iOS 10.3中的备用图标:避免图标更改的通知对话框

Question

我正在使用这个新功能,当使用活动应用程序进行更改时,会显示一个通知对话框,说明该图标已被修改.如何禁用此对话框？

Answer 1

添加安德鲁的Swift 5 重写罗伯特的答案（因为我没有评论的声誉）。

对于默认图标，我们需要传递 nil，因此 iconName 应该是可选的。

func setApplicationIconName(_ iconName: String?) {
        if UIApplication.shared.responds(to: #selector(getter: UIApplication.supportsAlternateIcons)) && UIApplication.shared.supportsAlternateIcons {
            
            typealias setAlternateIconName = @convention(c) (NSObject, Selector, NSString?, @escaping (NSError) -> ()) -> ()
            
            let selectorString = "_setAlternateIconName:completionHandler:"
            
            let selector = NSSelectorFromString(selectorString)
            let imp = UIApplication.shared.method(for: selector)
            let method = unsafeBitCast(imp, to: setAlternateIconName.self)
            method(UIApplication.shared, selector, iconName as NSString?, { _ in })
        }
    }

Answer 2

用 Swift重写了Robert的答案。该应用程序也没有被拒绝。

func setApplicationIconName(_ iconName: String) {
        if UIApplication.shared.responds(to: #selector(getter: UIApplication.supportsAlternateIcons)) && UIApplication.shared.supportsAlternateIcons {
            
            typealias setAlternateIconName = @convention(c) (NSObject, Selector, NSString, @escaping (NSError) -> ()) -> ()
            
            let selectorString = "_setAlternateIconName:completionHandler:"
            
            let selector = NSSelectorFromString(selectorString)
            let imp = UIApplication.shared.method(for: selector)
            let method = unsafeBitCast(imp, to: setAlternateIconName.self)
            method(UIApplication.shared, selector, iconName as NSString, { _ in })
        }
    }

Answer 3

如果您不介意使用私有方法，则可以尝试以下代码。

- (void)lc_setAlternateIconName:(NSString*)iconName
{
    //anti apple private method call analyse
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(supportsAlternateIcons)] && 
        [[UIApplication sharedApplication] supportsAlternateIcons])
    {
        NSMutableString *selectorString = [[NSMutableString alloc] initWithCapacity:40];
        [selectorString appendString:@"_setAlternate"];
        [selectorString appendString:@"IconName:"];
        [selectorString appendString:@"completionHandler:"];

        SEL selector = NSSelectorFromString(selectorString);
        IMP imp = [[UIApplication sharedApplication] methodForSelector:selector];
        void (*func)(id, SEL, id, id) = (void *)imp;
        if (func)
        {
            func([UIApplication sharedApplication], selector, iconName, ^(NSError * _Nullable error) {});
        }
    }
}