iOS uitableview自定义相册（实现拍照并保存在指定目录以相册的形式展示图片）

原理：

图片的展示是通过uitableview实现。照片的展示以及选择（uitableviewce’l’l）是通过俩个uibutton的叠加完成。通过设置每个uibutton的tag，并在viewcontroller中实现cell的delegate来实现对uibutton的监听。

.h文件

#import <UIKit/UIKit.h>
#import "PhotoObject.h"
#import "Comm.h"
#import "PhotoTableViewCell.h"
#import "MBProgressHUD.h"

@protocol PhotoViewControllerDelegate <NSObject>

-(void)passSelectPhoto :(NSMutableArray *) array;

@end

@interface PhotoViewController : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate,UITableViewDelegate,UITableViewDataSource,PhotoTableViewCellDelegate>
{

NSFileManager *fileMgr;
NSMutableArray *photoArray;
NSString * photoSavePath;
NSString * photoFileName;

MBProgressHUD *HUD;

NSMutableArray *passmutableArray;

NSString *datafiloderpath;
}
@property (strong, nonatomic) IBOutlet UITableView *photoTableView;
@property (strong, nonatomic) IBOutlet UIView *backBtn;
@property (strong, nonatomic) IBOutlet UIButton *tackPhotoBtn;
@property (strong, nonatomic) IBOutlet UIButton *cancelBtn;
@property (strong, nonatomic) IBOutlet UIButton *finishBtn;
@property (strong, nonatomic)  id <PhotoViewControllerDelegate> delegate;

.m文件

#import "PhotoViewController.h"
#import "AppDelegate.h"

@interface PhotoViewController ()

@end

@implementation PhotoViewController
@synthesize photoTableView;
@synthesize finishBtn;

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.

[AppDelegate storyBoradAutoLay:self.view];

fileMgr = [NSFileManager defaultManager];
photoArray=[[NSMutableArray alloc]init];
passmutableArray=[[NSMutableArray alloc] init];

HUD = [[MBProgressHUD alloc] initWithFrame:CGRectMake(self.view.frame.size.width/2, self.view.frame.size.height/2, 300, 100)];
[self.view addSubview:HUD];

//如果设置此属性则当前的view置于后台
// HUD.dimBackground = YES;

//设置对话框文字
HUD.labelText = @"获取照片数据中";

//显示对话框
[HUD showAnimated:YES whileExecutingBlock:^{
//对话框显示时需要执行的操作
//指向文件目录
NSDate *  date=[NSDate date];
NSDateFormatter  *dateformatter=[[NSDateFormatter alloc] init];
[dateformatter setDateFormat:@"YYYY-MM-dd"];
NSString *datefloder= [dateformatter stringFromDate:date];
datafiloderpath=[NSString stringWithFormat:@"%@/",datefloder];
NSString *documentsDirectory= [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
photoSavePath=[NSString stringWithFormat:@"%@/%@%@", documentsDirectory,photoPath,datafiloderpath];
if (![fileMgr fileExistsAtPath:photoSavePath])
{
[fileMgr createDirectoryAtPath:photoSavePath withIntermediateDirectories:YES attributes:nil error:nil];
}
photoArray=[self getFilenamelistOfType:@"png" fromDirPath:photoSavePath];

photoTableView.delegate=self;
photoTableView.dataSource=self;

sleep(5);
} completionBlock:^{
//操作执行完后取消对话框

//[photoTableView reloadData];
[HUD removeFromSuperview];

}];
}
-(void)viewDidUnload
{

}
-(void)viewDidLayoutSubviews
{

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)btnControll:(UIButton *)sender {
switch (sender.tag) {
//返回
case 0:
[self dismissModalViewControllerAnimated:YES];
[self.delegate passSelectPhoto:passmutableArray];
break;

// 拍照
case 1:
[ self takePic ];
break;
// 取消
case 2:
[self dismissModalViewControllerAnimated:YES];
[self.delegate passSelectPhoto:passmutableArray];
break;

//确定
case 3:
[self dismissModalViewControllerAnimated:YES];
[self.delegate passSelectPhoto:passmutableArray];
break;

default:
break;
}
}

-(NSMutableArray *)getFilenamelistOfType:(NSString *)type fromDirPath:(NSString *)dirPath
{
NSMutableArray *filenamelist = [[NSMutableArray alloc]init];
NSArray *tmplist = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:dirPath error:nil];

for (NSString *filename in tmplist) {
NSString *fullpath = [dirPath stringByAppendingPathComponent:filename];
if ([self isFileExistAtPath:fullpath]) {
if ([[filename pathExtension] isEqualToString:type]) {
PhotoObject *ob=[[PhotoObject alloc]init];
ob.PhotoName=filename;
ob.PhotoPath=fullpath;
ob.PhotoIsChecked=NO;
[filenamelist addObject:ob];
}
}
}

return filenamelist;
}

-(BOOL)isFileExistAtPath:(NSString*)fileFullPath {
BOOL isExist = NO;
isExist = [[NSFileManager defaultManager] fileExistsAtPath:fileFullPath];
return isExist;
}

-(void)takePic
{

//先设定sourceType为相机，然后判断相机是否可用（ipod）没相机，不可用将sourceType设定为相片库
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
//sourceType = UIImagePickerControllerSourceTypeCamera; //照相机
//sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //图片库
//sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片
UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化
picker.delegate = self;
picker.allowsEditing = NO;//设置可编辑
picker.sourceType = sourceType;
if([[[UIDevice
currentDevice] systemVersion] floatValue]>=8.0) {

self.modalPresentationStyle=UIModalPresentationOverCurrentContext;

}
[self presentModalViewController:picker animated:YES];//进入照相界面

}
-(UIImage *) addOverlayToBaseImage :(UIImage *) img
{

return img;
}

-(UIImage *)changImageRotation:(UIImage *)image rotation:(UIImageOrientation)orientation
{
long double rotate = 0.0;
CGRect rect;
float translateX = 0;
float translateY = 0;
float scaleX = 1.0;
float scaleY = 1.0;

switch (orientation) {
case UIImageOrientationLeft:
rotate = M_PI_2;
rect = CGRectMake(0, 0, image.size.height, image.size.width);
translateX = 0;
translateY = -rect.size.width;
scaleY = rect.size.width/rect.size.height;
scaleX = rect.size.height/rect.size.width;
break;
case UIImageOrientationRight:
rotate = 3 * M_PI_2;
rect = CGRectMake(0, 0, image.size.height, image.size.width);
translateX = -rect.size.height;
translateY = 0;
scaleY = rect.size.width/rect.size.height;
scaleX = rect.size.height/rect.size.width;
break;
case UIImageOrientationDown:
rotate = M_PI;
rect = CGRectMake(0, 0, image.size.width, image.size.height);
translateX = -rect.size.width;
translateY = -rect.size.height;
break;
default:
rotate = 0.0;
rect = CGRectMake(0, 0, image.size.width, image.size.height);
translateX = 0;
translateY = 0;
break;
}

UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
//做CTM变换
CGContextTranslateCTM(context, 0.0, rect.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextRotateCTM(context, rotate);
CGContextTranslateCTM(context, translateX, translateY);

CGContextScaleCTM(context, scaleX, scaleY);
//绘制图片
CGContextDrawImage(context, CGRectMake(0, 0, rect.size.width, rect.size.height), image.CGImage);

UIImage *newPic = UIGraphicsGetImageFromCurrentImageContext();

return newPic;
}

- (UIImage *)compressImage:(UIImage *)image toMaxFileSize:(NSInteger)maxFileSize {
CGFloat compression = 0.9f;
CGFloat maxCompression = 0.1f;
NSData *imageData = UIImageJPEGRepresentation(image, compression);
while ([imageData length] > maxFileSize && compression > maxCompression) {
compression -= 0.1;
imageData = UIImageJPEGRepresentation(image, compression);
}

UIImage *compressedImage = [UIImage imageWithData:imageData];
return compressedImage;
}

#pragma UIImagePickerControllerDelegate
// 选择了图片或者拍照
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{

UIImage *baseImage = [info objectForKey:UIImagePickerControllerOriginalImage];
// baseImage=  [self changImageRotation:baseImage rotation:90 ];
baseImage=[self imageByScalingToSize:CGSizeMake(320, 480) :baseImage];
baseImage=[self compressImage:baseImage toMaxFileSize:100];
if (baseImage == nil)
return;
UIImage *  compositeImage = [self addOverlayToBaseImage:baseImage];
//NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSDate* date = [NSDate date];
NSDateFormatter* formatter = [[NSDateFormatter alloc] init] ;
[formatter setDateFormat:@"yyyyMMddHHMMSS"];
NSString* str = [formatter stringFromDate:date];
photoFileName=[NSString stringWithFormat:@"%@%@",str,@".png"];
//给照片按拍摄时间命名
NSString *uniquePath=[photoSavePath stringByAppendingPathComponent:photoFileName];
NSLog(@"-----%@",uniquePath);
BOOL result=[UIImageJPEGRepresentation(compositeImage, 0.5) writeToFile: uniquePath atomically:YES];
if (result)
{
PhotoObject *ob=[[PhotoObject alloc]init];
ob.PhotoName=photoFileName;
ob.PhotoPath=uniquePath;
ob.PhotoIsChecked=NO;
[photoArray addObject:ob];
[photoTableView reloadData];
NSLog(@"success");
}
[self dismissModalViewControllerAnimated:YES];

}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{

[picker dismissViewControllerAnimated:YES completion:nil];

}

- (UIImage *)imageByScalingToSize:(CGSize)targetSize :(UIImage *)image
{
UIImage *sourceImage = image;
UIImage *newImage = nil;

CGSize imageSize = sourceImage.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;

CGFloat targetWidth = targetSize.width;
CGFloat targetHeight = targetSize.height;

CGFloat scaleFactor = 0.0;
CGFloat scaledWidth = targetWidth;
CGFloat scaledHeight = targetHeight;

CGPoint thumbnailPoint = CGPointMake(0.0,0.0);

if (!CGSizeEqualToSize(imageSize, targetSize)) {
CGFloat widthFactor = targetWidth / width;
CGFloat heightFactor = targetHeight / height;
if (widthFactor < heightFactor)
scaleFactor = widthFactor;
else
scaleFactor = heightFactor;
scaledWidth  = width * scaleFactor;
scaledHeight = height * scaleFactor;

// center the image

if (widthFactor < heightFactor) {
thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
} else if (widthFactor > heightFactor) {
thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
}
}

// this is actually the interesting part:

UIGraphicsBeginImageContext(targetSize);

CGRect thumbnailRect = CGRectZero;
thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width  = scaledWidth;
thumbnailRect.size.height = scaledHeight;

[sourceImage drawInRect:thumbnailRect];

newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

if(newImage == nil) NSLog(@"could not scale image");

return newImage ;
}

#pragma tableViewDelegate

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

if (photoArray.count%3==0) {
return photoArray.count/3;
}
else
{
return photoArray.count/3+1;
}
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

return 1;

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

//指定cellIdentifier为自定义的cell
static NSString *CellIdentifier = @"PhotoTableViewCell";
//自定义cell类
PhotoTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
//通过xib的名称加载自定义的cell
cell = [[[NSBundle mainBundle] loadNibNamed:@"PhotoTableViewCell" owner:self options:nil] lastObject];
cell.delegate=self;

}
PhotoObject *object=[[PhotoObject alloc] init];
UIImage *sourceimage=[[UIImage alloc]init];
UIImage *imagethu=[[UIImage alloc]init];
NSInteger cellcount=3;
NSLog(@"%d",indexPath.row);
int lastRow=photoArray.count/3;
int lastCount=photoArray.count%3;
if (lastCount!=0) {
}
else
{
lastRow= lastRow+1;
}
if(lastRow==indexPath.row){
cell.imageBtn1.hidden=YES;
cell.imageBtn2.hidden=YES;
cell.imageBtn3.hidden=YES;

cell.imageBgBtn1.hidden=YES;
[cell.imageBgBtn1 setUserInteractionEnabled:NO];
cell.imageBgBtn2.hidden=YES;
[cell.imageBgBtn2 setUserInteractionEnabled:NO];
cell.imageBgBtn3.hidden=YES;
[cell.imageBgBtn3 setUserInteractionEnabled:NO];

if(lastCount==1){
cell.imageBtn1.hidden=NO;
cell.imageBgBtn1.hidden=NO;

cell.imageBtn1.tag=3*indexPath.row;
object=[photoArray objectAtIndex:(3*indexPath.row)];
if (object.PhotoIsChecked) {
[ cell.imageBtn1 setImage:[UIImage imageNamed:@"abc_btn_check_to_on_mtrl_015.png"] forState:UIControlStateNormal];
}
sourceimage=[UIImage imageWithContentsOfFile:object.PhotoPath];
//  imagethu=[self imageByScalingToSize:CGSizeMake(98, 98) :sourceimage];
[cell.imageBgBtn1 setBackgroundImage:sourceimage forState:UIControlStateNormal];
}

if(lastCount==2){
cell.imageBtn1.hidden=NO;
cell.imageBgBtn1.hidden=NO;
cell.imageBtn1.tag=3*indexPath.row;
object=[photoArray objectAtIndex:(3*indexPath.row)];
sourceimage=[UIImage imageWithContentsOfFile:object.PhotoPath];
// imagethu=[self imageByScalingToSize:CGSizeMake(98, 98) :sourceimage];
[cell.imageBgBtn1 setBackgroundImage:sourceimage forState:UIControlStateNormal];

cell.imageBtn2.hidden=NO;
cell.imageBgBtn2.hidden=NO;
cell.imageBtn2.tag=3*indexPath.row+1;
NSLog(@"%d",3*indexPath.row+1);
object=[photoArray objectAtIndex:(3*indexPath.row+1)];
sourceimage=[UIImage imageWithContentsOfFile:object.PhotoPath];
// imagethu=[self imageByScalingToSize:CGSizeMake(98, 98) :sourceimage];
[cell.imageBgBtn2 setBackgroundImage:sourceimage forState:UIControlStateNormal];
}

}else{
cell.imageBtn1.tag=3*indexPath.row;
object=[photoArray objectAtIndex:(3*indexPath.row)];
sourceimage=[UIImage imageWithContentsOfFile:object.PhotoPath];
// imagethu=[self imageByScalingToSize:CGSizeMake(90, 73) :sourceimage];
[cell.imageBgBtn1 setBackgroundImage:sourceimage forState:UIControlStateNormal];

cell.imageBtn2.tag=3*indexPath.row+1;
object=[photoArray objectAtIndex:(3*indexPath.row+1)];
sourceimage=[UIImage imageWithContentsOfFile:object.PhotoPath];
//imagethu=[self imageByScalingToSize:CGSizeMake(90, 73) :sourceimage];
[cell.imageBgBtn2 setBackgroundImage:sourceimage forState:UIControlStateNormal];

cell.imageBtn3.tag=3*indexPath.row+2;
object=[photoArray objectAtIndex:(3*indexPath.row+2)];
sourceimage=[UIImage imageWithContentsOfFile:object.PhotoPath];
//imagethu=[self imageByScalingToSize:CGSizeMake(90, 73) :sourceimage];
[cell.imageBgBtn3 setBackgroundImage:sourceimage forState:UIControlStateNormal];
}
return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

NSLog(@"%d",indexPath.row);
[tableView deselectRowAtIndexPath:indexPath animated:YES];//选中后的反显颜色即刻消失

}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{

return 110;
}
int selectcount=0;
#pragma Phototableviewcelldelegate
- (void)SelectImageClicked:(UIButton *)button
{
NSInteger s=button.tag;
PhotoObject *sm=[photoArray objectAtIndex:s];

if (sm.PhotoIsChecked) {
sm.PhotoIsChecked=NO;
if (selectcount==0) {

return;
}
else
{
selectcount=selectcount-1;
[passmutableArray removeObject:sm];
[ button setImage:[UIImage imageNamed:@"abc_btn_check_to_on_mtrl_000.png"] forState:UIControlStateNormal];
NSString *btntile=[NSString stringWithFormat:@"完成(%d/5)",selectcount];
//finishBtn.titleLabel.text=btntile;
[finishBtn setTitle:btntile forState:(UIControlStateNormal)];
}

}else
{
if (selectcount>5) {

return;
}
else
{
selectcount=selectcount+1;
sm.PhotoIsChecked=YES;
[ button setImage:[UIImage imageNamed:@"abc_btn_check_to_on_mtrl_015.png"] forState:UIControlStateNormal];
[passmutableArray addObject:sm];

NSString *btntile=[NSString stringWithFormat:@"完成(%d/5)",selectcount];
//finishBtn.titleLabel.text=btntile;
[finishBtn setTitle:btntile forState:(UIControlStateNormal)];
}

}

NSLog(@"%d",button.tag);

}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/

@end

cell的代理

cell.h

@protocol PhotoTableViewCellDelegate <NSObject>

- (void)SelectImageClicked:(UIButton *)button;
;

@end

cell.m

- (IBAction)imageBtnClicked:(UIButton *)sender {
[self.delegate SelectImageClicked:sender];
}

未实现：

1.点击图片，出现图片展示

2.当单个文件夹中，图片过多时，加载较慢