ios 动态更新桌面图标

1.准备好icon

动态修改的icon需要放在工程文件夹中，不能放在 Assets.xcassets里，但是正常的主icon还是可以放在Assets.xcassets的，若有多个尺寸一并放入即可。

image.png

2.配置info.plist

1. 在info.plist中添加Icon files（iOS 5）
2. 在 Icon files（iOS 5）内添加一个Key： CFBundleAlternateIcons ，类型为字典，
3. 在CFBundleAlternateIcons里配置我们所有需要动态修改的icon：键为icon的名称，值为一个字典（这个字典里包含两个键：CFBundleIconFiles，其值类型为Array，内容为icon的名称；UIPrerenderedIcon，其值类型为bool，内容为NO，也可以不加此key）

如果是添加了多个尺寸icon，也要在这里分别配置

info.plist: image.png source code： image.png

3.代码设置

- (void)changeAppIconWithName:(NSString *)iconName {
    if (![[UIApplication sharedApplication] supportsAlternateIcons]) {
        return;
    }
    if ([iconName isEqualToString:@""]) {
        iconName = nil;
    }
    [[UIApplication sharedApplication] setAlternateIconName:iconName completionHandler:^(NSError * _Nullable error) {
        if (error) {
            NSLog(@"更换app图标发生错误了 ： %@",error);
        }
    }];
}

调用：

[self changeAppIconWithName:@"normal"];

4.去除更换时的弹窗

#import <UIKit/UIKit.h>
@interface UIViewController (ChangeAppIcon)
@end

#import "UIViewController+ChangeAppIcon.h"
#import <objc/runtime.h>

@implementation UIViewController (ChangeAppIcon)
+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Method presentM = class_getInstanceMethod(self.class, @selector(presentViewController:animated:completion:));
        Method presentSwizzlingM = class_getInstanceMethod(self.class, @selector(lq_presentViewController:animated:completion:));
        
        method_exchangeImplementations(presentM, presentSwizzlingM);
    });
}

- (void)lq_presentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion {
    if ([viewControllerToPresent isKindOfClass:[UIAlertController class]]) {
//        NSLog(@"title : %@",((UIAlertController *)viewControllerToPresent).title);
//        NSLog(@"message : %@",((UIAlertController *)viewControllerToPresent).message);
        UIAlertController *alertController = (UIAlertController *)viewControllerToPresent;
        if (alertController.title == nil && alertController.message == nil) {
            return;
        }
    }
    [self lq_presentViewController:viewControllerToPresent animated:flag completion:completion];
}
@end

5.审核踩坑

上架后，苹果拒绝认为是无效的二进制文件，邮件反馈如下

ITMS-90138: Your Info.plist contains the UINewsstandIcon sub-property under CFBundleIcons, which is intended for use with Newstand features. To include Newsstand features, the Info.plist must include the UINewsstandApp=true Info.plist key.

在info.plist中删除Newstand