Swift Autolayout Assistant UIView. Can also be applied to UITableView. See an example use case scenario on http://stackoverflow.com/questions/31907014/ Copyright (c) 2015 Xavier Schott. All rights reserved. MIT License.

ImageViewLayoutAssistant.swift

//
//  ImageViewLayoutAssistant.swift
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import UIKit

@IBDesignable class ImageViewLayoutAssistant: UIImageView {
    
    @IBInspectable var border:Bool = true
    @IBInspectable var crosshair:Bool = true
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        // Border
        if border {
            self.layer.borderWidth = 1
            self.layer.borderColor = ((nil == tintColor)
                ? UIColor(red: 0x0D/255, green: 0x94/255, blue: 0xFC/255, alpha: 1)
                : tintColor).CGColor
        }
    }

    override func drawRect(rect: CGRect) {
        let ctx = UIGraphicsGetCurrentContext()
        CGContextSaveGState(ctx)
        
        CGContextSetStrokeColorWithColor(ctx, ((nil == tintColor)
            ? UIColor(red: 0x0D/255, green: 0x94/255, blue: 0xFC/255, alpha: 1)
            : tintColor).CGColor)
        CGContextSetLineWidth( ctx, 1.0)
        
        // Crosshair
        if crosshair {
            CGContextMoveToPoint( ctx, 0, 0)
            CGContextAddLineToPoint( ctx, bounds.size.width, bounds.size.height)
            CGContextMoveToPoint( ctx, 0, bounds.size.height)
            CGContextAddLineToPoint( ctx, bounds.size.width, 0)
            CGContextStrokePath(ctx)
        }
        
        CGContextRestoreGState(ctx)
    }
}

TableViewLayoutAssistant.swift

//
//  TableViewLayoutAssistant.swift
//
//  Copyright (c) 2015 Xavier Schott. All rights reserved.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import UIKit

@IBDesignable class TableViewLayoutAssistant: UITableView {
    @IBInspectable var border:Bool = true
    @IBInspectable var crosshair:Bool = true
    
    override func drawRect(rect: CGRect) {
        let ctx = UIGraphicsGetCurrentContext()
        CGContextSaveGState(ctx)
        
        CGContextSetStrokeColorWithColor(ctx, ((nil == tintColor)
            ? UIColor(red: 0x0D/255, green: 0x94/255, blue: 0xFC/255, alpha: 1)
            : tintColor).CGColor)
        CGContextSetLineWidth( ctx, 1.0)
        
        // Border
        if border {
            CGContextStrokeRect(ctx, bounds.insetBy(dx: 1, dy: 1))
        }
        
        // Crosshair
        if crosshair {
            CGContextMoveToPoint( ctx, 0, 0)
            CGContextAddLineToPoint( ctx, bounds.size.width, bounds.size.height)
            CGContextMoveToPoint( ctx, 0, bounds.size.height)
            CGContextAddLineToPoint( ctx, bounds.size.width, 0)
            CGContextStrokePath(ctx)
        }
        
        CGContextRestoreGState(ctx)
    }
}

ViewLayoutAssistant.swift

//
//  ViewLayoutAssistant.swift
//
//  Copyright (c) 2015 Xavier Schott. All rights reserved.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import UIKit

@IBDesignable class ViewLayoutAssistant: UIView {
    @IBInspectable var border:Bool = true
    @IBInspectable var crosshair:Bool = true
    
    override func drawRect(rect: CGRect) {
        let ctx = UIGraphicsGetCurrentContext()
        CGContextSaveGState(ctx)
        
        CGContextSetStrokeColorWithColor(ctx, ((nil == tintColor)
            ? UIColor(red: 0x0D/255, green: 0x94/255, blue: 0xFC/255, alpha: 1)
            : tintColor).CGColor)
        CGContextSetLineWidth( ctx, 1.0)
        
        // Border
        if border {
            CGContextStrokeRect(ctx, bounds.rectByInsetting(dx: 1, dy: 1))
        }
        
        // Crosshair
        if crosshair {
            CGContextMoveToPoint( ctx, 0, 0)
            CGContextAddLineToPoint( ctx, bounds.size.width, bounds.size.height)
            CGContextMoveToPoint( ctx, 0, bounds.size.height)
            CGContextAddLineToPoint( ctx, bounds.size.width, 0)
            CGContextStrokePath(ctx)
        }
        
        CGContextRestoreGState(ctx)
    }
}

Visualize the exact layout of UIImageView, UITableView and UIView in Interface Builder or within your application at development stage. A simple tool to help reduce caffeine intake and chronic hair loss.

In action in Interface Builder:

IBDesignable: