樓主項目中需求有一個輪播圖,由於比擬復雜,就自己寫了個,由於是從網上弄得圖片 所以用了SDWebImage 這個三方庫 當然自己也可以去掉
類型前面有*號 如用運用 請自行加上。。。。。
代碼:.h 文件
@protocol TJXViewDelegate<NSObject> //判別點擊的那個 -(void)sendImageName:(TJXView *)TJXView andName:(NSInteger)selectImage; @end @interface TJXView : UIView @property (nonatomic,weak)id<TJXViewDelegate>delegate; //傳一個frame 和 裝有圖片名字的數組過去 //參數一:frame //參數二:裝有圖片名字的數組 //參數三:BOOL假如是YES,那麼自動滾動,假如是NO不滾動 -(id)initWithFrame:(CGRect)frame andImageNameArray: (NSMutableArray * )imageNameArray andIsRunning:(BOOL)isRunning; @end
.m文件
@interface TJXView()<UIScrollViewDelegate>
{
NSInteger _currentPage; //記載真實的頁碼數
NSTimer *_timer; //生命一個全局變量
}
@property (nonatomic,assign) BOOL isRun;
@property (nonatomic,strong) NSMutableArray *imageArray;//存儲圖片的名字
@property (nonatomic,strong) UIScrollView *scrollView;
@property (nonatomic,strong) UIPageControl *pageControl;
@property (nonatomic,assign) CGFloat width;//view的寬
@property (nonatomic,assign) CGFloat height;//view的高
@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 把數組中的內容放到一個數組中前往
self.imageArray = [NSMutableArray arrayWithArray:imageNameArray];
//在數組的尾部添加原數組第一個元素
[self.imageArray addObject:[imageNameArray firstObject]];
//在數組的首部添加原數組最後一個元素
[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取得以後的點
CGPoint point = _scrollView.contentOffset;
//2求得將要變換的點
CGPoint endPoint = CGPointMake(point.x+_width, 0);
//判別
if (endPoint.x == (self.imageArray.count-1)*_width) {
[UIView animateWithDuration:0.25 animations:^{
_scrollView.contentOffset = CGPointMake(endPoint.x, 0);
} completion:^(BOOL finished) {
//動畫完成的block
_scrollView.contentOffset = CGPointMake(_width, 0);
CGPoint realEnd = _scrollView.contentOffset;
//取一遍頁碼數
_currentPage = realEnd.x/_width;
_pageControl.currentPage = _currentPage-1;
}];
}
else{
//0.25s中更改一個圖片
[UIView animateWithDuration:0.25 animations:^{
_scrollView.contentOffset = endPoint;
} completion:^(BOOL finished) {
}];
CGPoint realEnd = _scrollView.contentOffset;
//取一遍頁碼數
_currentPage = realEnd.x/_width;
_pageControl.currentPage = _currentPage-1;
}
}
//創立頁碼指示器
-(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];
}
//創立滾動視圖
-(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];
}
//程度指示條不顯示
_scrollView.showsHorizontalScrollIndicator = NO;
//封閉彈簧效果
_scrollView.bounces = NO;
//設置用戶看到第一張
_scrollView.contentOffset = CGPointMake(_width, 0);
//設置代理
_scrollView.delegate = self;
//分頁效果
_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(@"沒有設置代理或許沒有事前協議的辦法");
}
}
#pragma mark UIScrollViewDelegate
//中止滾動
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
if (_timer) {
[_timer setFireDate:[NSDate dateWithTimeIntervalSinceNow:2]];
}
//圖片的個數 1 2 3 4 5 6 7 8
//真實的頁碼 0 1 2 3 4 5 6 7
//顯示的頁碼 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);
}
//取一遍頁碼數
CGPoint endPoint = scrollView.contentOffset;
_currentPage = endPoint.x/_width;
_pageControl.currentPage = _currentPage-1;
}
//手指開端觸摸的時分,中止計時器
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
if (_timer) {
//假如有,停掉
[_timer setFireDate:[NSDate distantFuture]];
}
}
在項目中 導入頭文件 恪守代理
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);
}
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