Question

我正在尝试将UIImageView的图像设置为下面的UIImagePickerController的返回。我的UIImageView profileImageView在viewdidload中实例化。奇怪的是，UIImagePickerController返回的图像尚未显示在profileImageView中。最初我认为这是图像问题，所以我把它修改为SR-rewards.jpg。添加NSLog，它显示[profileImageView setImage：[UIImage imageNamed：@＆＃34; SR-rewards.jpg＆＃34;]]已执行，但profileImageView.image.size.height为0。然后我用[profileImageView performSelectorOnMainThread:@selector(setImage:) withObject: [UIImage imageNamed:@"SR-rewards.jpg"] waitUntilDone:YES];给它另一个镜头在主线程中运行它。虽然，图像仍未显示，但profileImageView.image.size.height更改为277。

有什么想法吗？我该如何设置图像？

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

    UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
    [profileImageView setImage:[UIImage imageNamed:@"SR-rewards.jpg"]];//[self cropImage:smallImage];
    NSLog(@"%f" , profileImageView.image.size.height);
    [picker dismissViewControllerAnimated:YES completion:NULL];

}

此致锤

Answer 1

更新主队列中的UI。

dispatch_async(dispatch_get_main_queue(), ^{
    [profileImageView setImage:[UIImage imageNamed:@"SR-rewards.jpg"]];
});

imagePickerController设置UIImageView.image不会更改显示的图像

1 个答案: