在使用 LeftBarItems 和 RightBarItems 时，我遇到了过多的 UIBarButtonItem 填充/间距（见下图）。UIBarButtonItems 上使用的图标不包含额外的填充。所以我想知道是什么原因造成的？
问问题
28304 次
6 回答
27
我使用它是为了删除第一项之前的空间。
但是，它不适用于诸如 之类的系统项之间UIBarButtonSystemItemAdd，仅适用于具有图像的 UIBarButtonItem 。
@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
像这样使用它：
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];
于 2013-09-21T13:42:44.357 回答
23
你可以移动图片
self.myBarButtonItem.imageInsets = UIEdgeInsetsMake(0, 25, 0, -25);
于 2014-10-20T15:41:38.807 回答
8
Apple 默默地增加了 UIBarButtonItems 的水平间距限制，遗憾的是，仍然没有添加任何 UIAppearance 方法来调整 UIBarButtonItems 的水平定位。
最好的解决方案（对我有用）是将 UIBarButtonItems 包装在 UIView 中，使用initWithCustomView:并调整该自定义视图的边界以获得所需的定位。这是有关如何执行此操作的一个很好的答案。
如果您想更进一步，您可以使用类方法在 UIBarButtonItem 上创建一个类别，该类方法返回您在整个应用程序中使用的栏按钮。这样，当您需要一个条形按钮时，您可以调用如下内容：
self.navigationItem.leftBarButtonItem = [UIBarButtonItem mySearchBarButtonItemWithTarget:self selector:@selector(search)];
于 2013-09-20T18:59:33.187 回答
7
iOS 7 导航栏上有两种按钮：带图片的按钮和带文本的按钮。我写了一个类来做到这一点。方法如下：
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
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
你的视图控制器.m：
带有图像的按钮示例：
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;
带有文本的按钮示例：
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。
于 2013-12-03T00:54:22.507 回答
2
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.
在这里您可以找到图片 Inset，使用top, bottom AND left，right您可以更改 Bar Item 的位置。
于 2015-12-06T10:30:37.923 回答
0
正如@Luda 评论的那样，解决方案是
self.myBarButtonItem.imageInsets = UIEdgeInsetsMake(0, 25, 0, -25);
但是，@andrrs 在这里也指出了一个问题，当 inset 很大时：命中区域。在这种情况下，我们必须实现一种设置HitTestEdgeInsets 的方法。下面是一个分类方法：
@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
于 2015-12-17T15:53:42.207 回答