iOS 获取图片（拍照，图库，相册）

标签：ios   摄像头   视频   图片   

iOS  获取图片有三种方法

1 直接调用摄像头拍照

2 从相册中选择

3 从图库中选择

UIImagePickerController 是系统提供的用来获取图片和视频的接口；

用UIImagePickerController 类来获取图片视频；

大体分为以下几个步骤：

1. 初始化UIImagePickerController 类
2. 设置UIImagePickerController 实例的数据来源类型（下面解释）；
3. 设置设置代理
4. 如果需要做图片修改的话设置allowsEditing =yes

enum {
   UIImagePickerControllerSourceTypePhotoLibrary ,//来自图库
   UIImagePickerControllerSourceTypeCamera ,//来自相机
   UIImagePickerControllerSourceTypeSavedPhotosAlbum //来自相册
};

在用这些来源的时候最好检测以下设备是否支持；

 if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
        NSLog(@"支持相机");
    }
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
    {
        NSLog(@"支持图库");
    }
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum])
    {
        NSLog(@"支持相片库");
    }

- (void)viewDidLoad {
    [super viewDidLoad];
    picker = [[UIImagePickerController alloc]init];
    picker.view.backgroundColor = [UIColor orangeColor];
    UIImagePickerControllerSourceType sourcheType = UIImagePickerControllerSourceTypeCamera;
    picker.sourceType = sourcheType;
    picker.delegate = self;
    picker.allowsEditing = YES;
}

[self presentViewController:picker animated:YES completion:nil];

UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;

选取的信息都在info中

info 是一个字典 

字典中得键

NSString *const  UIImagePickerControllerMediaType ;指定用户选择的媒体类型（文章最后进行扩展）
NSString *const  UIImagePickerControllerOriginalImage ;原始图片
NSString *const  UIImagePickerControllerEditedImage ;修改后的图片
NSString *const  UIImagePickerControllerCropRect ;裁剪尺寸
NSString *const  UIImagePickerControllerMediaURL ;媒体的URL
NSString *const  UIImagePickerControllerReferenceURL ;原件的URL
NSString *const  UIImagePickerControllerMediaMetadata;当来数据来源是照相机的时候这个值才有效

UIImagePickerController 的更多参数参考http://blog.sina.com.cn/s/blog_68edaff101019ppe.html

代理中得功能参考 http://bbs.9ria.com/forum.php?mod=viewthread&tid=244453

UIImagePickerControllerMediaType 包含着KUTTypeImage 和KUTTypeMovie

KUTTypeImage 包含

const CFStringRef  kUTTypeImage ;抽象的图片类型
const CFStringRef  kUTTypeJPEG ;
const CFStringRef  kUTTypeJPEG2000 ;
const CFStringRef  kUTTypeTIFF ;
const CFStringRef  kUTTypePICT ;
const CFStringRef  kUTTypeGIF ;
const CFStringRef  kUTTypePNG ;
const CFStringRef  kUTTypeQuickTimeImage ;
const CFStringRef  kUTTypeAppleICNS 
const CFStringRef kUTTypeBMP;
const CFStringRef  kUTTypeICO;

const CFStringRef  kUTTypeAudiovisualContent ;抽象的声音视频
const CFStringRef  kUTTypeMovie ;抽象的媒体格式（声音和视频）
const CFStringRef  kUTTypeVideo ;只有视频没有声音
const CFStringRef  kUTTypeAudio ;只有声音没有视频
const CFStringRef  kUTTypeQuickTimeMovie ;
const CFStringRef  kUTTypeMPEG ;
const CFStringRef  kUTTypeMPEG4 ;
const CFStringRef  kUTTypeMP3 ;
const CFStringRef  kUTTypeMPEG4Audio ;
const CFStringRef  kUTTypeAppleProtectedMPEG4Audio;

iOS 获取图片（拍照，图库，相册）

标签：ios   摄像头   视频   图片   

原文地址：http://blog.csdn.net/u010123208/article/details/39493535