如何使用 UIImagePickerController 将图像添加到推文? [英] How I can use a UIImagePickerController to add an image to a tweet?

问题描述

我是 iOS 开发的新手，所以我很困惑.我有一个 ViewController，在这个 ViewController 中有很多 UIButton.如何使用 addImage 打开选择器并将图像添加到推文中?PS:我正在使用故事板.

I'm new to iOS development so I'm confused. I have a ViewController, in this ViewController there are many UIButtons. How I can open the picker and add the image to the tweet using addImage? PS: I'm using Storyboard.

谢谢和抱歉我的英语... :)

Thanks and sorry for my english... :)

推荐答案

当按钮被按下时，你想要做的事情是:

when the button is pressed, you want to do something like:

  if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum]) {
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];        

    imagePicker.sourceType =  UIImagePickerControllerSourceTypeSavedPhotosAlbum;  

    imagePicker.delegate = self;

    [self presentModalViewController:imagePicker animated:YES];
  }

您需要实现委托方法.主要是:

you need to implement the delegate methods. the main one is:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

    NSData *imageData = UIImagePNGRepresentation(image);

    // do twitter stuff here....

    [self dismissModalViewControllerAnimated:YES];
}

有关更多信息，请参阅文档:http:///developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/CameraAndPhotoLib_TopicsForIOS/Articles/PickinganItemfromthePhotoLibrary.html#//apple_ref/doc/uid/TP40010408-​​SW1

for more information, see the docs: http://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/CameraAndPhotoLib_TopicsForIOS/Articles/PickinganItemfromthePhotoLibrary.html#//apple_ref/doc/uid/TP40010408-SW1

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