iOS7过多的导航栏按钮填充

Question

使用LeftBarItems和RightBarItems时，我遇到过多的UIBarButtonItem填充/间距（见下图）。 UIBarButtonItems上使用的图标不包含额外的填充。所以我想知道造成这种情况的原因是什么？

Answer 1

我使用它来删除第一个项目之前的空间。

但是它在UIBarButtonSystemItemAdd之类的系统项之间不起作用，只有UIBarButtonItem才有图像。

@interface UIBarButtonItem (NegativeSpacer)
+(UIBarButtonItem*)negativeSpacerWithWidth:(NSInteger)width;
@end
@implementation UIBarButtonItem (NegativeSpacer)
+(UIBarButtonItem*)negativeSpacerWithWidth:(NSInteger)width {
    UIBarButtonItem *item = [[UIBarButtonItem alloc]
                             initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                             target:nil
                             action:nil];
    item.width = (width >= 0 ? -width : width);
    return item;
}
@end

---

像这样使用：

---

UIBarButtonItem *item0 = [UIBarButtonItem negativeSpacerWithWidth:13];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"sidebar.png"]
                                                          style:UIBarButtonItemStylePlain
                                                         target:vc
                                                         action:@selector(sideMenuAction:)];
NSArray* items = @[item0, item1];
[vc.navigationItem setLeftBarButtonItems:items animated:NO];
[vc.navigationItem setLeftItemsSupplementBackButton:YES];

Answer 2

您可以移动图像

self.myBarButtonItem.imageInsets = UIEdgeInsetsMake(0, 25, 0, -25);

Answer 3

Apple默默地增加了UIBarButtonItems的水平间距约束，遗憾的是，仍然没有添加任何UIAppearance方法来调整UIBarButtonItems的水平位置。

最好的解决方案（对我有用）是使用initWithCustomView:将UIBarButtonItem包装在UIView中，并调整该自定义视图的边界以获得所需的定位。 Here's a good answer on how to do this

如果您想更进一步，可以使用类方法在UIBarButtonItem上创建一个类别，该方法返回您在整个应用中使用的条形按钮。这样，当你需要一个条形按钮时，你可以调用类似的东西：

self.navigationItem.leftBarButtonItem = [UIBarButtonItem mySearchBarButtonItemWithTarget:self selector:@selector(search)];

Answer 4

iOS 7导航栏上有两种按钮：带图像的按钮和带文字的按钮。我写了一堂课来做。方法如下：

<强> GlobalUICommon.h：

@interface UIBarButtonItem(CustomUIOfONE)

+ (UIBarButtonItem*)barItemWithImage:(UIImage*)image highlightedImage:(UIImage*)highlightedImage xOffset:(NSInteger)xOffset target:(id)target action:(SEL)action;

+ (UIBarButtonItem*)barItemWithTitle:(NSString*)title xOffset:(NSInteger)xOffset target:(id)target action:(SEL)action;

@end

<强> GlobalUICommon.m：

@implementation UIBarButtonItem(CustomUIOfONE)

+ (UIBarButtonItem*)barItemWithImage:(UIImage*)image highlightedImage:(UIImage*)highlightedImage xOffset:(NSInteger)xOffset target:(id)target action:(SEL)action
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setFrame:CGRectMake(0, 0, image.size.width, image.size.height)];
    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
    [button setImage:image forState:UIControlStateNormal];
    [button setImage:highlightedImage forState:UIControlStateHighlighted];
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
        [button setImageEdgeInsets:UIEdgeInsetsMake(0, xOffset, 0, -xOffset)];
    }

    UIBarButtonItem *customUIBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
    return customUIBarButtonItem;
}

+ (UIBarButtonItem*)barItemWithTitle:(NSString*)title xOffset:(NSInteger)xOffset target:(id)target action:(SEL)action
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setTitle:title forState:UIControlStateNormal];
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [button setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
    [button.titleLabel setFont:[UIFont systemFontOfSize:15]];
    [button setFrame:CGRectMake(0, 0, [button.titleLabel.text sizeWithFont:button.titleLabel.font].width + 3, 24)];
    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
        [button setContentEdgeInsets:UIEdgeInsetsMake(0, xOffset, 0, -xOffset)];
    }

    UIBarButtonItem *customUIBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
    return customUIBarButtonItem;
}

@end

<强> YourViewController.m：

带图像的按钮示例：

UIBarButtonItem* leftButtomItem = [UIBarButtonItem barItemWithImage:[UIImage imageNamed:@"yourImage"]
                                                   highlightedImage:[UIImage imageNamed:@"yourImage"]
                                                            xOffset:-11
                                                             target:self
                                                             action:@selector(yourHandler)];
self.navigationItem.leftBarButtonItem = leftButtomItem;
UIBarButtonItem* rightButtonItem = [UIBarButtonItem barItemWithImage:[UIImage imageNamed:@"yourImage"]
                                                   highlightedImage:[UIImage imageNamed:@"yourImage"]
                                                            xOffset:11
                                                             target:self
                                                             action:@selector(yourHandler)];
self.navigationItem.rightBarButtonItem = rightButtonItem;

带文字的按钮示例：

self.navigationItem.leftBarButtonItem = [UIBarButtonItem barItemWithTitle:@"yourText" xOffset:-11 target:self action:@selector(yourHandler:)];
self.navigationItem.rightBarButtonItem = [UIBarButtonItem barItemWithTitle:@"yourText" xOffset:11 target:self action:@selector(yourHandler:)];

就是这样。

Answer 5

我通过使用storybord界面解决了这个问题。

1.选择Bar item。

2.选择Size Inspector。

在这里，您可以使用top，bottom和left，right找到图片插件，您可以更改条形图的位置。

Answer 6

正如@Luda评论，解决方案是

self.myBarButtonItem.imageInsets = UIEdgeInsetsMake(0, 25, 0, -25);

然而，当插入很大时，@ andrrs也指出了一个问题：命中区域。在这种情况下，我们必须实现setHitTestEdgeInsets的方法。以下是类别方法：

@implementation UIButton (Extensions)

@dynamic hitTestEdgeInsets;

static const NSString *KEY_HIT_TEST_EDGE_INSETS = @"HitTestEdgeInsets";

-(void)setHitTestEdgeInsets:(UIEdgeInsets)hitTestEdgeInsets {
    NSValue *value = [NSValue value:&hitTestEdgeInsets withObjCType:@encode(UIEdgeInsets)];
    objc_setAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(UIEdgeInsets)hitTestEdgeInsets {
    NSValue *value = objc_getAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS);
    if(value) {
        UIEdgeInsets edgeInsets; [value getValue:&edgeInsets]; return edgeInsets;
    }else {
        return UIEdgeInsetsZero;
    }
}

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
    if(UIEdgeInsetsEqualToEdgeInsets(self.hitTestEdgeInsets, UIEdgeInsetsZero) ||       !self.enabled || self.hidden) {
        return [super pointInside:point withEvent:event];
    }

    CGRect relativeFrame = self.bounds;
    CGRect hitFrame = UIEdgeInsetsInsetRect(relativeFrame, self.hitTestEdgeInsets);

    return CGRectContainsPoint(hitFrame, point);
}

@end