RZLImageVIew.swift

//
//  UserProfileImageView.swift
//  Rezli
//
//  Created by Cory D. Wiles on 7/27/16.
//  Copyright © 2016 Rezli. All rights reserved.
//

import Foundation

private let UserProfileImageViewWidth: CGFloat = 87.5
private let UserProfileImageViewHeight: CGFloat = 87.5

final class UserProfileImageView: UIImageView {
    
    // MARK: Initializers
    
    override init(frame: CGRect) {
        
        super.init(frame: frame)
        
        let defaultImage: UIImage = UIImage(named: "default_profile_cover")!
        
        self.image = defaultImage
        self.translatesAutoresizingMaskIntoConstraints = false
        self.contentMode = .ScaleAspectFill
        
        self.layer.borderColor = RZLStyleGuideManager.rezliWhite().CGColor
        self.layer.borderWidth = 5.0
        self.layer.masksToBounds = true
        
        self.setContentHuggingPriority(UILayoutPriorityDefaultHigh, forAxis: .Vertical)
        self.setContentHuggingPriority(UILayoutPriorityDefaultHigh, forAxis: .Horizontal)
        
        self.setContentCompressionResistancePriority(UILayoutPriorityDefaultHigh, forAxis: .Vertical)
        self.setContentCompressionResistancePriority(UILayoutPriorityDefaultHigh, forAxis: .Horizontal)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    convenience init() {
        self.init(frame: CGRectZero)
    }
    
    // MARK: Overrides
    
    override func layoutSubviews() {
        
        super.layoutSubviews()
        self.bounds = CGRect(x: 0,
                             y: 0,
                             width: self.intrinsicContentSize().width,
                             height: self.intrinsicContentSize().height)
        
        self.layer.cornerRadius = self.bounds.size.width / 2
        super.layoutSubviews()
    }
    
    override func intrinsicContentSize() -> CGSize {
        return CGSizeMake(UserProfileImageViewWidth, UserProfileImageViewHeight)
    }
}

/// SNIPPET OF IMPLEMENTATION

       /// ScrollView
        
        self.view.rezli_pinAllEdgesOfSubview(self.scrollView)
        
        /// Header View
        
        self.headerLabel.leftAnchor.constraintEqualToAnchor(self.scrollView.contentView.leftAnchor).active = true
        self.headerLabel.rightAnchor.constraintEqualToAnchor(self.scrollView.contentView.rightAnchor).active = true
        self.headerLabel.topAnchor.constraintEqualToAnchor(self.scrollView.contentView.topAnchor, constant: HeadingSpacing).active = true
        
        /// Upload Avatar Label
        
        self.uploadAvatarHeaderLabel.leftAnchor.constraintEqualToAnchor(margins.leftAnchor).active = true
        self.uploadAvatarHeaderLabel.topAnchor.constraintEqualToAnchor(self.headerLabel.bottomAnchor, constant: HeadingSpacing).active = true
        self.uploadAvatarHeaderLabel.rightAnchor.constraintEqualToAnchor(margins.rightAnchor).active = true
        
        /// Profile Image
        
        self.profileImageView.leftAnchor.constraintEqualToAnchor(self.uploadAvatarHeaderLabel.leftAnchor).active = true
        self.profileImageView.topAnchor.constraintEqualToAnchor(self.uploadAvatarHeaderLabel.bottomAnchor, constant: DefaultOffset).active = true