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iosobjective-cswiftuicontrol

Expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions

When I compiling the following code:

  override func layoutSubviews() {
    super.layoutSubviews()

    let selectedBackgroundWidth = bounds.width / 2.0 - selectedBackgroundInset * 2.0
    selectedBackgroundView.frame = CGRect(x: selectedBackgroundInset + CGFloat(selectedIndex) * (selectedBackgroundWidth + selectedBackgroundInset * 2.0), y: selectedBackgroundInset, width: selectedBackgroundWidth, height: bounds.height - selectedBackgroundInset * 2.0)

    (titleLabelsContentView.frame, selectedTitleLabelsContentView.frame) = (bounds, bounds)

    let titleLabelMaxWidth = bounds.width / 2.0 - selectedBackgroundInset * 2.0
    let titleLabelMaxHeight = bounds.height - selectedBackgroundInset * 2.0

    let leftTitleLabelSize = leftTitleLabel.sizeThatFits(CGSize(width: titleLabelMaxWidth, height: titleLabelMaxHeight))
    let leftTitleLabelOrigin = CGPoint(x: floor((bounds.width / 2.0 - leftTitleLabelSize.width) / 2.0), y: floor((bounds.height - leftTitleLabelSize.height) / 2.0))
    let leftTitleLabelFrame = CGRect(origin: leftTitleLabelOrigin, size: leftTitleLabelSize)
    (leftTitleLabel.frame, selectedLeftTitleLabel.frame) = (leftTitleLabelFrame, leftTitleLabelFrame)

    let rightTitleLabelSize = rightTitleLabel.sizeThatFits(CGSize(width: titleLabelMaxWidth, height: titleLabelMaxHeight))
    let rightTitleLabelOrigin = CGPoint(x: floor(bounds.size.width / 2.0 + (bounds.width / 2.0 - rightTitleLabelSize.width) / 2.0), y: floor((bounds.height - rightTitleLabelSize.height) / 2.0))
    let rightTitleLabelFrame = CGRect(origin: rightTitleLabelOrigin, size: rightTitleLabelSize)
    (rightTitleLabel.frame, selectedRightTitleLabel.frame) = (rightTitleLabelFrame, rightTitleLabelFrame)
  }

I get the following error: 

Expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions

I tried the code in a different project and it compiles without problems.

How do I solve this problem?

enter image description here

Solution

  • Try to separate your calculation like this:

    let rightTitleLabelSize = rightTitleLabel.sizeThatFits(CGSize(width: titleLabelMaxWidth, height: titleLabelMaxHeight))
let x = floor(bounds.size.width / 2.0 + (bounds.width / 2.0 - rightTitleLabelSize.width) / 2.0)
let y = floor((bounds.height - rightTitleLabelSize.height) / 2.0)
let rightTitleLabelOrigin = CGPoint(x: x, y: y)
let rightTitleLabelFrame = CGRect(origin: rightTitleLabelOrigin, size: rightTitleLabelSize)
(rightTitleLabel.frame, selectedRightTitleLabel.frame) = (rightTitleLabelFrame, rightTitleLabelFrame)