Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
5766 changed files with 423223 additions and 0 deletions
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+//
+//  JHRefreshFooterView.m
+//  JHRefresh
+//
+//  Created by Jiahai on 14-9-16.
+//  Copyright (c) 2014年 Jiahai. All rights reserved.
+//
+
+#import "JHRefreshFooterView.h"
+#import "JHRefreshConfig.h"
+#import "UIView+JHExtension.h"
+#import "UIScrollView+JHExtension.h"
+
+@implementation JHRefreshFooterView
+
+- (id)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+        // Initialization code
+    }
+    return self;
+}
+
+- (void)willMoveToSuperview:(UIView *)newSuperview
+{
+    [super willMoveToSuperview:newSuperview];
+    
+    [self.superview removeObserver:self forKeyPath:JHRefreshContentSize];
+    
+    [newSuperview addObserver:self forKeyPath:JHRefreshContentSize options:NSKeyValueObservingOptionNew context:nil];
+    
+    [self ajustFooterView];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
+{
+    if([keyPath isEqualToString:JHRefreshContentSize])
+    {
+        [self ajustFooterView];
+    }
+    
+    //正在刷新,直接返回
+    if(self.state == JHRefreshStateRefreshing)
+    {
+        return;
+    }
+    if([keyPath isEqualToString:JHRefreshContentOffset])
+    {
+        [self changeStateWithContentOffset];
+        
+        if([self.aniView respondsToSelector:@selector(refreshViewPullingToPosition:)])
+        {
+            NSInteger pos = self.scrollView.contentOffset.y + self.scrollView.jh_height - self.scrollView.jh_contentSizeHeight-self.scrollView.jh_contentInsetBottom;
+            
+            //footerView不可见/全部显示后，直接返回
+            if(pos <= 0 || pos > JHRefreshViewHeight)
+                return;
+            
+            [self.aniView refreshViewPullingToPosition:pos];
+        }
+    }
+}
+
+- (void)changeStateWithContentOffset
+{
+    CGFloat currentOffsetY = self.scrollView.contentOffset.y;
+    CGFloat releaseToRefreshOffsetY = MAX(self.scrollView.jh_contentSizeHeight,self.scrollView.jh_height) - self.scrollView.jh_height + self.scrollView.jh_contentInsetBottom;
+    
+    //footerView的顶端不可见时，直接返回
+    if(currentOffsetY <= releaseToRefreshOffsetY)
+    {
+        return;
+    }
+    
+    releaseToRefreshOffsetY += JHRefreshViewHeight;
+    
+    if(self.scrollView.isDragging)
+    {
+        if(self.state == JHRefreshStateNormal && currentOffsetY>releaseToRefreshOffsetY)
+        {
+            self.state = JHRefreshStatePulling;
+        }
+        else if(self.state == JHRefreshStatePulling && currentOffsetY <= releaseToRefreshOffsetY)
+        {
+            self.state = JHRefreshStateNormal;
+        }
+    }
+    else
+    {
+        if(self.state == JHRefreshStatePulling)
+        {
+            self.state = JHRefreshStateRefreshing;
+        }
+    }
+}
+
+/**
+ *  调整footerView的位置
+ */
+- (void)ajustFooterView
+{
+    CGFloat contentSizeHeight = self.scrollView.jh_contentSizeHeight;
+    CGFloat height = self.scrollView.jh_height;
+    
+    self.jh_originY = MAX(height, contentSizeHeight);
+}
+
+- (void)setRefreshingContentInset
+{
+    self.scrollView.jh_contentInsetBottom += JHRefreshViewHeight;
+}
+
+- (void)resumeContentInset
+{
+    self.scrollView.jh_contentInsetBottom -= JHRefreshViewHeight;
+}
+
+/*
+// Only override drawRect: if you perform custom drawing.
+// An empty implementation adversely affects performance during animation.
+- (void)drawRect:(CGRect)rect
+{
+    // Drawing code
+}
+*/
+
+@end