上传头像（照相机、图片库）

#pragma mark - 上传头像

- (IBAction)btnUploadHeadClicked:(id)sender
{
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil, nil];
    [actionSheet addButtonWithTitle:@"拍照"];
    [actionSheet addButtonWithTitle:@"从手机相册选择"];
    // 同时添加一个取消按钮
    [actionSheet addButtonWithTitle:@"取消"];
    // 将取消按钮的index设置成我们刚添加的那个按钮，这样在delegate中就可以知道是那个按钮
    actionSheet.destructiveButtonIndex = actionSheet.numberOfButtons - 1;
    [actionSheet showInView:self.view];
    [actionSheet release];
}

#pragma mark - 判断设备是否有摄像头

- (BOOL) isCameraAvailable
{    
    return [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];    
}


#pragma mark - UIActionSheet delegate

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.editing = YES;
    imagePicker.allowsEditing = YES;
    imagePicker.delegate = self;
    
    if (buttonIndex == 0)//照相机
    {
        if ([self isCameraAvailable]) {
            imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
            [self presentModalViewController:imagePicker animated:YES];
        }else{
            [PublicMethod showMBProgressHUD:@"该设备没有摄像头" andWhereView:self.view hiddenTime:kHiddenTime];
        }
    }
    if (buttonIndex == 1)
    {        
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentModalViewController:imagePicker animated:YES];
    }
    if (buttonIndex == 2)
    {
        
    }
    [imagePicker release];
}

#pragma mark - UIImagePicker delegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissModalViewControllerAnimated:YES];
    UIImage *image = [[info objectForKey:UIImagePickerControllerEditedImage] retain];
    [self performSelector:@selector(saveImage:) withObject:image afterDelay:0.5];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissModalViewControllerAnimated:YES];
}

#pragma mark -

- (void)saveImage:(UIImage *)image
{
    imgVHead.image = image;
}

@end