增加Tap to load more

Author: LeoMobileDeveloper

PullToRefreshKit/ConfigHeaderFooterController.swift

@@ -44,7 +44,9 @@ class ConfigDefaultHeaderFooterController: UITableViewController {
             footer.setText("Pull up to refresh", mode: RefreshKitFooterText.pullToRefresh)
             footer.setText("No data any more", mode: RefreshKitFooterText.noMoreData)
             footer.setText("Refreshing...", mode: RefreshKitFooterText.refreshing)
+            footer.setText("Tap to load more", mode: RefreshKitFooterText.tapToRefresh)
             footer.textLabel.textColor  = UIColor.orangeColor()
+            footer.needTapToLoadMore = true
         }
     }
     override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

Source/Classes/Const.swift

@@ -42,6 +42,8 @@ struct PullToRefreshKitFooterString{
     static let pullToRefresh = "上拉加载更多数据"
     static let refreshing = "正在加载中..."
     static let noMoreData = "数据加载完毕"
+    static let tapToRefresh = "数据加载完毕"
+
 }
 
 struct PullToRefreshKitLeftString{

Source/Classes/Footer.swift

@@ -13,13 +13,26 @@ public enum RefreshKitFooterText{
     case pullToRefresh
     case refreshing
     case noMoreData
+    case tapToRefresh
 }
+
 public class DefaultRefreshFooter:UIView,RefreshableFooter{
     public let spinner:UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .Gray)
     public  let textLabel:UILabel = UILabel(frame: CGRectMake(0,0,120,40)).SetUp {
         $0.font = UIFont.systemFontOfSize(14)
         $0.textAlignment = .Center
     }
+    public var needTapToLoadMore = false{
+        didSet{
+            tap.enabled = needTapToLoadMore
+            if needTapToLoadMore{
+                textLabel.text = textDic[.tapToRefresh]
+            }else{
+                textLabel.text = textDic[.pullToRefresh]
+            }
+        }
+    }
+    private var tap:UITapGestureRecognizer!
     private var textDic = [RefreshKitFooterText:String]()
     /**
      This function can only be called before refreshing
@@ -37,28 +50,69 @@ public class DefaultRefreshFooter:UIView,RefreshableFooter{
         textDic[.pullToRefresh] = PullToRefreshKitFooterString.pullToRefresh
         textDic[.refreshing] = PullToRefreshKitFooterString.refreshing
         textDic[.noMoreData] = PullToRefreshKitFooterString.noMoreData
+        textDic[.tapToRefresh] = PullToRefreshKitFooterString.tapToRefresh
         textLabel.text = textDic[.pullToRefresh]
+        tap = UITapGestureRecognizer(target: self, action: #selector(DefaultRefreshFooter.catchTap(_:)))
+        tap.enabled = needTapToLoadMore
+        self.addGestureRecognizer(tap)
     }
-   public required init?(coder aDecoder: NSCoder) {
+    public required init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
+    func catchTap(tap:UITapGestureRecognizer){
+        let scrollView = self.superview?.superview as? UIScrollView
+        scrollView?.beginFooterRefreshing()
+    }
     // MARK: - Refreshable  -
-   public func distanceToRefresh() -> CGFloat {
+    public func distanceToRefresh() -> CGFloat {
         return PullToRefreshKitConst.defaultFooterHeight
     }
-   public func didBeginRefreshing() {
+    public func didBeginRefreshing() {
         textLabel.text = textDic[.refreshing];
         spinner.startAnimating()
     }
-   public func didEndRefreshing() {
-        textLabel.text = textDic[.pullToRefresh]
+    public func didEndRefreshing() {
+        if needTapToLoadMore{
+            textLabel.text = textDic[.tapToRefresh]
+        }else{
+            textLabel.text = textDic[.pullToRefresh]
+        }
         spinner.stopAnimating()
     }
-   public func didUpdateToNoMoreData(){
+    public func didUpdateToNoMoreData(){
         textLabel.text = textDic[.noMoreData]
     }
-   public func didResetToDefault() {
-        textLabel.text = textDic[.pullToRefresh]
+    public func didResetToDefault() {
+        if needTapToLoadMore{
+            textLabel.text = textDic[.tapToRefresh]
+        }else{
+            textLabel.text = textDic[.pullToRefresh]
+        }
+    }
+    public func shouldBeginRefreshingWhenScroll()->Bool {
+        return !needTapToLoadMore
+    }
+// MARK: - Handle touch -
+    public override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
+        super.touchesBegan(touches, withEvent: event)
+        guard needTapToLoadMore else{
+            return
+        }
+        self.backgroundColor = UIColor.lightGrayColor().colorWithAlphaComponent(0.5)
+    }
+    public override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
+        super.touchesEnded(touches, withEvent: event)
+        guard needTapToLoadMore else{
+            return
+        }
+        self.backgroundColor = UIColor.whiteColor()
+    }
+    public override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
+        super.touchesCancelled(touches, withEvent: event)
+        guard needTapToLoadMore else{
+            return
+        }
+        self.backgroundColor = UIColor.whiteColor()
     }
 }
 class RefreshFooterContainer:UIView{
@@ -107,6 +161,7 @@ class RefreshFooterContainer:UIView{
     required init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
+
 // MARK: - Life circle -
     override func drawRect(rect: CGRect) {
         super.drawRect(rect)
@@ -167,6 +222,10 @@ class RefreshFooterContainer:UIView{
                 guard newOffset?.y > oldOffset?.y else{
                     return
                 }
+                let shouldStart = self.delegate?.shouldBeginRefreshingWhenScroll()
+                guard shouldStart! else{
+                    return
+                }
                 beginRefreshing()
             }
         }
@@ -181,10 +240,18 @@ class RefreshFooterContainer:UIView{
             let contentSize = attachedScrollView.contentSize
             if scrollInset.top + contentSize.height <= CGRectGetHeight(attachedScrollView.frame){
                 if scrollOffset.y >= -1 * scrollInset.top {
+                    let shouldStart = self.delegate?.shouldBeginRefreshingWhenScroll()
+                    guard shouldStart! else{
+                        return
+                    }
                     beginRefreshing()
                 }
             }else{
                 if scrollOffset.y > contentSize.height + scrollInset.bottom - CGRectGetHeight(attachedScrollView.frame) {
+                    let shouldStart = self.delegate?.shouldBeginRefreshingWhenScroll()
+                    guard shouldStart! else{
+                        return
+                    }
                     beginRefreshing()
                 }
             }

Source/Classes/PullToRefresh.swift

@@ -76,6 +76,11 @@ public protocol RefreshableFooter:RefreshAble{
      已经开始执行刷新逻辑，在一次刷新中，只会调用一次
      */
     func didBeginRefreshing()
+    
+    /**
+     当Scroll触发刷新，这个方法返回是否需要刷新
+     */
+    func shouldBeginRefreshingWhenScroll()->Bool
 }
 
 public protocol RefreshableLeftRight:RefreshAble{
@@ -140,6 +145,7 @@ public extension UIScrollView{
         header?.endRefreshing(result)
     }
 }
+
 //Footer
 public extension UIScrollView{
    public func setUpFooterRefresh(action:()->())->DefaultRefreshFooter{
@@ -163,7 +169,7 @@ public extension UIScrollView{
         return footer
     }
    public func beginFooterRefreshing(){
-        let footer = self.viewWithTag(PullToRefreshKitConst.footerTag) as? RefreshHeaderContainer
+        let footer = self.viewWithTag(PullToRefreshKitConst.footerTag) as? RefreshFooterContainer
         footer?.beginRefreshing()
     }
    public func endFooterRefreshing(){