我在使用LeftBarItems和RightBarItems时遇到了过多的UIBarButtonItem填充/间距(请参见下面的图像)。 UIBarButtonItems上使用的图标不包含额外的填充。所以我想知道是什么导致了这种情况?
我使用它来删除第一个项目之前的空格。
然而,它在系统项(例如 UIBarButtonSystemItemAdd
)之间不起作用,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
使用方法如下:
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];
[vc.navigationItem setLeftItemsSupplementBackButton:YES];
是不必要的。 - jAckOdEUIBarButtonItem *rightSpacer = [UIBarButtonItem negativeSpacerWithWidth:13];[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:rightItem,rightSpacer, nil]];
- jAckOdE你可以移动这张图片
self.myBarButtonItem.imageInsets = UIEdgeInsetsMake(0, 25, 0, -25);
initWithCustomView:
在UIView中包装您的UIBarButtonItems,并调整该自定义视图的边界以获得所需的定位。 这里有一个关于如何做到这一点的好答案。self.navigationItem.leftBarButtonItem = [UIBarButtonItem mySearchBarButtonItemWithTarget:self selector:@selector(search)];
iOS 7导航栏中有两种按钮:带图像的按钮和带文本的按钮。我编写了一个类来实现这个功能。以下是具体步骤:
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
YourViewController.m:
带图片的按钮示例:
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。
正如@Luda所评论的那样,解决方案是
self.myBarButtonItem.imageInsets = UIEdgeInsetsMake(0, 25, 0, -25);
然而,@andrrs 在插入很大时也指出了一个问题:命中区域。在这种情况下,我们必须实现一种设置 setHitTestEdgeInsets 的方法。以下是一个类别方法:
@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