1.相機的調用

• 要打開系統(tǒng)的相機要在調用相冊的類里循序兩個協(xié)議剿另，分別是UIImagePickerControllerDelegate 和 UINavigationControllerDelegate耳峦。首先要有一個全局的UIImagePickerController變量類，主要是通過重寫它的setter方法設置這個類的的成員變量或者是屬性值才避，然后執(zhí)行這兩個協(xié)議的回調方法，主要的回調方法有三個，拍照時回調方法捺宗，拍照取消是的回調方法对蒲，將在下面得到簡單的體現(xiàn)钩蚊。

@interface HHMyMessageViewController () <UITableViewDelegate,UITableViewDataSource,UIImagePickerControllerDelegate,UINavigationControllerDelegate> 
/**
 *  切換到相機的管理器
 */
@property (nonatomic,strong) UIImagePickerController *imagePicker;
/**
 *   照片展示視圖
 */
@property (nonatomic,strong) UIImageView *_headImage;
@end
@implementation HHMyMessageViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setMessageOfPersonal];
}
- (void)setMessageOfPersonal {
_headImage = [[UIImageView alloc] init];
    UIButton *takeButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.view addSubview:takeButton];
    [takeButton addTarget:self action:@selector(takeClick:) forControlEvents:UIControlEventTouchDown];
}
/**
 *  拍照的回調方法
 *
 *  @param sender 點擊按鈕
 */
- (void)takeClick:(UIButton *)sender {
    [self presentViewController:self.imagePicker animated:YES completion:nil];
}

#pragma mark - UIImagePickerController代理方法
// 完成拍照后的回調方法
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    NSString *mediaType=[info objectForKey:UIImagePickerControllerMediaType];
     // 如果是拍照
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        UIImage *image;
        // 如果允許編輯則獲得編輯后的照片，否則獲取原始照片
        if (self.imagePicker.allowsEditing) {
            // 獲取編輯后的照片
            image = [info objectForKey:UIImagePickerControllerEditedImage];
        }
        else{
            // 獲取原始照片
            image = [info objectForKey:UIImagePickerControllerOriginalImage];
        }
        NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
        [def setObject:data1 forKey:@"headimage"];
        [def synchronize];
        // 顯示照片
        _headImage.image = [UIImage imageWithData:data1];
        if (image) {
            self.myImage(image);
        }
        // 保存到相簿
//        UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
    }
    [self dismissViewControllerAnimated:YES completion:nil];
}

/**
 *  點擊相冊取消按鈕的回調方法
 *
 *  @param picker 取消按鈕
 */
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    
    [self.imagePicker dismissViewControllerAnimated:YES completion:nil];
}

#pragma mark - 重寫imagePicker的geter方法
- (UIImagePickerController *)imagePicker{
    if (!_imagePicker) {
        _imagePicker = [[UIImagePickerController alloc]init];
        // 判斷現(xiàn)在可以獲得多媒體的方式
        if ([UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera]) {
            // 設置image picker的來源蹈矮，這里設置為攝像頭
            _imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
            // 設置使用哪個攝像頭砰逻，這里默認設置為前置攝像頭
            _imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
            if (self.isVideo) {
                _imagePicker.mediaTypes = @[(NSString *)kUTTypeMovie];
                _imagePicker.videoQuality = UIImagePickerControllerQualityTypeIFrame1280x720;
                // 設置攝像頭模式（拍照，錄制視頻）
                _imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
            }
            else{
                // 設置攝像頭模式為照相
                _imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
            }
        }
        else {
            _imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        }
        // 允許編輯
        _imagePicker.allowsEditing=YES;
        // 設置代理泛鸟，檢測操作
        _imagePicker.delegate=self;
    }
    return _imagePicker;
}