Iphone 将图像添加到UIToolbar的UIBarButtonim

我正在尝试向UIBarButtonim添加一个必须在UIToolbar中使用的图像

我已经成功地读取了图像，甚至用UIImageView显示了它，但是当我将其添加到UIBarButtonim中，然后将该项添加到UIToolbar中时，工具栏只会替换一个“空白”空间，即我试图加载的图像的大小和形状

这就是我正在尝试的

UIImage *image = [UIImage imageNamed:@"6.png"];

//This is the UIImageView that I was using to display the image so that i know that it is being read from the path specified.  
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(0, 50, image.size.width, image.size.height);
[self.view addSubview:imageView];

UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
[button1 setImage:image forState:UIControlStateNormal];

//This is the first way that I was trying to accomplish the task but i just get a blank white space

//This is the Second way but with the same blank white result.
UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithCustomView:button2];

NSArray *items = [NSArray arrayWithObjects: systemItem1, nil];

//Adding array of buttons to toolbar
[toolBar setItems:items animated:NO];

//Adding the Toolbar to the view.
[self.view addSubview:toolBar];

非常感谢你的帮助

谢谢大家!

---

Shumais Ul Haq

除了您通常期望的UIKit内容之外，您可能需要明确地为按钮设置一个框架。也许这是你的问题

这是我为一个定制样式的后退按钮所写的，作为

uibarbuttoneim

的一个类别（但您可以从中获取所需的片段）

请注意，这是用于导航栏，而不是工具栏，但我认为机制是相同的，因为它也是一个

uibarbuttoneim

。对于

UIToolbar

，您只需在编译时使用IB即可

#define TEXT_MARGIN 8.0f
#define ARROW_MARGIN 12.0f
#define FONT_SIZE 13.0f
#define IMAGE_HEIGHT 31.0f

+(UIBarButtonItem*)arrowLeftWithText:(NSString*)txt target:(id)target action:(SEL)selector
{
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImage *img = [[UIImage imageNamed:@"arrow_left.png"]
        stretchableImageWithLeftCapWidth:15 topCapHeight:0];

    [btn addTarget:target action:selector forControlEvents:UIControlEventTouchDown];

    [btn setContentHorizontalAlignment:UIControlContentHorizontalAlignmentRight];
    [btn setContentEdgeInsets:UIEdgeInsetsMake(0.0f,0.0f,0.0f,TEXT_MARGIN)];
    [btn.titleLabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:FONT_SIZE]];
    [btn.titleLabel setShadowOffset:CGSizeMake(0.0f,-1.0f)];

    /**** this is the magic line ****/
    btn.frame = CGRectMake(0.0f,0.0f,
        [txt sizeWithFont:[btn.titleLabel font]].width+ARROW_MARGIN+TEXT_MARGIN,
        IMAGE_HEIGHT);

    [btn styleBarButtonForState:UIControlStateNormal withImage:img andText:txt];
    [btn styleBarButtonForState:UIControlStateDisabled withImage:img andText:txt];
    [btn styleBarButtonForState:UIControlStateHighlighted withImage:img andText:txt];
    [btn styleBarButtonForState:UIControlStateSelected withImage:img andText:txt];
    return [[[UIBarButtonItem alloc] initWithCustomView:btn] autorelease];
}

用法：

[UIBarButtonItem arrowLeftWithText:@"Back" target:self action:@selector(dismiss)];

---

谢谢MVD！！！是的，是框架！！我只是简单地添加了这行button2.frame=CGRectMake（0,0，image.size.width，image.size.height）；我花了很长时间才让它工作。我想我永远不会忘记按钮框的关系！！再次感谢！