1、UIImagePickerController初始化

　　UIImagePickerController * picker = [[UIImagePickerController alloc]init];

2、设置属性

　　1）sourceType属性：数据的来源，有三种来源：

　　　　enum {
   　　　　UIImagePickerControllerSourceTypePhotoLibrary,    　　  // 图库
   　　　　UIImagePickerControllerSourceTypeCamera,　　　　　　 // 相机
   　　　　UIImagePickerControllerSourceTypeSavedPhotosAlbum  // 相册
　　　　};
　　　　typedef NSUInteger UIImagePickerControllerSourceType;

　　2）allowsEditing属性：是否允许剪切

　　3）设置代理deleage

　　4)  mediaTypes属性：为UIImagePickerViewController指定媒体类型（数组），默认包含kUTTypeImage，所以拍照时可以不用设置，但是录像的时候必须设置，可以设置为kUTTypeVideo（不带声音）或者kUTTypeMovie（视频并带有声音）

　　　　设置媒体类型：

1 picker.mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeMovie, nil];

　　　　如果想包含所有媒体，可以使用下面方法：

1 picker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];

　　　　

　　　5)  videoQuality属性：视频质量，一个枚举类型。

1 enum{2         UIImagePickerControllerQualityTypeHigh            = 0,  //高清
3         UIImagePickerControllerQualityTypeMedium          = 1,  //default value
4         UIImagePickerControllerQualityTypeLow             = 2,  //低质量，适用于蜂窝网传输
5         UIImagePickerControllerQualityType640x480         = 3,6         UIImagePickerControllerQualityTypeIFrame1280x720  = 4,7         UIImagePickerControllerQualityTypeIFrame960x540   = 5
8 };9     typedef NSUInteger UIImagePickerControllerQualityType;

　　　6)  videoMaximumDuration属性：录制视频的最长时间，默认长度为10分钟。

　　　7） showsCameraControls属性：是否显示摄像头控制面板，默认为YES。

3、显示UIImagePickerController

　　[self presentViewController:self.pickerController animated:YES completion:nil];

4、实现代理函数

　　- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info

　　- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

　　如果实现了imagePickerControllerDidCancel函数，那么我们点击cancel按钮时，失效，所以我们要在这个函数里调用

　　[picker dismissViewControllerAnimated:YES completion:nil];

简单实现拍照、录像，并从相册中取照片和视频：

SJZPhotoViewController.h

1 #import <UIKit/UIKit.h>
2
3 @protocol SJZPhotoViewControllerDelegate <NSObject>
4
5 @optional6 - (void)getPhotoFromXiangce:(UIImage *)image;7 - (void)getVideoFromXiangce:(NSURL *)strURL;8 @end
9
10 @interfaceSJZPhotoViewController : UIViewController11
12 @property (nonatomic, weak) UIViewController *parentController;13 @property (nonatomic, weak) id<SJZPhotoViewControllerDelegate> delegate;14 @property (nonatomic, assign) CGFloat imageSale;15
16
17 - (void)addPhotoActionSheet;18 - (void)addVideoActionSheet;19 @end

SJZPhotoViewController.m

1 #import "SJZPhotoViewController.h"
2 #import <MobileCoreServices/UTCoreTypes.h>
3
4 @interface SJZPhotoViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
5
6 @end
7
8 @implementationSJZPhotoViewController9
10 - (void)viewDidLoad {11 [super viewDidLoad];12
13
14 }15
16 - (void)addVideoActionSheet17 {18     UIAlertController * alert =[UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];19
20     UIAlertAction * videoAction = [UIAlertAction actionWithTitle:@"录制视频" style:UIAlertActionStyleDefault handler:^(UIAlertAction *_Nonnull action) {21 [self actionsheetForVideofromXiangji];22 }];23 [alert addAction:videoAction];24
25     UIAlertAction * action = [UIAlertAction actionWithTitle:@"从相册选取" style:UIAlertActionStyleDefault handler:^(UIAlertAction *_Nonnull action) {26 [self aciontSheetForVideoFromXiangce];27 }];28
29 [alert addAction:action];30
31     UIAlertAction * cancleAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *_Nonnull action) {32
33 }];34 [alert addAction:cancleAction];35
36     [self.parentController presentViewController:alert animated:YES completion:^{37
38 }];39
40 }41
42 //从相册取视频
43 - (void)aciontSheetForVideoFromXiangce44 {45     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){46         UIImagePickerController * picker =[[UIImagePickerController alloc] init];47         picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;48         //设置媒体类型
49         picker.mediaTypes =[UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];50         picker.delegate =self;51
52         [self.parentController presentViewController:picker animated:YES completion:^{53
54 }];55 }56 }57
58 //录像
59 - (void)actionsheetForVideofromXiangji60 {61     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){62         //判断后置摄像头是否可用
63         if([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear]){64             UIImagePickerController * picker =[[UIImagePickerController alloc] init];65             picker.sourceType =UIImagePickerControllerSourceTypeCamera;66             picker.delegate =self;67
68             //设置媒体类型，需要包括视频媒体类型
69             picker.mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeMovie, nil];70
71             [self.parentController presentViewController:picker animated:YES completion:^{72
73 }];74 }75 }76 }77
78 - (void)addPhotoActionSheet79 {80     UIAlertController * alert =[UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];81
82     UIAlertAction * action = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction *_Nonnull action) {83 [self actionSheetForImageFromXiangji];84 }];85 [alert addAction:action];86
87     UIAlertAction * action1 = [UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction *_Nonnull action) {88 [self aciontSheetForImageFromXiangce];89 }];90 [alert addAction:action1];91
92     UIAlertAction * cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *_Nonnull action) {93
94 }];95 [alert addAction:cancelAction];96
97 [self.parentController presentViewController:alert animated:YES completion:nil];98 }99
100 //从相册区图片
101 - (void)aciontSheetForImageFromXiangce102 {103     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){104         UIImagePickerController * picker =[[UIImagePickerController alloc] init];105         picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;106         picker.delegate =self;107         [self.parentController presentViewController:picker animated:YES completion:^{108 }];109 }110 }111
112 //相机拍照
113 - (void)actionSheetForImageFromXiangji114 {115     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){116         UIImagePickerController * pick =[[UIImagePickerController alloc] init];117         pick.sourceType =UIImagePickerControllerSourceTypeCamera;118         pick.delegate =self;119
120         [self.parentController presentViewController:pick animated:YES completion:^{121 }];122 }123 }124
125 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info126 {127     NSString * meidaType =[info objectForKey:UIImagePickerControllerMediaType];128     if([meidaType isEqualToString:@"public.image"]){129         UIImage * image =[info objectForKey:UIImagePickerControllerOriginalImage];130         //在这里可以对图片进行处理(比如压缩)
131         if(self.imageSale > 0){132             NSData * photoData =UIImageJPEGRepresentation(image, self.imageSale);133             image =[UIImage imageWithData:photoData];134 }135
136         if([self.delegaterespondsToSelector:@selector(getPhotoFromXiangce:)]){137             [self.delegategetPhotoFromXiangce:image];138 }139     }else if([meidaType isEqualToString:(NSString *)kUTTypeMovie]){140         //获取视频文件的url
141         NSURL * mediaURL =[info objectForKey:UIImagePickerControllerMediaURL];142
143         if([self.delegaterespondsToSelector:@selector(getVideoFromXiangce:)]){144             [self.delegategetVideoFromXiangce:mediaURL];145 }146 }147
148 [self.parentController dismissViewControllerAnimated:YES completion:nil];149 }150
151 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker152 {153     [self.parentController dismissViewControllerAnimated:YES completion:^{154
155 }];156 }157
158 @end

demo地址：https://github.com/sjzlovecj/SJZPhotoView