UIToolbar的UIBarButtonItem既形象和标题具有非常暗淡文本(UIToolbar

我的iPhone视图增加了一些自定义按钮，它的工具栏。 每个按钮同时具有图像和文本标题，并且这样产生：

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

标题的文本显示非常暗淡; 它看起来像它具有约0.5的α。 如果我使用默认的UIToolBar barStyle，我无法阅读文字的。 当使用UIBarStyleBlack我可以阅读文本，但它仍然看起来非常暗淡。

我也试过initWithTitle，然后设置图像属性; 结果是相同的。

有没有办法照亮的文本？ 我希望类似中的UITabBar一样，其项目既具有图像和标题看看。

谢谢您的帮助！

Answer 1:

我试图使用的UIBarButtonItem同时显示图像和按钮，但我敢肯定它的锁定，以显示一种或另一种。 从使用的基本思想这个主题 ，我想出了用一个UIButton和背景图像的解决方案。 我干了什么，最大的缺陷是，当标题文本的大小差异很大，背景图像拉伸使圆角看起来有点过。

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

#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

用法示例：

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

我对按钮的背景图像：

Answer 2:

Johnus的解决方案是非常有用的。 不过，我已经尝试过了，一个小问题发生： 动作未发送到栏按钮的项目 ，所以我修改了初始化一点：

- (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;
        // I've added just one line of code here
        [barButton addTarget:target
                      action:action
            forControlEvents:UIControlEventTouchUpInside];
    }

    return self;
}

Answer 3:

这里的答案是好的，但其往往更容易一些可用的组合物 ，而不是继承与UIKit类。

创建像这样一个栏项目：

_accountBarItem =
    [[UIBarButtonItem alloc] initWithCustomView:[CustomerBarView buttonWithImage:
    [UIImage imageNamed:@"Account.png"] text:@"Account"]];
[_accountBarItem setTarget:self];
[_accountBarItem setAction:@selector(accountButtonPressed)];

的自定义视图与图像和标签实现

@implementation CustomBarView

+ (instancetype)buttonWithImage:(UIImage*)image text:(NSString*)text
{
    CustomBarView* button = [[CustomBarView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
    [button setText:text];
    [button setImage:image];
    return button;
}


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        _uiButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [self addSubview:_uiButton];

        _label = [[UILabel alloc] initWithFrame:CGRectZero];
        [_label setTextColor:[UIColor whiteColor]];
        [_label setFont:[UIFont boldApplicationFontOfSize:9]];
        [_label setBackgroundColor:[UIColor clearColor]];
        [_label setTextAlignment:NSTextAlignmentCenter];
        [self addSubview:_label];
    }
    return self;
}


- (void)setText:(NSString*)text
{
    [_label setText:text];
}

- (void)setImage:(UIImage*)image
{
    [_uiButton setImage:image forState:UIControlStateNormal];
}




- (void)layoutSubviews
{
    [super layoutSubviews];
    [_uiButton setFrame:self.bounds];
    [_label setFrame:CGRectMake(2, self.height - 13, self.width - 4, 15)];
}

@end

文章来源: UIToolbar UIBarButtonItem with both image and title has very dim text