1

keyBoard/Class/AiTalk/V/Chat/KBChatTableView.m

@@ -37,6 +37,11 @@ static const NSTimeInterval kTimestampInterval = 5 * 60; // 5 分钟
 @property (nonatomic, assign) CGSize lastIntroFooterTableSize;
 @property (nonatomic, assign) BOOL applyingIntroFooter;
 @property (nonatomic, copy) NSString *remoteAudioToken;
+@property (nonatomic, strong) UIView *topStatusView;
+@property (nonatomic, strong) UIActivityIndicatorView *topLoadingIndicator;
+@property (nonatomic, strong) UILabel *topStatusLabel;
+@property (nonatomic, assign) BOOL isTopLoading;
+@property (nonatomic, assign) BOOL isTopNoMore;
 
 @end
 
@@ -427,6 +432,89 @@ static inline CGFloat KBChatAbsTimeInterval(NSTimeInterval interval) {
     }
 }
 
+#pragma mark - Top Status
+
+- (void)showTopLoading {
+    self.isTopLoading = YES;
+    self.isTopNoMore = NO;
+    [self updateTopStatusView];
+}
+
+- (void)hideTopLoading {
+    self.isTopLoading = NO;
+    [self updateTopStatusView];
+}
+
+- (void)showNoMoreData {
+    self.isTopNoMore = YES;
+    self.isTopLoading = NO;
+    [self updateTopStatusView];
+}
+
+- (void)hideNoMoreData {
+    self.isTopNoMore = NO;
+    [self updateTopStatusView];
+}
+
+- (void)updateTopStatusView {
+    BOOL shouldShow = self.isTopLoading || self.isTopNoMore;
+    if (!shouldShow) {
+        self.topStatusView.hidden = YES;
+        return;
+    }
+    
+    if (!self.topStatusView) {
+        self.topStatusView = [[UIView alloc] initWithFrame:CGRectZero];
+        self.topStatusView.backgroundColor = [UIColor clearColor];
+        self.topStatusView.userInteractionEnabled = NO;
+        
+        self.topLoadingIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleMedium];
+        self.topLoadingIndicator.hidesWhenStopped = YES;
+        [self.topStatusView addSubview:self.topLoadingIndicator];
+        
+        self.topStatusLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+        self.topStatusLabel.font = [UIFont systemFontOfSize:12];
+        self.topStatusLabel.textColor = [[UIColor whiteColor] colorWithAlphaComponent:0.8];
+        [self.topStatusView addSubview:self.topStatusLabel];
+        
+        [self addSubview:self.topStatusView];
+    }
+    
+    if (self.isTopLoading) {
+        self.topStatusLabel.text = KBLocalized(@"Loading...");
+        [self.topLoadingIndicator startAnimating];
+    } else if (self.isTopNoMore) {
+        self.topStatusLabel.text = KBLocalized(@"No more data");
+        [self.topLoadingIndicator stopAnimating];
+    }
+    
+    CGFloat width = CGRectGetWidth(self.tableView.bounds);
+    if (width <= 0) {
+        width = CGRectGetWidth(self.bounds);
+    }
+    CGFloat height = 32;
+    self.topStatusView.frame = CGRectMake(0, 0, width, height);
+    self.topStatusView.hidden = NO;
+    [self bringSubviewToFront:self.topStatusView];
+    
+    CGSize labelSize = [self.topStatusLabel sizeThatFits:CGSizeMake(width - 40, height)];
+    CGFloat totalWidth = labelSize.width + (self.isTopLoading ? 20 + 6 : 0);
+    CGFloat startX = (width - totalWidth) / 2.0;
+    if (self.isTopLoading) {
+        self.topLoadingIndicator.frame = CGRectMake(startX, (height - 20) / 2.0, 20, 20);
+        self.topStatusLabel.frame = CGRectMake(CGRectGetMaxX(self.topLoadingIndicator.frame) + 6,
+                                               (height - labelSize.height) / 2.0,
+                                               labelSize.width,
+                                               labelSize.height);
+    } else {
+        self.topStatusLabel.frame = CGRectMake((width - labelSize.width) / 2.0,
+                                               (height - labelSize.height) / 2.0,
+                                               labelSize.width,
+                                               labelSize.height);
+    }
+    
+}
+
 - (void)scrollToBottom {
     [self scrollToBottomAnimated:YES];
 }