如何在ios5中定制uibarbuttonite

我想要定制uibarbuttonite，这是我的代码

在ios4.3中它可以工作，但在ios5中，它非常奇怪。 uibarbuttonite消失在视线之外，但是你点击它仍然有效果，因为它是透明的

我需要你的帮助，如何制作这个UIBarbuttonim的展示。谢谢

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(0, 0, 50, 30);
[btn setBackgroundImage:[UIImage imageNamed:@"btnRegister.png"] forState:UIControlStateNormal];
[btn setTitle:@"register" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btn addTarget:self action:@selector(registerClick:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithCustomView:btn];
self.navigationItem.rightBarButtonItem = item1;

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我的问题和这个类似。在我的情况下，按钮显示为“无启用”。当你把它放进去的时候，它仍然有效果。一个小的解决办法是改变按钮的颜色为白色，但我正在寻找更好的方法：）

我的代码是：

buttonImage = [UIImage imageNamed:@"top_icon_share.png"];
UIButton *buttonShare = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height)];
[buttonShare setBackgroundImage:buttonImage forState:UIControlStateNormal];
[buttonShare addTarget:self action:@selector(buttonSharePressed)
      forControlEvents:UIControlEventTouchUpInside];
[buttonShare setShowsTouchWhenHighlighted:YES];];
    UIBarButtonItem *buttonBarShare = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"top_icon_share.png"] style:UIBarButtonItemStylePlain target:self action:@selector(buttonSharePressed:)];

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关于iOS 5中的新自定义功能，这里有一个很棒的教程：

下面是该网站的一份代码副本，该代码涉及到UIBarbuttonims的定制，它非常不言自明：

UIImage *button30 = [[UIImage imageNamed:@"button_textured_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 5, 0, 5)];
UIImage *button24 = [[UIImage imageNamed:@"button_textured_24"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 5, 0, 5)];

[[UIBarButtonItem appearance] setBackgroundImage:button30 forState:UIControlStateNormal 
barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackgroundImage:button24 forState:UIControlStateNormal 
barMetrics:UIBarMetricsLandscapePhone];

[[UIBarButtonItem appearance] setTitleTextAttributes:
    [NSDictionary dictionaryWithObjectsAndKeys:
    [UIColor colorWithRed:220.0/255.0 green:104.0/255.0 blue:1.0/255.0 alpha:1.0], 
    UITextAttributeTextColor, 
    [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0], 
    UITextAttributeTextShadowColor, 
    [NSValue valueWithUIOffset:UIOffsetMake(0, 1)], 
    UITextAttributeTextShadowOffset, 
    [UIFont fontWithName:@"AmericanTypewriter" size:0.0], 
    UITextAttributeFont, 
    nil] 
forState:UIControlStateNormal];