具有图像和标题的UIToolbar UIBarButtonItem具有非常暗淡的文本 [英] UIToolbar UIBarButtonItem with both image and title has very dim text

问题描述

我的iPhone视图在其工具栏中添加了一些自定义按钮。每个按钮都有一个图像和文本标题，并按如下方式创建：

My iPhone view adds some custom buttons to its toolbar. Each button has both an image and textual title, and is created like this:

UIBarButtonItem *fooButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"foo.png"] style:UIBarButtonItemStylePlain target:self action:@selector(fooButtonPressed:)];
fooButton.title=@"Foo";

标题的文字显得很暗;看起来它的alpha值约为0.5。如果我使用默认的UIToolBar barStyle，我根本无法读取文本。当使用UIBarStyleBlack时，我可以读取文本，但它看起来仍然很暗。

The title's text displays very dim; it looks like it has an alpha of about 0.5. If I use the default UIToolBar barStyle, I can't read the text at all. When using UIBarStyleBlack I can read the text but it still looks very dim.

我也试过initWithTitle，然后设置了image属性;结果是一样的。

I also tried initWithTitle, and then set the image property; the results are identical.

有没有办法照亮文字？我希望看起来类似于UITabBar，其项目同时具有图像和标题。

Is there a way to brighten up the text? I am hoping for a look similar to a UITabBar whose items have both an image and title.

感谢您的帮助！

推荐答案

我试图使用UIBarButtonItem来显示图像和按钮，但我很确定它被锁定以显示一个或另一个。使用此主题的基本思想想出了一个使用UIButton和背景图像的解决方案。我所做的最大缺陷是，当标题文字的大小变化很大时，背景图像会拉伸，导致圆角略微偏离。

I was trying to use the UIBarButtonItem to display both an image and a button, but I'm pretty sure it's locked down to display one or the other. Using the basic idea from this thread I came up with a solution using a UIButton and a background image. The biggest flaw of what I've done is that when the title text varies in size a lot, the background image stretches causing the rounded corners to look a little off.

CustomBarButtonItem.h

CustomBarButtonItem.h

#import <UIKit/UIKit.h>


@interface CustomBarButtonItem : UIBarButtonItem {}

- (id) initWithImage:(UIImage *)image title:(NSString *)title target:(id)target action:(SEL)action;

@end


@interface UIBarButtonItem (CustomBarButtonItem)

+ (UIBarButtonItem *) barButtonItemWithImage:(UIImage *)image title:(NSString *)title target:(id)target action:(SEL)action;

@end

CustomBarButtonItem.m

CustomBarButtonItem.m

#import "CustomBarButtonItem.h"


@implementation CustomBarButtonItem

- (id) initWithImage:(UIImage *)image title:(NSString *)title target:(id)target action:(SEL)action {

    UIButton *barButton = [UIButton buttonWithType:UIButtonTypeCustom];
    UIFont *font = [UIFont boldSystemFontOfSize:13];
    barButton.titleLabel.font = font;
    barButton.titleLabel.shadowOffset = CGSizeMake(0, -1);
    barButton.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 5);
    [barButton setImage:image forState:UIControlStateNormal];
    [barButton setTitle:title forState:UIControlStateNormal];
    [barButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [barButton setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
    [barButton setTitleShadowColor:[[UIColor blackColor] colorWithAlphaComponent:0.5] forState:UIControlStateNormal];
    [barButton setBackgroundImage:[UIImage imageNamed:@"bar-button-item-background.png"] forState:UIControlStateNormal];
    barButton.frame = CGRectMake(0, 0, image.size.width + 15 + [title sizeWithFont:font].width, 30);

    if (self = [super initWithCustomView:barButton]) {
        self.target = target;
        self.action = action;
    }

    return self;
}

@end


@implementation UIBarButtonItem (CustomBarButtonItem)

+ (UIBarButtonItem *) barButtonItemWithImage:(UIImage *)image title:(NSString *)title target:(id)target action:(SEL)action {
    return [[[CustomBarButtonItem alloc] initWithImage:image title:title target:target action:action] autorelease];
}

@end

样本用法：

UIBarButtonItem *customButtonItem = [UIBarButtonItem barButtonItemWithImage:[UIImage imageNamed:@"calendar.png"] title:@"Add to calendar" target:self action:@selector(addToCalendar)];

按钮的背景图片是：

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