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我被困了一段时间，因为它太奇怪了。我向用户展示了图像选择器，并在选择时使用图像作为按钮背景。问题是它仅在第二次选择图像后才起作用。不必是相同的图像。当前图像选择器选择图片，什么都没有。再次尝试相同或不同的图片，一切正常。代码如下，有人有什么建议吗？

-(void) changeProfileImage:(UIImage*) image {
    profilePhoto = image;

    [editPhotoButton setTitle:@"edit" forState:UIControlStateNormal];
    [editPhotoButton setBackgroundImage:profilePhoto forState:UIControlStateNormal];
    [editPhotoButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];    
}

(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *) imageInfo {
    UIImage* imageToUse;
    UIImage* editedTmpImage = [imageInfo objectForKey:@"UIImagePickerControllerEditedImage"];
    if (!editedTmpImage)
       imageToUse = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"];
       imageToUse = [imageToUse resizedImageWithContentMode:UIViewContentModeScaleAspectFill bounds:CGSizeMake(MIN(imageToUse.size.width,1024), MIN(imageToUse.size.width, 768)) interpolationQuality:kCGInterpolationHigh];

   [self changeProfileImage:imageToUse];
   [imagePicker dismissViewControllerAnimated:YES completion:Nil];
}
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2 回答 2

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这（是否可以在 UITableView 中刷新单个 UITableViewCell？）解决了问题！按照链接中的建议重新绘制销售。

于 2013-09-15T01:52:52.730 回答
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首先，只是为了确保，你能像这样把它清理一下，然后再试一次吗？

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *) imageInfo {
    UIImage* imageToUse = [imageInfo objectForKey:@"UIImagePickerControllerEditedImage"];
    if (!imageToUse) { // this part was confusing above, please use curvy-braces
       imageToUse = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"];
    }
    imageToUse = [imageToUse resizedImageWithContentMode:UIViewContentModeScaleAspectFill bounds:CGSizeMake(MIN(imageToUse.size.width,1024), MIN(imageToUse.size.width, 768)) interpolationQuality:kCGInterpolationHigh];

    [self changeProfileImage:imageToUse];
    [imagePicker dismissViewControllerAnimated:YES completion:nil];
}
于 2013-09-14T21:19:59.297 回答