Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
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+//
+//  LXAdScrollView.m
+//  LXAdScrollview
+//
+//  Created by imac on 16/11/8.
+//  Copyright © 2016年 xiang. All rights reserved.
+//
+
+#import "LXAdScrollView.h"
+#import "NSTimer+Addition.h"
+#import "UIImageView+WebCache.h"
+
+@interface LXAdScrollView ()<UIScrollViewDelegate>
+
+@property (nonatomic, strong) NSTimer *timer;
+@property (nonatomic) CGRect rect;
+@end
+
+@implementation LXAdScrollView
+
+-(instancetype)initWithFrame:(CGRect)frame
+{
+    if (self = [super initWithFrame:frame]) {
+        _rect = self.bounds;
+        [self creatSubviews];
+    }
+    return self;
+}
+
+-(void)awakeFromNib{
+    [super awakeFromNib];
+    _rect = CGRectMake(0,0,kScreenSize.width,CGRectGetHeight(self.frame));
+    [self creatSubviews];
+}
+
+-(void)creatSubviews{
+    _animationDuration = 3.0f;
+    _leftImageView = [[UIImageView alloc]init];
+    [self.scrollView addSubview:_leftImageView];
+    
+    _currentImageView = [[UIImageView alloc]init];
+    
+    [self.scrollView addSubview:_currentImageView];
+    
+    _rightImageView = [[UIImageView alloc]init];
+    
+    [self.scrollView addSubview:_rightImageView];
+    _timer = [NSTimer scheduledTimerWithTimeInterval:_animationDuration target:self selector:@selector(onTimer:) userInfo:nil repeats:YES];
+    [_timer pauseTimer];
+    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(onGesture:)];
+    [self.scrollView addGestureRecognizer:tapGesture];
+    self.translatesAutoresizingMaskIntoConstraints = NO;
+    
+}
+
+-(void)layoutSubviews
+{
+    [super layoutSubviews];
+    //xib 时 self。frame 改变
+    _scrollView.frame = self.bounds;
+    _leftImageView.frame = CGRectMake(0,0,CGRectGetWidth(self.frame), CGRectGetHeight(self.frame));
+        
+    _currentImageView.frame = CGRectOffset(_leftImageView.frame, CGRectGetWidth(_leftImageView.frame), 0);
+        
+    _rightImageView.frame = CGRectOffset(_currentImageView.frame, CGRectGetWidth(_currentImageView.frame), 0);
+    _pageControl.frame = CGRectMake(40, CGRectGetHeight(self.frame)-20, CGRectGetWidth(self.frame)-40*2, 10);
+}
+
+#pragma mark - Action
+
+-(void)onTimer:(NSTimer*)timer
+{
+    [self.scrollView setContentOffset:CGPointMake(CGRectGetWidth(_rect)*2, 0) animated:YES];
+}
+
+-(void)onGesture:(UITapGestureRecognizer*)tapGesture
+{
+    if (self.tapActionBlock) {
+        self.tapActionBlock(self);
+    }
+}
+
+#pragma mark - setter
+
+-(void)setAdList:(NSArray *)adList
+{
+    _adList = adList;
+    self.pageControl.numberOfPages = _adList.count;
+    self.pageControl.currentPage = 0;
+    _currentPage = 0;
+    
+    if (_adList.count <= 1) {
+        _scrollView.scrollEnabled = NO;
+        _scrollView.contentSize = CGSizeMake(CGRectGetWidth(_rect)*3, 0);
+        //self.scrollView.contentSize = CGSizeMake(CGRectGetWidth(_rect), 0);
+    }else{
+         _scrollView.scrollEnabled = YES;
+        _scrollView.contentSize = CGSizeMake(CGRectGetWidth(_rect)*3, 0);
+        [_timer resumeTimerAfterTimeInterval:_animationDuration];
+    }
+   [self refreshImageView];
+}
+
+//根据当前的index，重置当前显示的图片，并且使currentImageView永远保持在中间
+-(void)refreshImageView
+{
+    
+    NSInteger index = _currentPage;
+    [self formatImageView:_currentImageView imageData:self.adList[index]];
+    
+    if (self.adList.count > 1) {
+        index = _currentPage-1<0?self.adList.count-1:_currentPage-1;
+        [self formatImageView:_leftImageView imageData:self.adList[index]];
+        
+        index = _currentPage+1>=self.adList.count?0:_currentPage+1;
+        [self formatImageView:_rightImageView imageData:self.adList[index]];
+    }
+    
+    self.scrollView.contentOffset = CGPointMake(CGRectGetWidth(_rect), 0);
+}
+
+
+-(void)formatImageView:(UIImageView*)imageView imageData:(id)data
+{
+    if ([data isKindOfClass:[UIImage class]]) {
+        imageView.image = (UIImage*)data;
+    }else if ([data isKindOfClass:[NSString class]]) {
+        NSString *imageName = (NSString*)data;
+        if ([imageName hasPrefix:@"http"]) {
+            //网络图片live_upload_banner
+            [imageView sd_setImageWithURL:[NSURL URLWithString:imageName] placeholderImage:[UIImage imageNamed:@"live_upload_banner.png"]];
+        }else{
+            //本地图片
+            dispatch_async(dispatch_get_main_queue(), ^{
+               
+                imageView.image = [UIImage imageNamed:imageName];
+            });
+        
+        }
+    }
+}
+
+-(void)refreshCurrentPage
+{
+    if (self.scrollView.contentOffset.x >= CGRectGetWidth(_rect)*1.5) {
+        
+        _currentPage ++;
+        
+        if (_currentPage > self.adList.count-1) {
+            _currentPage = 0;
+        }
+    }else if (self.scrollView.contentOffset.x <= CGRectGetWidth(_rect)/2) {
+        _currentPage--;
+        
+        if (_currentPage < 0) {
+            _currentPage = self.adList.count-1;
+        }
+    }
+}
+
+#pragma mark - UI
+-(UIPageControl*)pageControl
+{
+    if (!_pageControl) {
+        CGRect rect = CGRectMake(40, CGRectGetHeight(_rect)-20, CGRectGetWidth(_rect)-40*2, 10);
+        _pageControl = [[UIPageControl alloc]initWithFrame:rect];
+        _pageControl.hidesForSinglePage = YES;
+        _pageControl.pageIndicatorTintColor = [UIColor grayColor];
+        _pageControl.currentPageIndicatorTintColor = RGB(0, 184, 238);
+        [self addSubview:_pageControl];
+    }
+    return _pageControl;
+}
+
+-(UIScrollView*)scrollView
+{
+    if (!_scrollView) {
+        _scrollView = [[UIScrollView alloc]initWithFrame:_rect];
+        _scrollView.delegate = self;
+        _scrollView.bounces = NO;
+        _scrollView.showsHorizontalScrollIndicator = NO;
+        _scrollView.showsVerticalScrollIndicator = NO;
+        _scrollView.pagingEnabled = YES;
+        _scrollView.scrollsToTop = NO;
+        _scrollView.contentSize = CGSizeMake(CGRectGetWidth(_rect)*3, 0);
+        //_scrollView.backgroundColor = [UIColor redColor];
+        [self addSubview:_scrollView];
+    }
+    return _scrollView;
+}
+
+#pragma mark - UIScrollViewDelegate
+- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
+{
+    //开始滚动时暂停定时器
+    [self.timer pauseTimer];
+}
+- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
+{
+    [self refreshCurrentPage];
+    
+    if (self.pageControl.currentPage != _currentPage) {
+        self.pageControl.currentPage = _currentPage;
+        [self refreshImageView];
+    }
+    //滚动结束回复定时器
+    [self.timer resumeTimerAfterTimeInterval:_animationDuration];
+}
+
+- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
+{
+    [self refreshCurrentPage];
+    
+    if (self.pageControl.currentPage != _currentPage) {
+        self.pageControl.currentPage = _currentPage;
+        [self refreshImageView];
+    }
+}
+
+-(void)dealloc{
+    
+    [_timer invalidate];
+    _timer = nil;
+}
+
+@end