feature:

1.添加pageWillShow回调
2.添加pageShow回调
3.支持外部修改frame，同时调整子view frame
3.优化代码逻辑

DZXCarouselView.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'DZXCarouselView'
-  s.version          = '0.0.1'
+  s.version          = '0.0.2'
   s.summary          = '轮播组件'
 
 # This description is used to generate tags and improve search results.

DZXCarouselView/Classes/DZXCarouselView.h

@@ -55,6 +55,8 @@ typedef NS_ENUM(NSUInteger, DZXCarouselPageControlTheme) {
 @class DZXCarouselConfig;
 typedef void(^DZXCarouselConfigBlock)(DZXCarouselConfig *carouselConfig);
 typedef void(^DZXCarouselTapBlock)(NSInteger index, id data);
+typedef void(^DZXCarouselPageShowBlock)(NSInteger index, id data);
+typedef void(^DZXCarouselPageWillShowBlock)(NSInteger index, id data);
 
 @interface DZXCarouselConfig : NSObject
 
@@ -101,7 +103,13 @@ typedef void(^DZXCarouselTapBlock)(NSInteger index, id data);
 /// @param frame frame
 /// @param configBlock 配置回调
 /// @param tapBlock 点击回调
-- (instancetype)initWithFrame:(CGRect)frame configBlock:(DZXCarouselConfigBlock)configBlock tapBlock:(DZXCarouselTapBlock)tapBlock;
+/// @param pageShowBlock 页面将展示回调
+/// @param pageShowBlock 页面展示回调
+- (instancetype)initWithFrame:(CGRect)frame
+                  configBlock:(DZXCarouselConfigBlock)configBlock
+                     tapBlock:(DZXCarouselTapBlock)tapBlock
+            pageWillShowBlock:(DZXCarouselPageWillShowBlock)pageWillShowBlock
+                pageShowBlock:(DZXCarouselPageShowBlock)pageShowBlock;
 
 /// 开始定时器
 - (void)timerStart;
@@ -109,5 +117,8 @@ typedef void(^DZXCarouselTapBlock)(NSInteger index, id data);
 /// 结束定时器
 - (void)timerStop;
 
+/// 更新当前索引
+- (void)updateCurrentIndex:(NSInteger)currentIndex;
+
 @end
 

DZXCarouselView/Classes/DZXCarouselView.m

@@ -75,12 +75,18 @@
 
 @property (nonatomic, copy) DZXCarouselConfigBlock configBlock;
 @property (nonatomic, copy) DZXCarouselTapBlock tapBlock;
+@property(nonatomic, copy) DZXCarouselPageWillShowBlock pageWillShowBlock;
+@property (nonatomic, copy) DZXCarouselPageShowBlock pageShowBlock;
 
 @end
 @implementation DZXCarouselView
 
 #pragma mark - Initial Methods
-- (instancetype)initWithFrame:(CGRect)frame configBlock:(DZXCarouselConfigBlock)configBlock tapBlock:(DZXCarouselTapBlock)tapBlock {
+- (instancetype)initWithFrame:(CGRect)frame
+                  configBlock:(DZXCarouselConfigBlock)configBlock
+                     tapBlock:(DZXCarouselTapBlock)tapBlock
+            pageWillShowBlock:(DZXCarouselPageWillShowBlock)pageWillShowBlock
+                pageShowBlock:(DZXCarouselPageShowBlock)pageShowBlock{
     if (self = [super initWithFrame:frame]) {
         
         DZXCarouselConfig *carouselConfig = DZXCarouselConfig.new;
@@ -88,9 +94,10 @@
         if (configBlock) {
             configBlock(carouselConfig);
         }
-        if (tapBlock) {
         self.tapBlock = tapBlock;
-        }
+        self.pageWillShowBlock = pageWillShowBlock;
+        self.pageShowBlock = pageShowBlock;
+        
         NSAssert(![carouselConfig.subViewClass isEqualToString:@""], @"carouselConfig.subViewClass should not be nil");
         NSAssert(![carouselConfig.propertyName isEqualToString:@""], @"carouselConfig.propertyName should not be nil");
         if (_carouselConfig.showPageControl) {
@@ -107,22 +114,29 @@
         _scrollView.showsHorizontalScrollIndicator = NO;
         _scrollView.backgroundColor = UIColor.clearColor;
         [self addSubview:_scrollView];
-        if (carouselConfig.theme == DZXCarouselThemeVertical) {
-            _scrollView.contentOffset = CGPointMake(0, frame.size.height);
-            _scrollView.contentSize = CGSizeMake(frame.size.width, frame.size.height*3);
-        }else{
-            _scrollView.contentOffset = CGPointMake(frame.size.width, 0);
-            _scrollView.contentSize = CGSizeMake(frame.size.width*3, frame.size.height);
-        }
     }
     return self;
 }
+
 - (void)willMoveToSuperview:(UIView *)newSuperview {
     [super willMoveToSuperview:newSuperview];
     if (!newSuperview) {
         [self timerStop];
     }
 }
+
+- (void)layoutSubviews {
+    self.scrollView.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
+    [self updateSubViewFrames];
+    
+    if (_carouselConfig.theme == DZXCarouselThemeVertical) {
+        _scrollView.contentOffset = CGPointMake(0, self.frame.size.height);
+        _scrollView.contentSize = CGSizeMake(self.frame.size.width, self.frame.size.height*3);
+    }else{
+        _scrollView.contentOffset = CGPointMake(self.frame.size.width, 0);
+        _scrollView.contentSize = CGSizeMake(self.frame.size.width*3, self.frame.size.height);
+    }
+}
 #pragma mark - Public Methods
 - (void)timerStop {
     if (_timer) {
@@ -130,13 +144,29 @@
         self.timer = nil;
     }
 }
+
 - (void)timerStart {
-    if (_dataArr.count > 1) {
+    if (_carouselConfig.autoScroll && _dataArr.count > 1) {
         [self timerStop];
         self.timer = [NSTimer scheduledTimerWithTimeInterval:_carouselConfig.timeInterval target:self selector:@selector(timerAction:) userInfo:nil repeats:YES];
         [[NSRunLoop mainRunLoop] addTimer:_timer forMode:NSDefaultRunLoopMode];
     }
 }
+
+- (void)updateCurrentIndex:(NSInteger)currentIndex {
+    if (currentIndex >= _dataArr.count || currentIndex < 0) {
+        return;
+    }
+    [self timerStop];
+    
+    if (_pageWillShowBlock) {
+        _pageWillShowBlock(currentIndex,_dataArr[currentIndex]);
+    }
+    
+    self.currentIndex = currentIndex;
+    [self updateViewData];
+    [self timerStart];
+}
 #pragma mark - Override Methods
 
 #pragma mark - Privater Methods
@@ -144,16 +174,18 @@
     if (_lastV) return;
     
     Class className = NSClassFromString(_carouselConfig.subViewClass);
-    self.lastV = [[className alloc] initWithFrame:CGRectMake(_carouselConfig.padding.left, _carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom)];
-    [_scrollView addSubview:_lastV];
+    self.lastV = [[className alloc] init];
     
     if (_carouselConfig.theme == DZXCarouselThemeVertical) {
-        self.currentV = [[className alloc] initWithFrame:CGRectMake(_carouselConfig.padding.left, self.frame.size.height+_carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom)];
-        self.nextV = [[className alloc] initWithFrame:CGRectMake(_carouselConfig.padding.left, self.frame.size.height*2+_carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom)];
+        self.currentV = [[className alloc] init];
+        self.nextV = [[className alloc] init];
     }else{
-        self.currentV = [[className alloc] initWithFrame:CGRectMake(self.frame.size.width+_carouselConfig.padding.left, _carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom)];
-        self.nextV = [[className alloc] initWithFrame:CGRectMake(self.frame.size.width*2+_carouselConfig.padding.left, _carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom)];
+        self.currentV = [[className alloc] init];
+        self.nextV = [[className alloc] init];
     }
+    [self updateSubViewFrames];
+    
+    [_scrollView addSubview:_lastV];
     [_scrollView addSubview:_currentV];
     
     UITapGestureRecognizer *tapGes = [UITapGestureRecognizer.alloc initWithTarget:self action:@selector(tapCurrentView)];
@@ -195,9 +227,14 @@
     }
 }
 
-- (void)tapCurrentView {
-    if (self.tapBlock) {
-        self.tapBlock(self.currentIndex, self.dataArr[self.currentIndex]);
+- (void)updateSubViewFrames {
+    _lastV.frame = CGRectMake(_carouselConfig.padding.left, _carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom);
+    if (_carouselConfig.theme == DZXCarouselThemeVertical) {
+        _currentV.frame = CGRectMake(_carouselConfig.padding.left, self.frame.size.height+_carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom);
+        _nextV.frame = CGRectMake(_carouselConfig.padding.left, self.frame.size.height*2+_carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom);
+    }else{
+        _currentV.frame = CGRectMake(self.frame.size.width+_carouselConfig.padding.left, _carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom);
+        _nextV.frame = CGRectMake(self.frame.size.width*2+_carouselConfig.padding.left, _carouselConfig.padding.top,self.frame.size.width-_carouselConfig.padding.left-_carouselConfig.padding.right, self.frame.size.height-_carouselConfig.padding.top-_carouselConfig.padding.bottom);
     }
 }
 
@@ -210,18 +247,24 @@
         }
         _isLast = NO;//重新置回NO，向后滚
         
+        [self updateViewData];
+    }
+}
+//更新内容
+- (void)updateViewData {
     [self addProperty:_dataArr[(_currentIndex-1)%_dataArr.count] toObj:_lastV];
     [self addProperty:_dataArr[_currentIndex] toObj:_currentV];
     [self addProperty:_dataArr[(_currentIndex+1)%_dataArr.count] toObj:_nextV];
+    
     if (_carouselConfig.theme == DZXCarouselThemeVertical) {
         [_scrollView setContentOffset:CGPointMake(0, self.frame.size.height)];
     }else{
         [_scrollView setContentOffset:CGPointMake(self.frame.size.width, 0)];
     }
     _pageControl.currentPage = _currentIndex;
-    }
-}
     
+    [self pageShow];
+}
 - (void)addProperty:(id)data toObj:(id)obj {
     SEL sel=NSSelectorFromString(_carouselConfig.propertyName);
     if ([obj respondsToSelector:sel]) {
@@ -266,6 +309,8 @@
 
 #pragma mark - Target Methods
 -(void)timerAction:(BOOL)isLast {
+    [self pageWillShow:isLast];
+    
     __weak __typeof(self)weakSelf = self;
     dispatch_async(dispatch_get_main_queue(), ^{
         __strong __typeof(weakSelf)strongSelf = weakSelf;
@@ -286,6 +331,32 @@
     //动画过后重置位置
     [NSTimer scheduledTimerWithTimeInterval:.3 target:self selector:@selector(scroll) userInfo:nil repeats:NO];
 }
+
+#pragma mark - Action
+//将要显示
+- (void)pageWillShow:(BOOL)isLast {
+    NSInteger willShowIndex;
+    if (_isLast) {
+        willShowIndex = (_currentIndex - 1)%_dataArr.count;
+    }else{
+        willShowIndex = (_currentIndex + 1)%_dataArr.count;
+    }
+    if (_pageWillShowBlock) {
+        _pageWillShowBlock(willShowIndex,_dataArr[willShowIndex]);
+    }
+}
+//已显示
+- (void)pageShow {
+    if (_pageShowBlock) {
+        _pageShowBlock(_currentIndex,_dataArr[_currentIndex]);
+    }
+}
+///点击
+- (void)tapCurrentView {
+    if (self.tapBlock) {
+        self.tapBlock(_currentIndex, self.dataArr[_currentIndex]);
+    }
+}
 #pragma mark - Setter Getter Methods
 -(void)setDataArr:(NSArray *)dataArr {
     _dataArr=dataArr;
@@ -311,12 +382,15 @@
     [self addProperty:_dataArr[0] toObj:_currentV];
     if (dataArr.count>1) {
         [self addProperty:_dataArr[1] toObj:_nextV];
-        if (_carouselConfig.autoScroll) {
+        
         [self timerStart];
-        }
     }else{
         [self addProperty:_dataArr[0] toObj:_nextV];
     }
+    
+    //页面展示block（第一次进来）
+    _pageWillShowBlock(0, _dataArr[0]);
+    _pageShowBlock(0, _dataArr[0]);
 }
 
 @end