如何在xib的tableviewcell中实现星级评分。
目前我已经按照他的链接使用了。
https://github.com/glenyi/FloatRatingView
我有tableviewcell。在tableviewcell中，我使用了一个uiview并将类设置为FloatingRatingView。 然后我已经在tableview.in中列出了该单元格 这是代码： 在tableviewcell中：-
@IBOutlet var floatRatingView: FloatRatingView!
FloatingRatingView文件：-
import UIKit
@objc public protocol FloatRatingViewDelegate {
/// Returns the rating value when touch events end
@objc optional func floatRatingView(_ ratingView: FloatRatingView, didUpdate rating: Double)
/// Returns the rating value as the user pans
@objc optional func floatRatingView(_ ratingView: FloatRatingView, isUpdating rating: Double)
}
///一个简单的评级视图，可以设置整个，一半或浮点评级。
@IBDesignable
open class FloatRatingView: UIView {
var rate:Double?
// MARK: Properties
open weak var delegate: FloatRatingViewDelegate?
/// Array of empty image views
private var emptyImageViews: [UIImageView] = []
/// Array of full image views
private var fullImageViews: [UIImageView] = []
/// Sets the empty image (e.g. a star outline)
@IBInspectable open var emptyImage: UIImage? {
didSet {
// Update empty image views
for imageView in emptyImageViews {
imageView.image = emptyImage
}
refresh()
}
}
/// Sets the full image that is overlayed on top of the empty image.
/// Should be same size and shape as the empty image.
@IBInspectable open var fullImage: UIImage? {
didSet {
// Update full image views
for imageView in fullImageViews {
imageView.image = fullImage
}
refresh()
}
}
/// Sets the empty and full image view content mode.
open var imageContentMode: UIViewContentMode = UIViewContentMode.scaleAspectFit
/// Minimum rating.
@IBInspectable open var minRating: Int = 0 {
didSet {
// Update current rating if needed
if rating < Double(minRating) {
rating = Double(minRating)
print(rating)
refresh()
}
}
}
/// Max rating value.
@IBInspectable open var maxRating: Int = 5 {
didSet {
if maxRating != oldValue {
removeImageViews()
initImageViews()
// Relayout and refresh
setNeedsLayout()
refresh()
}
}
}
/// Minimum image size.
@IBInspectable open var minImageSize: CGSize = CGSize(width: 5.0, height: 5.0)
/// Set the current rating.
@IBInspectable open var rating: Double = 0 {
didSet {
if rating != oldValue {
refresh()
}
}
}
/// Sets whether or not the rating view can be changed by panning.
@IBInspectable open var editable: Bool = true
// MARK: Type
@objc public enum FloatRatingViewType: Int {
/// Integer rating
case wholeRatings
/// Double rating in increments of 0.5
case halfRatings
/// Double rating
case floatRatings
/// Returns true if rating can contain decimal places
func supportsFractions() -> Bool {
return self == .halfRatings || self == .floatRatings
}
}
/// Float rating view type
@IBInspectable open var type: FloatRatingViewType = .wholeRatings
// MARK: Initializations
required override public init(frame: CGRect) {
super.init(frame: frame)
initImageViews()
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
initImageViews()
}
// MARK: Helper methods
private func initImageViews() {
guard emptyImageViews.isEmpty && fullImageViews.isEmpty else {
return
}
// Add new image views
for _ in 0..<maxRating {
let emptyImageView = UIImageView()
emptyImageView.contentMode = imageContentMode
emptyImageView.image = emptyImage
emptyImageViews.append(emptyImageView)
addSubview(emptyImageView)
let fullImageView = UIImageView()
fullImageView.contentMode = imageContentMode
fullImageView.image = fullImage
fullImageViews.append(fullImageView)
addSubview(fullImageView)
}
}
private func removeImageViews() {
// Remove old image views
for i in 0..<emptyImageViews.count {
var imageView = emptyImageViews[i]
imageView.removeFromSuperview()
imageView = fullImageViews[i]
imageView.removeFromSuperview()
}
emptyImageViews.removeAll(keepingCapacity: false)
fullImageViews.removeAll(keepingCapacity: false)
}
// Refresh hides or shows full images
private func refresh() {
for i in 0..<fullImageViews.count {
let imageView = fullImageViews[i]
if rating >= Double(i+1) {
imageView.layer.mask = nil
imageView.isHidden = false
} else if rating > Double(i) && rating < Double(i+1) {
// Set mask layer for full image
let maskLayer = CALayer()
maskLayer.frame = CGRect(x: 0, y: 0, width: CGFloat(rating-Double(i))*imageView.frame.size.width, height: imageView.frame.size.height)
maskLayer.backgroundColor = UIColor.black.cgColor
imageView.layer.mask = maskLayer
imageView.isHidden = false
} else {
imageView.layer.mask = nil;
imageView.isHidden = true
}
}
}
// Calculates the ideal ImageView size in a given CGSize
private func sizeForImage(_ image: UIImage, inSize size: CGSize) -> CGSize {
let imageRatio = image.size.width / image.size.height
let viewRatio = size.width / size.height
if imageRatio < viewRatio {
let scale = size.height / image.size.height
let width = scale * image.size.width
return CGSize(width: width, height: size.height)
} else {
let scale = size.width / image.size.width
let height = scale * image.size.height
return CGSize(width: size.width, height: height)
}
}
// Calculates new rating based on touch location in view
private func updateLocation(_ touch: UITouch) {
guard editable else {
return
}
let touchLocation = touch.location(in: self)
var newRating: Double = 0
for i in stride(from: (maxRating-1), through: 0, by: -1) {
let imageView = emptyImageViews[i]
guard touchLocation.x > imageView.frame.origin.x else {
continue
}
// Find touch point in image view
let newLocation = imageView.convert(touchLocation, from: self)
// Find decimal value for float or half rating
if imageView.point(inside: newLocation, with: nil) && (type.supportsFractions()) {
let decimalNum = Double(newLocation.x / imageView.frame.size.width)
newRating = Double(i) + decimalNum
print(newRating)
if type == .halfRatings {
newRating = Double(i) + (decimalNum > 0.75 ? 1 : (decimalNum > 0.25 ? 0.5 : 0))
}
} else {
// Whole rating
newRating = Double(i) + 1.0
}
break
}
// Check min rating
rating = newRating < Double(minRating) ? Double(minRating) : newRating
print(rating)
self.rate = rating
// Update delegate
delegate?.floatRatingView?(self, isUpdating: rating)
}
// MARK: UIView
// Override to calculate ImageView frames
override open func layoutSubviews() {
super.layoutSubviews()
guard let emptyImage = emptyImage else {
return
}
let desiredImageWidth = frame.size.width / CGFloat(emptyImageViews.count)
let maxImageWidth = max(minImageSize.width, desiredImageWidth)
let maxImageHeight = max(minImageSize.height, frame.size.height)
let imageViewSize = sizeForImage(emptyImage, inSize: CGSize(width: maxImageWidth, height: maxImageHeight))
let imageXOffset = (frame.size.width - (imageViewSize.width * CGFloat(emptyImageViews.count))) /
CGFloat((emptyImageViews.count - 1))
for i in 0..<maxRating {
let imageFrame = CGRect(x: i == 0 ? 0 : CGFloat(i)*(imageXOffset+imageViewSize.width), y: 0, width: imageViewSize.width, height: imageViewSize.height)
var imageView = emptyImageViews[i]
imageView.frame = imageFrame
imageView = fullImageViews[i]
imageView.frame = imageFrame
}
refresh()
}
// MARK: Touch events
override open func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else {
return
}
updateLocation(touch)
}
override open func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
guard let touch = touches.first else {
return
}
updateLocation(touch)
}
override open func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
// Update delegate
delegate?.floatRatingView?(self, didUpdate: rating)
}
override open func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
// Update delegate
delegate?.floatRatingView?(self, didUpdate: rating)
}
}
这是我提到的链接中使用的文件。因此tableviewcell和cellforrowat tableview中的代码应该给出。评级值如何迅速进入cellforrow中