思路：使用UICollectionView显示图片，点击查看大图，代码如下：
#import <UIKit/UIKit.h>
/** 九宫格排列图片*/
@interface ZJPhotoAlumView : UIView
/** 展示图片
* @param imageStrs 可以是本地图片名称也可是网络图片地址 */
- (void)showImagesWithImageStrs:(NSArray<NSString*>*)imageStrs;
/** 是否在末尾展示添加按钮*/
- (void)showPhotoAlumAddImage:(BOOL)show clickBlock:(void(^)(void))block;
/** 大图展示时是否显示删除按钮
* @param block 回调删除后的集合和当前显示第一张*/
- (void)showDeleteBtnBackBlock:(void(^)(NSArray <NSString*>*imageStrs,NSInteger currentIndex))block;
@end
/** 全屏查看图片原图 */
@interface ZJOriginalImageView : UIView
/** 展示大图
* @param imageStrs 可以是本地图片名称也可是网络图片地址
* @param currentIndex 默认显示第几张图*/
- (void)showImagesWithImageStrs:(NSArray<NSString*>*)imageStrs defaultCurrentIndex:(NSInteger)currentIndex;
/** 显示删除按钮
* @param block 回调删除后的集合和当前显示第一张*/
- (void)showDeleteBtnBackBlock:(void(^)(NSArray <NSString*>*imageStrs,NSInteger currentIndex))block;
/** 设置当前显示图片的frame */
- (void)setDefaultCurrentIndexSubViewFrame:(CGRect)frame;
/** 点击当前图片的回调 */
- (void)didSelectSubviewAtIndex:(void(^)(NSInteger index))block;
@end
#import "ZJPhotoAlumView.h"
@class ZJOriginalImageView;
// 边距
#define KZJPhotoAlumSubMargin 5
// 每一行排列的个数
#define KZJPhotoAlumColumns 3
// 动画时间
#define KZJPhotoAlumAnimateTime 0.3
@interface ZJPhotoAlumView ()<UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>
@property(nonatomic,copy) void(^viewSubViewClickBlock)(id model,NSInteger tag);
@property(nonatomic,weak) UICollectionView * collect;
@property(nonatomic,strong) NSMutableArray <NSString*>* dataArray;
@property(nonatomic,strong) ZJOriginalImageView * originalImageView;
@property(nonatomic,assign) BOOL showAddImage;
@property(nonatomic,copy) void(^addImageClickBlock)(void);
@end
@implementation ZJPhotoAlumView
- (instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
[self setShowAddImage:false];
[self setSubViews];
[self handleSelfHeightWithImageStrs];
[self handleOriginalImagesBlock];
}
return self;
}
-(void)setFrame:(CGRect)frame{
[super setFrame:frame];
CGRect newframe = [[self collect] frame];
newframe.size = frame.size;
[[self collect] setFrame:newframe];
}
-(void)loadData{
[self setDataArray:[NSMutableArray array]];
[[self dataArray] addObject:@"好像没有网络~"];
[[self dataArray] addObject:@"空订单"];
[[self dataArray] addObject:@"空购物车"];
[[self dataArray] addObject:@"空消息"];
[[self dataArray] addObject:@"guide_icon01"];
[[self dataArray] addObject:@"guide_icon02"];
[[self dataArray] addObject:@"guide_icon03"];
[[self dataArray] addObject:@"安全"];
[[self dataArray] addObject:@"报警"];
[[self dataArray] addObject:@"更多"];
}
-(ZJOriginalImageView *)originalImageView{
if(!_originalImageView){
CGSize size = [[UIScreen mainScreen] bounds].size;
CGRect subframe = CGRectMake(0, 0, size.width, size.height);
_originalImageView = [[ZJOriginalImageView alloc] initWithFrame:subframe];
[_originalImageView setBackgroundColor:[UIColor blackColor]];
}
return _originalImageView;
}
-(void)setSubViews{
CGRect subframe = CGRectMake(0, 0, CGRectGetWidth([self frame]), CGRectGetHeight([self frame]));
UICollectionViewFlowLayout * layout = [UICollectionViewFlowLayout new];
[layout setMinimumInteritemSpacing:KZJPhotoAlumSubMargin*0.8];
[layout setMinimumLineSpacing:KZJPhotoAlumSubMargin];
UICollectionView * subview = [[UICollectionView alloc] initWithFrame:subframe collectionViewLayout:layout];
[subview setDataSource:self];
[subview setDelegate:self];
[subview registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];
[subview setBackgroundColor:[UIColor whiteColor]];
[self addSubview:subview];
[self setCollect:subview];
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [self showAddImage] == true ? [[self dataArray] count]+1 : [[self dataArray] count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
if([cell viewWithTag:101] == nil){
CGRect subframe = CGRectMake(0, 0, CGRectGetWidth([cell frame]), CGRectGetHeight([cell frame]));
UIImageView * subview = [[UIImageView alloc] initWithFrame:subframe];
[subview setTag:101];
[cell addSubview:subview];
}
UIImageView * subview = (UIImageView *)[cell viewWithTag:101];
if([indexPath item]<[[self dataArray]count]){
[self imageView:subview imageString:[[self dataArray] objectAtIndex:[indexPath item]]];
}else{
[subview setImage:[UIImage imageNamed:@"b"]];
}
return cell;
}
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
if([indexPath item]<[[self dataArray]count]){
[self showOriginalImagesWithCurrentIndex:[indexPath item]];
}else if([self addImageClickBlock]){
self.addImageClickBlock();
}
}
-(UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{
return UIEdgeInsetsMake(KZJPhotoAlumSubMargin, KZJPhotoAlumSubMargin, KZJPhotoAlumSubMargin, KZJPhotoAlumSubMargin);
}
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
CGFloat subWidth = (CGRectGetWidth([self frame])-(KZJPhotoAlumColumns+1)*KZJPhotoAlumSubMargin)*1.0/KZJPhotoAlumColumns;
return CGSizeMake(subWidth, subWidth);
}
#pragma mark ********************************************
-(void)imageView:(UIImageView*)imgView imageString:(NSString*)string{
if([UIImage imageNamed:string]){ // 本地图片名称
[imgView setImage:[UIImage imageNamed:string]];
}else if([UIImage imageWithContentsOfFile:string]){// 本地图片路径
[imgView setImage:[UIImage imageWithContentsOfFile:string]];
}else{ // 网络图片
}
}
-(void)handleSelfHeightWithImageStrs{
NSInteger count = [self showAddImage]==true?[[self dataArray]count]+1:[[self dataArray]count];
CGFloat subWidth = (CGRectGetWidth([self frame])-(KZJPhotoAlumColumns+1)*KZJPhotoAlumSubMargin)*1.0/KZJPhotoAlumColumns;
NSInteger row = count%KZJPhotoAlumColumns==0?count/KZJPhotoAlumColumns:(count/KZJPhotoAlumColumns+1);
CGFloat height = (subWidth+KZJPhotoAlumSubMargin)*row+KZJPhotoAlumSubMargin;
CGRect newFrame = [self frame];
newFrame.size.height = height;
[self setFrame:newFrame];
}
#pragma mark 获取点击图片的frame
- (CGRect)getConverFrameWithCurrentIndex:(NSInteger)index{
NSIndexPath * idnexPath = [NSIndexPath indexPathForItem:index inSection:0];
UICollectionViewCell * cell = [[self collect] cellForItemAtIndexPath:idnexPath];
CGRect newFrame = [self convertRect:[cell frame] fromView:[cell superview]];
return newFrame;
}
-(void)showOriginalImagesWithCurrentIndex:(NSInteger)currentIndex{
CGRect oldFrame = [self getConverFrameWithCurrentIndex:currentIndex];
[[self originalImageView] showImagesWithImageStrs:[self dataArray] defaultCurrentIndex:currentIndex];
[[self originalImageView] setDefaultCurrentIndexSubViewFrame:oldFrame];
[[UIApplication sharedApplication].keyWindow addSubview:[self originalImageView]];
CGSize size = [[UIScreen mainScreen] bounds].size;
CGRect newFrame = CGRectMake(0, 0, size.width, size.height);
[UIView animateWithDuration:KZJPhotoAlumAnimateTime animations:^{
[[self originalImageView] setAlpha:1];
[[self originalImageView] setDefaultCurrentIndexSubViewFrame:newFrame];
}];
}
-(void)handleOriginalImagesBlock{
__weak typeof(self) weakSelf = self;
[[self originalImageView] didSelectSubviewAtIndex:^(NSInteger index) {
CGRect cellFrame = [weakSelf getConverFrameWithCurrentIndex:index];
[UIView animateWithDuration:KZJPhotoAlumAnimateTime animations:^{
[[weakSelf originalImageView] setAlpha:0];
[[weakSelf originalImageView] setDefaultCurrentIndexSubViewFrame:cellFrame];
} completion:^(BOOL finished) {
[[weakSelf originalImageView] removeFromSuperview];
}];
}];
[[self originalImageView] showDeleteBtnBackBlock:^(NSArray<NSString *> *imageStrs, NSInteger currentIndex) {
[weakSelf setDataArray:[NSMutableArray arrayWithArray:imageStrs]];
[weakSelf handleSelfHeightWithImageStrs];
[[weakSelf collect] reloadData];
}];
}
#pragma mark ****************************************************
- (void)showImagesWithImageStrs:(NSArray<NSString*>*)imageStrs{
[self setDataArray:[NSMutableArray arrayWithArray:imageStrs]];
[self handleSelfHeightWithImageStrs];
[[self collect] reloadData];
}
- (void)showPhotoAlumAddImage:(BOOL)show clickBlock:(void(^)(void))block{
[self setShowAddImage:show];
[self setAddImageClickBlock:block];
[[self collect] reloadData];
}
- (void)showDeleteBtnBackBlock:(void(^)(NSArray <NSString*>*imageStrs,NSInteger currentIndex))block{
[[self originalImageView] showDeleteBtnBackBlock:block];
}
@end
#pragma mark - >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
@interface ZJOriginalImageView ()<UIScrollViewDelegate>
@property(nonatomic,weak) UILabel * countMsgLabel;
@property(nonatomic,weak) UIButton * deleteBtn;
@property(nonatomic,strong) NSMutableArray <NSString*>* imageStrs;
@property(nonatomic,weak) UIScrollView * scrollview;
@property(nonatomic,assign) NSInteger currentIndex;
@property(nonatomic,weak) UIImageView * leftImgView;
@property(nonatomic,weak) UIImageView * centerImgView;
@property(nonatomic,weak) UIImageView * rightImgView;
@property(nonatomic,copy) void(^didSelectSubviewAtIndexBlock)(NSInteger index);
@property(nonatomic,copy) void(^deleteBackBlock)(NSArray * array, NSInteger index);
@end
@implementation ZJOriginalImageView
- (instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
[self setSubViews];
}
return self;
}
-(void)setSubViews{
CGRect subframe = CGRectMake(0, 0, CGRectGetWidth([self frame]), CGRectGetHeight([self frame]));
UIScrollView * scroll = [[UIScrollView alloc] initWithFrame:subframe];
[scroll setBounces:true];
[scroll setPagingEnabled:true];
[scroll setShowsVerticalScrollIndicator:false];
[scroll setShowsHorizontalScrollIndicator:false];
[self addSubview:scroll];
[self setScrollview:scroll];
for(int i=0;i<3;i++){
CGRect subframe = CGRectMake(CGRectGetWidth([scroll frame])*i, 0, CGRectGetWidth([scroll frame]), CGRectGetHeight([scroll frame]));
UIImageView * subview01 = [[UIImageView alloc] initWithFrame:subframe];
[subview01 setContentMode:UIViewContentModeScaleAspectFit];
//[subview01 setBackgroundColor:[UIColor redColor]];
[scroll addSubview:subview01];
if(i==0){[self setLeftImgView:subview01];}
if(i==1){[self setCenterImgView:subview01];}
if(i==2){[self setRightImgView:subview01];}
}
subframe = CGRectMake(0, 0, CGRectGetWidth([self frame]), 44.0);
UILabel * label = [[UILabel alloc] initWithFrame:subframe];
[label setFont:[UIFont systemFontOfSize:14]];
[label setTextAlignment:NSTextAlignmentCenter];
[label setBackgroundColor:[UIColor clearColor]];
[label setTextColor:[UIColor whiteColor]];
[self addSubview:label];
[self setCountMsgLabel:label];
subframe = CGRectMake(CGRectGetWidth([self frame])-64.0, 10, 44.0, 44.0);
UIButton * button = [[UIButton alloc] initWithFrame:subframe];
//[button setBackgroundColor:[UIColor orangeColor]];
[button addTarget:self action:@selector(deleteButtonClick) forControlEvents:UIControlEventTouchUpInside];
[button setTitle:@"删除" forState:UIControlStateNormal];
[[button titleLabel] setFont:[UIFont systemFontOfSize:14]];
[button setHidden:true];
[self addSubview:button];
[self setDeleteBtn:button];
UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapClick)];
[self addGestureRecognizer:tap];
}
-(void)deleteButtonClick{
if([[self imageStrs] count]==1){
[[self imageStrs] removeObjectAtIndex:0];
if([self deleteBackBlock]){
self.deleteBackBlock([self imageStrs], 0);
}
[self tapClick];
}else{
[[self imageStrs] removeObjectAtIndex:[self currentIndex]];
if([self currentIndex]>=[[self imageStrs] count]){
[self setCurrentIndex:[[self imageStrs] count]-1];
}
[self setDefaultCurrentIndex:[self currentIndex]];
if([self deleteBackBlock]){
self.deleteBackBlock([self imageStrs], [self currentIndex]);
}
}
}
-(void)tapClick{
if([self didSelectSubviewAtIndexBlock]){
self.didSelectSubviewAtIndexBlock([self currentIndex]);
}
}
-(void)refreshScrollImagesLayoutWithImageStrs:(NSArray*)imageStrs{
if([imageStrs count]==0){
[[self scrollview] setDelegate:nil];
}else if([imageStrs count] ==1){
[[self scrollview] setDelegate:nil];
[self imageView:[self leftImgView] imageString:[imageStrs firstObject]];
}else{
[[self scrollview] setDelegate:self];
[[self scrollview] setContentSize:CGSizeMake([self sw]*3, 0)];
[[self scrollview] setContentOffset:CGPointMake([self sw], 0)];
}
}
#pragma mark *******************************************************
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
[self refrshScrollImageViewAndCurrentIndex];
}
-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
[self refrshScrollImageViewAndCurrentIndex];
}
-(void)refrshScrollImageViewAndCurrentIndex{
// 计算索引
CGFloat offetIndex = [[self scrollview] contentOffset].x/CGRectGetWidth([[self scrollview] frame]);
if(offetIndex == 1){return;}
if(offetIndex>1){// 右往左滑+1
[self setCurrentIndex:[self currentIndex]+1];
if([self currentIndex]>=[[self imageStrs] count]){
// 确保索引范围
[self setCurrentIndex:0];
}
}else if(offetIndex<1){// 左往右滑-1
[self setCurrentIndex:[self currentIndex]-1];
if([self currentIndex] <= -1){
// 确保索引范围
[self setCurrentIndex:[[self imageStrs] count]-1];
}
}
// 更新UIImage
[self handleLeftImageViewWithIndex:[self currentIndex]-1];
[self handleCenterImageViewWithIndex:[self currentIndex]];
[self handleRightImageViewWithIndex:[self currentIndex]+1];
// 保证中心位置
[[self scrollview] setContentOffset:CGPointMake(CGRectGetWidth([[self scrollview] frame]), 0)];
}
-(void)handleLeftImageViewWithIndex:(NSInteger)index{
if(index<= -1){
[self imageView:[self leftImgView] imageString:[[self imageStrs] lastObject]];
}else if(index<=[[self imageStrs] count]-1){
[self imageView:[self leftImgView] imageString:[[self imageStrs] objectAtIndex:index]];
}
}
-(void)handleCenterImageViewWithIndex:(NSInteger)index{
if(index<[[self imageStrs] count]){
[self imageView:[self centerImgView] imageString:[[self imageStrs] objectAtIndex:index]];
}
}
-(void)handleRightImageViewWithIndex:(NSInteger)index{
if(index>=[[self imageStrs] count]){
[self imageView:[self rightImgView] imageString:[[self imageStrs] firstObject]];
}else if(index>=0){
[self imageView:[self rightImgView] imageString:[[self imageStrs] objectAtIndex:index]];
}
}
-(void)imageView:(UIImageView*)imgView imageString:(NSString*)string{
if([UIImage imageNamed:string]){ // 本地图片名称
[imgView setImage:[UIImage imageNamed:string]];
}else if([UIImage imageWithContentsOfFile:string]){// 本地图片路径
[imgView setImage:[UIImage imageWithContentsOfFile:string]];
}else{ // 网络图片
}
}
#pragma mark *******************************************************
- (void)showImagesWithImageStrs:(NSArray<NSString*>*)imageStrs defaultCurrentIndex:(NSInteger)currentIndex{
[self setImageStrs:[NSMutableArray arrayWithArray:imageStrs]];
[self refreshScrollImagesLayoutWithImageStrs:imageStrs];
[self setDefaultCurrentIndex:currentIndex];
}
- (void)showDeleteBtnBackBlock:(void(^)(NSArray <NSString*>*imageStrs,NSInteger currentIndex))block;{
[[self deleteBtn] setHidden:false];
[self setDeleteBackBlock:block];
}
- (void)setDefaultCurrentIndex:(NSInteger)currentIndex{
[self setCurrentIndex:currentIndex];
// 更新UIImage
[self handleLeftImageViewWithIndex:[self currentIndex]-1];
[self handleCenterImageViewWithIndex:[self currentIndex]];
[self handleRightImageViewWithIndex:[self currentIndex]+1];
}
- (void)setDefaultCurrentIndexSubViewFrame:(CGRect)frame{
CGRect newFrame = frame;
newFrame.origin.x += [self sw];
[[self centerImgView] setFrame:newFrame];
}
- (void)didSelectSubviewAtIndex:(void(^)(NSInteger index))block{
[self setDidSelectSubviewAtIndexBlock:block];
}
@end