为nil。 nil没有frame属性，因此崩溃。

确保您的IBOutlet已连接。