iOS Implementation of Carousel Graph banner Example

The landlord project needs to have a carousel map, because it is relatively simple, I wrote it myself, because I got pictures from the Internet, so I used SDWebImage, a 3-party library, of course, I can also get rid of it myself

There is a * after the type. If you use it, please add it yourself. . . . .

Code:. h file

@protocol TJXViewDelegate<NSObject>
// Judge the one clicked 
-(void)sendImageName:(TJXView *)TJXView andName:(NSInteger)selectImage;
@end
@interface TJXView : UIView
@property (nonatomic,weak)id<TJXViewDelegate>delegate;
// Biography 1 A frame  And   Array with picture names 
// Parameter 1 : frame
// Parameter 2 Array containing picture names 
// Parameter 3 : BOOL If it is YES Scroll automatically, if it is NO Do not scroll 
-(id)initWithFrame:(CGRect)frame andImageNameArray:
(NSMutableArray * )imageNameArray andIsRunning:(BOOL)isRunning;
@end

. m file

@interface TJXView()<UIScrollViewDelegate>
{
  NSInteger _currentPage; // Record the true number of pages 
  NSTimer *_timer; // Life 1 Global variables 
}
@property (nonatomic,assign) BOOL isRun;
@property (nonatomic,strong) NSMutableArray *imageArray;// Store the name of the picture 
@property (nonatomic,strong) UIScrollView *scrollView;
@property (nonatomic,strong) UIPageControl *pageControl;
@property (nonatomic,assign) CGFloat width;//view Width of 
@property (nonatomic,assign) CGFloat height;//view The height of 
@end

-(id)initWithFrame:(CGRect)frame andImageNameArray:(NSMutableArray *)imageNameArray andIsRunning:(BOOL)isRunning{
  self = [super initWithFrame:frame];
  if (self) {
    _width = self.frame.size.width;
    _height = self.frame.size.height;
    //arrayWithArray  Put the contents of the array into the 1 Returns from an array of 
    self.imageArray = [NSMutableArray arrayWithArray:imageNameArray];
    // At the end of the array, add the number of the original array 1 Elements 
    [self.imageArray addObject:[imageNameArray firstObject]];
    // Add the end of the original array at the beginning of the array 1 Elements 
    [self.imageArray insertObject:[imageNameArray lastObject] atIndex:0];
    self.isRun = isRunning;
    _currentPage = 0;
    [self createSro];
    [self createPageControl];
    [self createTimer];
  }
  return self;
}
-(void)createTimer{
  if (_isRun == YES) {
    _timer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(change) userInfo:nil repeats:YES ];
    [[NSRunLoop currentRunLoop]addTimer:_timer forMode:NSRunLoopCommonModes];  }
}
-(void)change{
  //1 Get the current point 
  CGPoint point = _scrollView.contentOffset;
  //2 Find the point to be transformed 
  CGPoint endPoint = CGPointMake(point.x+_width, 0);
  // Judge 
  if (endPoint.x == (self.imageArray.count-1)*_width) {
    [UIView animateWithDuration:0.25 animations:^{
      _scrollView.contentOffset = CGPointMake(endPoint.x, 0);
    } completion:^(BOOL finished) {
      // Animated completed block
      _scrollView.contentOffset = CGPointMake(_width, 0);
      CGPoint realEnd = _scrollView.contentOffset;
      // Take 1 Number of page passes 
      _currentPage = realEnd.x/_width;
      _pageControl.currentPage = _currentPage-1;
    }];
  }
  else{
    //0.25s Change in 1 Pictures 
    [UIView animateWithDuration:0.25 animations:^{
      _scrollView.contentOffset = endPoint;
    } completion:^(BOOL finished) {
    }];
        CGPoint realEnd = _scrollView.contentOffset;
    // Take 1 Number of page passes 
    _currentPage = realEnd.x/_width;
    _pageControl.currentPage = _currentPage-1;
  }  
}
// Create a page number indicator 
-(void)createPageControl{
  _pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(_width-200, _height-30, 100, 30)];
  _pageControl.centerX = _width/2;
  _pageControl.numberOfPages = self.imageArray.count-2;
  _pageControl.pageIndicatorTintColor = WP_GRAY_COLOR;
  _pageControl.currentPageIndicatorTintColor = [UIColor whiteColor];
  _pageControl.userInteractionEnabled = NO;
  [self addSubview:_pageControl];
}
// Create a scrolling view 
-(void)createSro{
  _scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, _width, _height)];
  _scrollView.contentSize = CGSizeMake(_width*self.imageArray.count, _height);
  for (int i = 0; i < self.imageArray.count; i++) {
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(i*_width, 0, _width, _height)];
//    imageView.image = [UIImage imageNamed:self.imageArray[i]];
    [imageView sd_setImageWithURL:self.imageArray[i] placeholderImage:[UIImage imageNamed:@"home_banner_blank"]];
    imageView.userInteractionEnabled = YES;
    imageView.tag = 200+i;
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    [imageView addGestureRecognizer:tap];
    [_scrollView addSubview:imageView];
  }
  // Horizontal indicator bar is not displayed 
  _scrollView.showsHorizontalScrollIndicator = NO;
  // Close spring effect 
  _scrollView.bounces = NO;
  // Set the user to see the 1 Zhang 
  _scrollView.contentOffset = CGPointMake(_width, 0);
  // Set up proxy 
  _scrollView.delegate = self;
  // Paging effect 
  _scrollView.pagingEnabled = YES;
  [self addSubview:_scrollView];
}
-(void)tap:(UITapGestureRecognizer *)tap{
  if(_delegate&&[_delegate respondsToSelector:@selector(sendImageName:andName:)]){
    [_delegate sendImageName:self andName:tap.view.tag-201];
  }else{
    NSLog(@" Method without proxy or prior agreement ");
  } 
}
#pragma mark UIScrollViewDelegate
// Stop scrolling 
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
  if (_timer) {
    [_timer setFireDate:[NSDate dateWithTimeIntervalSinceNow:2]];
  }
  // Number of pictures  1 2 3 4 5 6 7 8
  // Real page number  0 1 2 3 4 5 6 7
  // Page number displayed   0 1 2 3 4 5
  CGPoint point = _scrollView.contentOffset;
  if (point.x == (self.imageArray.count-1)*_width) {
    scrollView.contentOffset = CGPointMake(_width, 0);
  }
  if (point.x == 0) {
    scrollView.contentOffset = CGPointMake((self.imageArray.count-2)*_width, 0);
  }
  // Take 1 Number of page passes 
  CGPoint endPoint = scrollView.contentOffset;
  _currentPage = endPoint.x/_width;
  _pageControl.currentPage = _currentPage-1;
}
// Stop the timer when the finger starts touching 
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
  if (_timer) {
    // If there is, stop it 
    [_timer setFireDate:[NSDate distantFuture]];
  }
}

Import the header compliance agent in the project

    TJXView * TJXView = [[TJXView alloc]initWithFrame:CGRectMake(0, 0, WPSCREEN_WIDTH, 100*WPSCREEN_HIGTH_RATIO) andImageNameArray:self.bannerImager andIsRunning:YES];
    TJXView.delegate = self;
    [self.view addSubview: TJXView];
#pragma mark TJXViewDelegate
-(void)sendImageName:(TJXView *) TJXView andName:(NSInteger)selectImage{
   KKLog(@"%ld",(long)selectImage);
}