iOS 选取上传图片界面

  1 //
  2 //  MainViewController.m
  3 //  AddPhoto
  4 //
  5 //  Created by ChenJungang on 14/11/20.
  6 //  Copyright (c) 2014年 ChenJungang. All rights reserved.
  7 //
  8 
  9 #import "MainViewController.h"
 10 #import "CustomFlowLayout.h"
 11 #import "PhotoCell.h"
 12 #import "ResuableView.h"
 13 #import <MobileCoreServices/MobileCoreServices.h>
 14 #import "DetailViewController.h"
 15 
 16 
 17 #define kImage              @"kImage"
 18 #define kImageData          @"kImageData"
 19 #define kImageReferenceUrl  @"kImageReferenceUrl"
 20 
 21 
 22 static NSString *itemIdentifier = @"ItemIdentifier";
 23 static NSString *footerReuseId = @"footerReuseId";
 24 
 25 @interface MainViewController ()<UICollectionViewDataSource,UICollectionViewDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate,ResuableViewDelegate,UIActionSheetDelegate>
 26 
 27 @property (strong, nonatomic)UICollectionView   *collectionView;
 28 @property (strong, nonatomic)CustomFlowLayout   *customFlowLayout;
 29 @property (strong, nonatomic)NSMutableArray     *imageArray;
 30 @property (strong, nonatomic)NSIndexPath        *indexPath;
 31 
 32 @end
 33 
 34 @implementation MainViewController
 35 
 36 - (instancetype)init{
 37     self = [super init];
 38     if (self) {
 39         _imageArray = [NSMutableArray array];
 40     }
 41     return self;
 42 }
 43 
 44 - (void)viewDidLoad {
 45     [super viewDidLoad];
 46     // Do any additional setup after loading the view from its nib.
 47     self.title = @"add photo";
 48     
 49     _customFlowLayout = [CustomFlowLayout new];
 50     _collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(10, 64, [[UIScreen mainScreen] bounds].size.width - 20, 60)
 51                                          collectionViewLayout:_customFlowLayout];
 52     _collectionView.backgroundColor = [UIColor whiteColor];
 53     
 54     if( ([[[UIDevice currentDevice] systemVersion] doubleValue]>=7.0)) {
 55         self.edgesForExtendedLayout = UIRectEdgeNone;
 56     }
 57     
 58     [self.collectionView registerClass:[PhotoCell class]
 59             forCellWithReuseIdentifier:itemIdentifier];
 60 
 61     [self.collectionView registerClass:[ResuableView class]
 62             forSupplementaryViewOfKind:UICollectionElementKindSectionFooter
 63                    withReuseIdentifier:footerReuseId];
 64     
 65     _collectionView.dataSource = self;
 66     _collectionView.delegate = self;
 67     
 68     [self.view addSubview:_collectionView];
 69 }
 70 
 71 #pragma mark - UICollectionViewDataSource
 72 -(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
 73 {
 74     return [_imageArray count];
 75 }
 76 
 77 -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
 78 {
 79     PhotoCell *cell =  80     [collectionView dequeueReusableCellWithReuseIdentifier:itemIdentifier
 81                                               forIndexPath:indexPath];
 82     
 83     if ([_imageArray count] != 0) {
 84         cell.showImageView.image = _imageArray[indexPath.row][kImage];
 85     }
 86     
 87     return cell;
 88 }
 89 
 90 #pragma mark - UICollectionViewDelegate
 91 
 92 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
 93     NSLog(@"row : %d",indexPath.row);
 94     
 95     
 96     _indexPath = indexPath;
 97     UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"操作" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"删除" otherButtonTitles:@"查看", nil];
 98     [actionSheet showInView:self.view];
 99     
100 }
101 
102 - (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
103     
104     ResuableView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter
105                                                                   withReuseIdentifier:footerReuseId
106                                                                          forIndexPath:indexPath];
107     _indexPath = indexPath;
108     footerView.delegate = self;
109 
110     return footerView;
111 }
112 
113 #pragma mark - UIActionSheetDelegate
114 
115 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
116     
117     switch (buttonIndex) {
118         case 0:{
119             if ([_imageArray count] != 0) {
120                 [_imageArray removeObjectAtIndex:_indexPath.row];
121                 [self.collectionView reloadData];
122             }
123             break;
124         }
125         case 1:{
126             DetailViewController *detailVC = [[DetailViewController alloc] init];
127             detailVC.image = _imageArray[_indexPath.row][kImage];
128             [self presentViewController:detailVC animated:YES completion:nil];
129             break;
130         }
131         default:
132             break;
133     }
134 }
135 
136 
137 #pragma mark - UIImagePickerControllerDelegate
138 
139 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
140     if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(NSString *)kUTTypeImage]) {
141         
142         if ([_imageArray count] != 0) {
143             for (NSDictionary *dic in _imageArray) {
144                 if ([[info objectForKey:UIImagePickerControllerReferenceURL] isEqual:[dic objectForKey:kImageReferenceUrl]]) {
145                     return [self dismissViewControllerAnimated:YES completion:^{
146                         [MBHUDHelper showWarningWithText:@"该图片已经选择"];
147                     }];
148                 }
149             }
150         }
151         //取出选中图片的信息
152         UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
153         NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
154         NSString *referenceUrl = [info objectForKey:UIImagePickerControllerReferenceURL];
155         
156         NSDictionary *imageInfoDic = @{kImage:image, kImageData:imageData, kImageReferenceUrl:referenceUrl};
157         
158         [_imageArray addObject:imageInfoDic];
159         [self.collectionView reloadData];
160         
161         //滚动到最右边
162         if ([_imageArray count] != 0) {
163                     [self.collectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:[_imageArray indexOfObject:[_imageArray lastObject]] inSection:0] atScrollPosition:UICollectionViewScrollPositionRight animated:YES];
164         }
165     }
166     [picker dismissViewControllerAnimated:YES completion:nil];
167 }
168 
169 
170 #pragma mark - ResuableViewDelegate
171 
172 - (void)clickAddPhotoBtnAction{
173     [self getPhotoFromPhotoLibrary:UIImagePickerControllerSourceTypePhotoLibrary];
174 }
175 
176 -(void)getPhotoFromPhotoLibrary:(UIImagePickerControllerSourceType)sourceType
177 {
178     NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:sourceType];
179     if([UIImagePickerController isSourceTypeAvailable:sourceType] && mediaTypes.count > 0)
180     {
181         NSArray *mediaTypes=[UIImagePickerController availableMediaTypesForSourceType:sourceType];
182         UIImagePickerController *picker = [[UIImagePickerController alloc] init];
183         picker.mediaTypes = mediaTypes;
184         picker.delegate = self;
185         picker.allowsEditing = YES;
186         picker.sourceType = sourceType;
187         NSString *requiredMediaType = (NSString *)kUTTypeImage;
188         NSArray *arrMediaTypes = [NSArray arrayWithObject:requiredMediaType];
189         [picker setMediaTypes:arrMediaTypes];
190         [self presentViewController:picker animated:YES completion:nil];
191     }else{
192         UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"错误信息!" message:@"当前设备不支持拍摄功能" delegate:nil cancelButtonTitle:@"确认" otherButtonTitles: nil];
193         [alert show];
194     }
195 }
196 
197 - (void)didReceiveMemoryWarning {
198     [super didReceiveMemoryWarning];
199     // Dispose of any resources that can be recreated.
200 }
201 
202 
203 @end

 1 //
 2 //  CustomFlowLayout.m
 3 //  AddPhoto
 4 //
 5 //  Created by ChenJungang on 14/11/20.
 6 //  Copyright (c) 2014年 ChenJungang. All rights reserved.
 7 //
 8 
 9 #import "CustomFlowLayout.h"
10 
11 @implementation CustomFlowLayout
12 - (instancetype)init
13 {
14     self = [super init];
15     if (self)
16     {
17         self.itemSize                = CGSizeMake(50, 50);                  // 单元格尺寸
18         self.sectionInset            = UIEdgeInsetsMake(0, 0, 0, 0);        // 单元格边缘
19         self.minimumInteritemSpacing = 2.0f;                                // 横排单元格最小间隔
20         self.minimumLineSpacing      = 2.0f;                                // 单元格最小行间距
21         self.scrollDirection = UICollectionViewScrollDirectionHorizontal;   // 滚动方向
22         self.footerReferenceSize     = CGSizeMake(50, 50);                  // footerView 的尺寸
23         
24     }
25     return self;
26 }
27 
28 @end

 1 //
 2 //  PhotoCell.m
 3 //  AddPhoto
 4 //
 5 //  Created by ChenJungang on 14/11/20.
 6 //  Copyright (c) 2014年 ChenJungang. All rights reserved.
 7 //
 8 
 9 #import "PhotoCell.h"
10 
11 @implementation PhotoCell
12 
13 - (void)awakeFromNib {
14     // Initialization code
15 }
16 
17 - (id)initWithFrame:(CGRect)frame
18 {
19     self = [super initWithFrame:frame];
20     if (self)
21     {
22         self.backgroundColor = [UIColor whiteColor];
23         
24         CGRect rect = self.bounds;
25         rect.origin.x    += 3;
26         rect.origin.y    += 3;
27         rect.size.height -= 6;
28         rect.size.width  -= 6;
29         
30         _showImageView = [[UIImageView alloc] initWithFrame:rect];
31         _showImageView.contentMode = UIViewContentModeScaleAspectFill;
32         
33         _showImageView.layer.masksToBounds = YES;
34         [self addSubview:_showImageView];
35     }
36     
37     return self;
38 }
39 
40 @end

 1 //
 2 //  ResuableView.h
 3 //  AddPhoto
 4 //
 5 //  Created by ChenJungang on 14/11/20.
 6 //  Copyright (c) 2014年 ChenJungang. All rights reserved.
 7 //
 8 
 9 #import <UIKit/UIKit.h>
10 
11 @protocol ResuableViewDelegate <NSObject>
12 
13 - (void)clickAddPhotoBtnAction;
14 
15 @end
16 
17 @interface ResuableView : UICollectionReusableView
18 
19 @property (nonatomic, strong) id<ResuableViewDelegate>delegate;
20 
21 @end

 1 //
 2 //  ResuableView.m
 3 //  AddPhoto
 4 //
 5 //  Created by ChenJungang on 14/11/20.
 6 //  Copyright (c) 2014年 ChenJungang. All rights reserved.
 7 //
 8 
 9 #import "ResuableView.h"
10 
11 @interface ResuableView()
12 @property (nonatomic, strong) UIButton  *addPhotoBtn;
13 @end
14 
15 @implementation ResuableView
16 
17 -(instancetype)initWithFrame:(CGRect)frame{
18     self = [super initWithFrame:frame];
19     if (self) {
20         
21         self.backgroundColor = [UIColor whiteColor];
22         
23         CGRect rect = self.bounds;
24         rect.origin.x    += 3;
25         rect.origin.y    += 6;
26         rect.size.height -= 12;
27         rect.size.width  -= 6;
28         
29         _addPhotoBtn = [[UIButton alloc] initWithFrame:rect];
30         _addPhotoBtn.contentMode = UIViewContentModeScaleAspectFill;
31         [_addPhotoBtn setImage:[UIImage imageNamed:@"addImage.png"] forState:UIControlStateNormal];
32         _addPhotoBtn.layer.masksToBounds = YES;
33         [self addSubview:_addPhotoBtn];
34         
35         [_addPhotoBtn addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
36         
37     }
38     return self;
39 }
40 
41 - (void)buttonAction:(id)sender{
42     if ([_delegate respondsToSelector:@selector(clickAddPhotoBtnAction)]) {
43         [_delegate clickAddPhotoBtnAction];
44     }
45 }
46 
47 @end