在任意UIView上显示Badge（兼容IOS6）

最新推荐文章于 2023-12-28 08:45:56 发布

原创最新推荐文章于 2023-12-28 08:45:56 发布 · 858 阅读

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本文提供了一种在iOS6上兼容显示Badge的方法，通过改变Badge的类名来解决苹果对Badge类名修改导致的问题。包括提供源码实现及去除和添加Badge的完整流程。

之前写过一篇文章在任意UIView上显示Badge，但IOS6上失败了，原来是苹果将Badge的类名改了，所以这里作下兼容，源码如下：
[plain]
- (UIView *)showBadgeValue:(NSString *)strBadgeValue
{
    UITabBar *tabBar = [[UITabBar alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
    UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:@"" image:nil tag:0];
    item.badgeValue = strBadgeValue;
    NSArray *array = [[NSArray alloc] initWithObjects:item, nil];
    tabBar.items = array;
    [item release];
    [array release];
    //寻找
    for (UIView *viewTab in tabBar.subviews) {
        for (UIView *subview in viewTab.subviews) {
            NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
            if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
                [strClassName isEqualToString:@"_UIBadgeView"]) {
                //从原视图上移除
                [subview removeFromSuperview];
                //
                [self addSubview:subview];
                subview.frame = CGRectMake(self.frame.size.width-subview.frame.size.width, 0,
                                           subview.frame.size.width, subview.frame.size.height);
                [tabBar release];
                return subview;
            }
        }
    }
    [tabBar release];
    return nil;
}

- (void)removeBadgeValue
{
    //
    for (UIView *subview in self.subviews) {
        NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
        if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
            [strClassName isEqualToString:@"_UIBadgeView"]) {
            [subview removeFromSuperview];
            break;
        }
    }
}