LeftAlignedSearchBar.swift

import Foundation
import UIKit

@objc public class LeftAlignedSearchBar: UISearchBar, UISearchBarDelegate {
	override public var placeholder:String? {
		didSet {
			if #available(iOS 9.0, *) {
				if let text = placeholder {
					if text.characters.last! != " " {
						let attr = UITextField.appearanceWhenContainedInInstancesOfClasses([LeftAlignedSearchBar.self]).defaultTextAttributes
						let maxSize = CGSizeMake(self.bounds.size.width - 86, 40)
						let widthText = text.boundingRectWithSize( maxSize, options: .UsesLineFragmentOrigin, attributes:attr, context:nil).size.width
						let widthSpace = " ".boundingRectWithSize( maxSize, options: .UsesLineFragmentOrigin, attributes:attr, context:nil).size.width
						let spaces = floor((maxSize.width - widthText) / widthSpace)
						let newText = text + ((Array(count: Int(spaces), repeatedValue: " ").joinWithSeparator("")))
						if newText != text {
							placeholder = newText
						}
					}
				}
			}
		}
	}
}