Question

我不太清楚这里出了什么问题，因为我很困难，所以我真的很感激。这是我的imagePickerController

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
        [[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithLong:customphoto1] forKey:@"customphoto1count"];
        UIImage *button1Image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];


    pngData = UIImagePNGRepresentation(button1Image);
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"Button1image.png"]; //Add the file name
    [pngData writeToFile:filePath atomically:YES]; //Write the file
    [self dismissViewControllerAnimated:YES completion:NULL];
    pngData = [NSData dataWithContentsOfFile:filePath];
    UIImage *imageLoaded = [UIImage imageWithData:pngData];
    [_button1 setImage:imageLoaded forState:UIControlStateNormal];
    self.button1.clipsToBounds = YES;
    self.button1.layer.cornerRadius = (self.button1.frame.size.width / 16);//half of the width
    self.button1.layer.borderColor=[UIColor blackColor].CGColor;
    self.button1.layer.borderWidth=1.0f;
    [self dismissViewControllerAnimated:YES completion:NULL];
}

以上保存图片（据我所知），因为_button1正在阅读imageLoaded

当应用关闭并重新打开时，这就是调用按钮显示的内容，并应从我的NSData加载图片：

-(void)customButton1{
    if (customphoto1 == 1) {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
        NSString *filePath = [documentsPath stringByAppendingPathComponent:@"Button1image.png"]; //Add the file name
        [pngData writeToFile:filePath atomically:YES];
        pngData = [NSData dataWithContentsOfFile:filePath];
        UIImage *imageLoaded1 = [UIImage imageWithData:pngData];
        NSLog(@"%@", filePath);
//        UIImage *imageload1 = [UIImage imageWithData:[newManagedObject valueForKey:@"imagesone"]];
        [_button1 setImage:imageLoaded1 forState:UIControlStateNormal];

    }
    else {
        button1ImageName = @"addnew";
    }
}

为什么我的图片没有加载？非常感谢

Answer 1

试试这个：

-(void)customButton1{
    if (customphoto1 == 1) {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
        NSString *filePath = [documentsPath stringByAppendingPathComponent:@"Button1image.png"]; 
        UIImage *imageLoaded1 = [UIImage imagewithcontentsoffile:filePath];
        NSLog(@"%@", filePath);

        [_button1 setImage:imageLoaded1 forState:UIControlStateNormal];

    }
    else {
        button1ImageName = @"addnew";
    }
}

调试：检查要打印的文件路径是否正确。在 Finder＆gt;中打开此路径CMD + Shift + G 并粘贴路径（从路径中删除文件名，使用到文件夹级别）。然后检查该特定图像是否在该文件夹中可用。

同样在您的didFinishPickingMediaWithInfo方法中，您要调用dismissViewControllerAnimated方法两次，它应该是一次并且在方法结束时。

希望这有帮助

Answer 2

图片一直在保存并且一直正常加载 - 问题原来是按钮setImage功能

从ImagePickerController将图像保存到文件 - 无法加载图像

2 个答案: