iOS UIBarButtonItem UIEdgeInsetsMake不影响右/左的大小

Question

我正在尝试缩小一个按钮，使用UIEdgeInsetsMake创建一个图像。它似乎在顶部/底部工作，并垂直缩小图像，但右/左似乎没有任何影响。

这是我如何创造的形象，并试图使它更小。知道我哪里出问题了吗？

    NSString *path = [NSString stringWithFormat: @"https://s3.amazonaws.com/ios/images/remove-symbol-white.png"];
    NSURL *url = [NSURL URLWithString:path];
    NSData *data = [NSData dataWithContentsOfURL:url];
    UIImage *homeButton = [[UIImage alloc] initWithData:data];


    //TODO: Check image exists
    self.doneButton = [[UIBarButtonItem alloc] initWithImage:[homeButton imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]
                                                                style:UIBarButtonItemStylePlain
                                                               target:self
                                                               action: @selector(doneButtonPushed:)];
    self.doneButton.imageInsets = UIEdgeInsetsMake(12, 12, 12, 12);

Answer 1

您可以自定义视图的大小以初始化UIBarButtonItem，如下所示：

UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:imageView];，以便您可以设置所需的UIImageView大小。

Answer 2

从上面的答案出发，我用以下方法解决了这个问题：

    NSString *path = [NSString stringWithFormat: @"https://s3.amazonaws.com/ios/images/remove-symbol-white.png"];
    NSURL *url = [NSURL URLWithString:path];
    NSData *data = [NSData dataWithContentsOfURL:url];
    UIImage *homeButton = [[UIImage alloc] initWithData:data];

    UIImageView *imageView = [[UIImageView alloc] initWithImage:[homeButton imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    imageView.frame = CGRectMake(0, 0, 20, 20);

    self.doneButton = [[UIBarButtonItem alloc] initWithCustomView:imageView];