1.準備好icon

動態(tài)修改的icon需要放在工程文件夾中，不能放在 Assets.xcassets里，但是正常的主icon還是可以放在Assets.xcassets的，若有多個尺寸一并放入即可。

image.png

2.配置info.plist

1. 在info.plist中添加Icon files（iOS 5）
2. 在 Icon files（iOS 5）內添加一個Key： CFBundleAlternateIcons ，類型為字典，
3. 在CFBundleAlternateIcons里配置我們所有需要動態(tài)修改的icon：鍵為icon的名稱，值為一個字典（這個字典里包含兩個鍵：CFBundleIconFiles，其值類型為Array，內容為icon的名稱；UIPrerenderedIcon，其值類型為bool，內容為NO，也可以不加此key）

如果是添加了多個尺寸icon，也要在這里分別配置

image.png

image.png

3.代碼設置

- (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(@"更換app圖標發(fā)生錯誤了 ： %@",error);
        }
    }];
}

調用：

[self changeAppIconWithName:@"normal"];

4.去除更換時的彈窗

#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.審核踩坑

上架后，蘋果拒絕認為是無效的二進制文件，郵件反饋如下

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中刪除Newstand