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

Question

我试图将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:@"SR-rewards.jpg"]]已执行,但profileImageView.image.size.height为0.然后我给它另一个拍摄使用 [profileImageView performSelectorOnMainThread:@selector(setImage:) withObject: [UIImage imageNamed:@"SR-rewards.jpg"] waitUntilDone:YES]; 它来运行它主线程.虽然图像仍未显示,但profileImageView.image.size.height更改为277.

有什么想法的原因？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];

}

关心锤子

Answer 1

更新主队列中的UI.

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