此方法只适用于iOS10.3

// Pass nil to use the primary application icon. The completion handler will be invoked asynchronously on an arbitrary background queue; be sure to dispatch back to the main queue before doing any further UI work.

• (void)setAlternateIconName:(nullable NSString *)alternateIconName completionHandler:(nullable void (^)(NSError *_Nullable error))completionHandler NS_EXTENSION_UNAVAILABLE("Extensions may not have alternate icons") API_AVAILABLE(ios(10.3), tvos(10.2));

在info.plist中添加下面信息

    
     CFBundleIcons
    	
    		
     
      CFBundleAlternateIcons
     		
     			
      
       star
      			
      				
       
        CFBundleIconFiles
       				
       					
        
         star-29
        					
        
         star-20
        					
        
         star-40
        					
        
         star-60
        				
       				
       
        UIPrerenderedIcon
       				
       			
      		
     	
    复制代码

-(void)setIcon:(NSString *)iconName{//默认的icon，iconName =nil;    NSString *appiconName = [[UIApplication sharedApplication] alternateIconName];    NSLog(@"目前iconName %@",appiconName);        [[UIApplication sharedApplication]setAlternateIconName:iconName completionHandler:^(NSError * error){        NSLog(@"samli error %@",error);    }];}复制代码

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