字符串与Bash输出的比较

Question

我有一个效果很好的简单脚本（并打印hello）

variable=false
if [ "$variable" = "false" ]; then
    echo hello
fi

但是，这不起作用（并且不会打印hello）

variable=$(source script.sh \
           | awk -F":" '/maintenanceMode\>/ { print $2i }' \
           | sed 's/,//g'
          )
echo $variable     # prints `false`, as expected
if [ "$variable" = "false" ]; then
    echo hello
fi

我错过了什么？

Answer 1

从变量中删除空格。

@objc func xButtonWasDragged(_ sender: UIPanGestureRecognizer) {
    if sender.state == UIGestureRecognizerState.began || sender.state == UIGestureRecognizerState.changed {
        self.view.bringSubview(toFront: xButton)
        let translation = sender.translation(in: self.view)
        //Move the view
        xButton.center = CGPoint(x: xButton.center.x + translation.x, y: xButton.center.y)
        distanceCounter += translation.x
        //if moved left dont add to our distance counter
        if distanceCounter < 0 {
            distanceCounter = 0
        }
        // prevent button from moving left from start
        if xButton.center.x < startingPointxBtn {
            xButton.center.x = startingPointxBtn
        } else if xButton.center.x > largeCircle.center.x && distanceCounter > xBtnDistance {
            xButton.center.x = largeCircle.center.x
            distanceCounter = xBtnDistance
            // If we hit our target center and go over it in our distance counter
            // make our distance be reached and forced to the center
        } else {
            // set the translation
            sender.setTranslation(CGPoint.zero, in: self.view)
        }
    } else if sender.state == UIGestureRecognizerState.ended {
        // If you let go of button within a distance, snap to center
        if largeCircle.center.x - xButton.center.x <= 35.0 {
            xButton.center = largeCircle.center
        } else {
            // if none of these conditions meet make it snap to start
            xButton.center.x = startingPointxBtn
        }
        // reset our counter to always begin with zero
        distanceCounter = 0
    }
}