iOS实现带有缩放效果的自动轮播图

概述iOS实现带有缩放效果的自动轮播图 本文实例为大家分享了iOS带有缩放效果的自动轮播图,供大家参考,具体内容如下 可直接设置frame然后加载到视图上使用. 效果就是这样的,图片切换的过程中还是有卡顿,不够流畅,后续更新. 直接上代码. .h文件包含: #import <UIKit/UIKit.h> @interface CustomScrollView : UIView @property (strong,nonatomic) NSArray *imageArr; @end .m文件包含: #import &quot ...

本文实例为大家分享了iOS带有缩放效果的自动轮播图，供大家参考，具体内容如下

可直接设置frame然后加载到视图上使用。

效果就是这样的，图片切换的过程中还是有卡顿，不够流畅，后续更新。

直接上代码。

.h文件包含：

#import <UIKit/UIKit.h> @interface CustomScrollVIEw : UIVIEw@property (strong,nonatomic) NSArray *imageArr; @end

.m文件包含:

#import "CustomScrollVIEw.h" @interface CustomScrollVIEw ()<uiscrollviewdelegate> @property (strong,nonatomic) UIScrollVIEw *scrollVIEw;@property (strong,nonatomic) UIImageVIEw *backImageVIEw; @property (strong,nonatomic) UIImageVIEw *leftIamgeVIEw;@property (strong,nonatomic) UIImageVIEw *mIDdleImageVIEw;@property (strong,nonatomic) UIImageVIEw *rightimageVIEw; @property (strong,nonatomic) UIPageControl *pageControl; //高度@property (assign,nonatomic) CGfloat scrollVIEwHeight; //手动造成的偏移量@property (assign,nonatomic) CGfloat offsetX; @property (strong,nonatomic) NSTimer *timer; //属于计时器方法动画持续时间 ？@property (assign,nonatomic) BOol timerAnimation; @end //左右内容的最大偏移量#define OFFSET_MAX   ([UIScreen mainScreen].bounds.size.wIDth-64)*0.9 @implementation CustomScrollVIEw - (instancetype)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) {   self.scrollVIEwHeight = frame.size.height;   [self addSubvIEw:self.backImageVIEw];  [self addSubvIEw:self.scrollVIEw];  [self addSubvIEw:self.pageControl];   [self.backImageVIEw mas_makeConstraints:^(MASConstraintMaker *make) {   make.edges.with.mas_equalTo(self);  }];  [self.scrollVIEw mas_makeConstraints:^(MASConstraintMaker *make) {   make.edges.with.mas_equalTo(self);  }];  [self.pageControl mas_makeConstraints:^(MASConstraintMaker *make) {   make.left.right.bottom.mas_equalTo(self);   make.height.mas_equalTo(@20);  }];   self.timer = [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(timerAction) userInfo:nil repeats:YES];  [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSDefaultRunLoopMode];  [self.timer setFireDate:[NSDate dateWithTimeIntervalSinceNow:5]]; } return self;} - (NSArray *)imageArr { if (!_imageArr) {  _imageArr = @[@"timg-0",@"timg-1",@"timg-2"]; } return _imageArr;} - (UIImageVIEw *)backImageVIEw { if (!_backImageVIEw) {  _backImageVIEw = [[UIImageVIEw alloc] init];  _backImageVIEw.image = [UIImage imagenamed:@"bg_home"]; } return _backImageVIEw;} - (UIScrollVIEw *)scrollVIEw { if (!_scrollVIEw) {  _scrollVIEw = [[UIScrollVIEw alloc] init];  _scrollVIEw.showsverticalScrollindicator = NO;  _scrollVIEw.showsHorizontalScrollindicator = NO;  _scrollVIEw.contentSize = CGSizeMake(kScreenWIDth+2*OFFSET_MAX,self.scrollVIEwHeight);  [_scrollVIEw setContentOffset:CGPointMake(OFFSET_MAX,0)];  _scrollVIEw.bounces = NO;  _scrollVIEw.delegate = self;   _leftIamgeVIEw = [[UIImageVIEw alloc] init];  _leftIamgeVIEw.image = [UIImage imagenamed:self.imageArr[0]];  _leftIamgeVIEw.layer.cornerRadius = 5;  _leftIamgeVIEw.layer.masksToBounds = YES;   _mIDdleImageVIEw = [[UIImageVIEw alloc] init];  _mIDdleImageVIEw.image = [UIImage imagenamed:self.imageArr[1]];  _mIDdleImageVIEw.layer.cornerRadius = 5;  _mIDdleImageVIEw.layer.masksToBounds = YES;   _rightimageVIEw = [[UIImageVIEw alloc] init];  _rightimageVIEw.image = [UIImage imagenamed:self.imageArr[2]];  _rightimageVIEw.layer.cornerRadius = 5;  _rightimageVIEw.layer.masksToBounds = YES;   [_scrollVIEw addSubvIEw:_leftIamgeVIEw];  [_scrollVIEw addSubvIEw:_mIDdleImageVIEw];  [_scrollVIEw addSubvIEw:_rightimageVIEw];  [_leftIamgeVIEw mas_makeConstraints:^(MASConstraintMaker *make) {   make.size.mas_equalTo(CGSizeMake((kScreenWIDth-64)*0.9,self.scrollVIEwHeight*0.9));   make.centerY.mas_equalTo(_scrollVIEw);   make.right.mas_equalTo(_mIDdleImageVIEw.mas_left).offset(-20);  }];  [_mIDdleImageVIEw mas_makeConstraints:^(MASConstraintMaker *make) {   make.size.mas_equalTo(CGSizeMake(kScreenWIDth-64,self.scrollVIEwHeight));   make.centerY.mas_equalTo(_scrollVIEw);   make.left.mas_equalTo(_scrollVIEw).offset(OFFSET_MAX+64/2);  }];  [_rightimageVIEw mas_makeConstraints:^(MASConstraintMaker *make) {   make.size.mas_equalTo(_leftIamgeVIEw);   make.centerY.mas_equalTo(_scrollVIEw);   make.left.mas_equalTo(_mIDdleImageVIEw.mas_right).offset(20);  }]; } return _scrollVIEw;} - (UIPageControl *)pageControl { if (!_pageControl) {  _pageControl = [[UIPageControl alloc] init];  _pageControl.numberOfPages = self.imageArr.count;  _pageControl.enabled = NO;  _pageControl.currentPage = 0;  _pageControl.hIDesForSinglePage = YES;  _pageControl.pageIndicatorTintcolor = [UIcolor whitecolor];  _pageControl.currentPageIndicatorTintcolor = MAINcolor; } return _pageControl;} #pragma mark ------------ uiscrollviewdelegate -------- - (voID)scrollVIEwDIDScroll:(UIScrollVIEw *)scrollVIEw { if (self.timerAnimation) {  return; } CGfloat offScale = scrollVIEw.contentOffset.x - OFFSET_MAX; if (offScale < 0) {  //右滑  self.leftIamgeVIEw.layer.transformScale = 1 + 1.0/9*(fabs(offScale)/OFFSET_MAX);  self.mIDdleImageVIEw.layer.transformScale = 1 - 0.1*(fabs(offScale)/OFFSET_MAX); } else {  //左滑  self.rightimageVIEw.layer.transformScale = 1 + 1.0/9*(fabs(offScale)/OFFSET_MAX);  self.mIDdleImageVIEw.layer.transformScale = 1 - 0.1*(fabs(offScale)/OFFSET_MAX); } } - (voID)scrollVIEwDIDEndDragging:(UIScrollVIEw *)scrollVIEw willDecelerate:(BOol)decelerate { CGPoint offset = scrollVIEw.contentOffset;  self.offsetX = offset.x;  if ((fabs(self.offsetX-OFFSET_MAX) >= OFFSET_MAX*0.5)) {  if (!decelerate) {   //替换图片   [self exchangeImage];  } } else {  //回d复位  [scrollVIEw setContentOffset:CGPointMake(OFFSET_MAX,0) animated:YES];  self.leftIamgeVIEw.layer.transform = CAtransform3DIDentity;  self.mIDdleImageVIEw.layer.transform = CAtransform3DIDentity;  self.rightimageVIEw.layer.transform = CAtransform3DIDentity; }} - (voID)scrollVIEwDIDEndDecelerating:(UIScrollVIEw *)scrollVIEw { //替换图片 [self exchangeImage];} #pragma mark ---------- exchangeImage ------//替换图片- (voID)exchangeImage { if (self.offsetX-OFFSET_MAX < 0) {  //右滑  UIImage *rightimage = self.rightimageVIEw.image;  self.rightimageVIEw.image = self.mIDdleImageVIEw.image;  self.mIDdleImageVIEw.image = self.leftIamgeVIEw.image;  self.leftIamgeVIEw.image = rightimage;   if (self.pageControl.currentPage - 1 < 0) {   self.pageControl.currentPage = self.pageControl.numberOfPages-1;  } else {   self.pageControl.currentPage -= 1;  }  } else {  //左滑  UIImage *leftimage = self.leftIamgeVIEw.image;  self.leftIamgeVIEw.image = self.mIDdleImageVIEw.image;  self.mIDdleImageVIEw.image = self.rightimageVIEw.image;  self.rightimageVIEw.image = leftimage;   if (self.pageControl.currentPage + 1 >= self.pageControl.numberOfPages) {   self.pageControl.currentPage = 0;  } else {   self.pageControl.currentPage += 1;  } } [self.scrollVIEw setContentOffset:CGPointMake(OFFSET_MAX,0)]; self.leftIamgeVIEw.layer.transform = CAtransform3DIDentity; self.mIDdleImageVIEw.layer.transform = CAtransform3DIDentity; self.rightimageVIEw.layer.transform = CAtransform3DIDentity;} #pragma mark ---------- timer --------- (voID)timerAction { self.offsetX = kScreenWIDth+OFFSET_MAX-64;  self.timerAnimation = YES; [UIVIEw animateWithDuration:0.8 animations:^{  [self.scrollVIEw setContentOffset:CGPointMake(self.offsetX,0)];  self.rightimageVIEw.layer.transformScale = 10/9.0;  self.mIDdleImageVIEw.layer.transformScale = 0.9; } completion:^(BOol finished) {  self.timerAnimation = NO;  [self exchangeImage];  self.rightimageVIEw.layer.transform = CAtransform3DIDentity;  self.mIDdleImageVIEw.layer.transform = CAtransform3DIDentity; }];} @end 

最后调用：

self.scrollVIEw = [[CustomScrollVIEw alloc] initWithFrame:CGRectMake(0,kScreenWIDth,170)];[self.vIEw addSubvIEw:self.scrollVIEw]; 

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