Question

-(void)cameraAndPhotoAlbums{
    self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"title" delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:nil otherButtonTitles:@"Photo album",@"camera", nil];

    [self.actionSheet showInView:self.view];
}

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex==0) {
        UIImagePickerController * imagePicker = [[UIImagePickerController alloc]init];
        imagePicker.delegate = self;
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentViewController:imagePicker animated:YES completion:nil];
    } else if(buttonIndex==1) {
        UIImagePickerController * imagePicker = [[UIImagePickerController alloc]init];
        imagePicker.delegate = self;
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [self presentViewController:imagePicker animated:YES completion:nil];
    }
}

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

-(void)imagePickerControllerDidCancel:(id)picker{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

但是在相册选择的照片时只会执行取消但是完成不执行，试过这个项目随处写的都不行，我再打开一个项目可以去代理，一个伟大的上帝保存让我目瞪口呆..

Answer 1

以下是您要学习的示例代码：

<强> ViewController.h

@interface ViewController : UIViewController<UIImagePickerControllerDelegate>
{
    UIImagePickerController * imagePicker;
}

@property (strong, nonatomic) IBOutlet UIImageView *imageView;

- (IBAction)setImageToImageView:(UIButton *)sender;


@end

<强> ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    NSLog(@"%@",NSHomeDirectory());

    imagePicker = [[UIImagePickerController alloc]init];
    imagePicker.delegate = self;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


#pragma mark - Image Picker Delegate

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    NSLog(@"Image picked");


    self.imageView.image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];

    if (picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary)
    {
        NSData * data = UIImageJPEGRepresentation([info valueForKey:@"UIImagePickerControllerOriginalImage"], 0.5);

        NSString * path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/image.JPEG"];
        [data writeToFile:path atomically:true];

    }
    else
    {
        UIImageWriteToSavedPhotosAlbum([info valueForKey:@"UIImagePickerControllerOriginalImage"], nil, nil, nil);
    }

    [self dismissViewControllerAnimated:true completion:nil];

}

- (IBAction)setImageToImageView:(UIButton *)sender
{
    if (sender.tag == 101)
    {
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else
    {
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }

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

}
@end

此代码可以在设备上进行测试。

didFinishPickingMediaWithInfo不起作用

1 个答案: