iOS相机与相册的调用常用代码

相机相册的调用其实很简单，和把大象关进冰箱一样正常的复制以下几步代码就好

1.首先添加代理和需要的全局对象

@interface MineChangesViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIActionSheetDelegate>{
    UIActionSheet *_sheet_HeadImg;//头像sheet
}

2.建立一个UIActionSheet（根据自己需求）让用户选择相机拍照或者调用相册

#pragma mark sheet 
- (void)headImgBtnDown{
    _sheet_HeadImg = [[UIActionSheet alloc]
                      initWithTitle:@"我要～"
                      delegate:self
                      cancelButtonTitle:@"取消"
                      destructiveButtonTitle:nil
                      otherButtonTitles:@"拍照",@"相册", nil];
    [_sheet_HeadImg showInView:self.view];
}

3.复制粘贴UIActionSheet的代理方法

- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if([actionSheet isEqual:_sheet_HeadImg]){
        switch (buttonIndex) {
            case 0:
            {//相机
                UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
                if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
                {
                    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
                    picker.delegate = self;
                    //设置拍照后的图片可被编辑
                    picker.allowsEditing = YES;
                    picker.sourceType = sourceType;
                    [self presentModalViewController:picker animated:YES];
                }else
                {
                    NSLog(@"模拟其中无法打开照相机,请在真机中使用");
                    NSLog(@"%@",[[NSBundle mainBundle] bundleIdentifier]);
                }
                break;
            }
            case 1:
            {//相册，直接使用我们的imagepickercontroller去相册里选一张图回来
                UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
                UIImagePickerController *ff = [[UIImagePickerController alloc] init];
                ff.delegate = self;
                ff.allowsEditing = YES;
                ff.sourceType = sourceType;
                ff.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                [self presentViewController:ff animated:YES completion:nil];
                break;
            }
                        default:
                break;
        }
    }
}

4.复制黏贴相机的代理方法

#pragma mark - UIImagePickerControllerDelegate 代理方法

// 当得到照片或者视频后，调用该方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    UIImage *theImage = nil;
    //    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    //    if ([mediaType isEqualToString:( NSString *)kUTTypeImage]){
    if ([picker allowsEditing]){
        theImage = [info objectForKey:UIImagePickerControllerEditedImage];
    } else {
        theImage = [info objectForKey:UIImagePickerControllerOriginalImage];
    }
    //    }
    [picker dismissViewControllerAnimated:YES completion:^{
        //这里写得到照片后的操作(比如替换头像，或者传到服务器的UIImage都是他)--theImage
    }];
}
// 当用户取消时，调用该方法
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [picker dismissViewControllerAnimated:YES completion:^{
    }];
}

然后就没啦~ 

你比你想象的更加强大，如果有写错的地方欢迎留言告诉我哦~

感谢观看，学以致用更感谢！