實作一個拍照的UIActionSheet

#pragma mark - Image capture

- (IBAction)takePicture:(UITapGestureRecognizer*)sender {

UIActionSheet *sheet;

sheet = [[UIActionSheet alloc] initWithTitle:@"Pick Photo"

delegate:self

  cancelButtonTitle:@"Cancel"

  destructiveButtonTitle:nil

  otherButtonTitles:@"Take Photo", @"Choose Photo", nil];

[sheet showInView:self.navigationController.view];

}

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

[picker dismissViewControllerAnimated:YES completion:nil];

}

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

[picker dismissViewControllerAnimated:YES completion:nil];

}

#pragma mark - UIActionSheet Delegate

- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {

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

imagePicker.delegate = self;

switch (buttonIndex) {

case 0: {

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

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

}

}

break;

case 1: {

imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

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

}

break;

default:

break;

}

}