代码中更改Icon图标---iOS笔记摘录

1. Info.plist

<key>CFBundleIcons</key>
<dict>
   <key>CFBundlePrimaryIcon</key>
   <dict>
       <key>CFBundleIconFiles</key>
       <array>
           <string>原AppIcon图标名</string>
       </array>
   </dict>
   <key>CFBundleAlternateIcons</key>
   <dict>
       <key>icon01</key>
       <dict>
           <key>CFBundleIconFiles</key>
           <array>
               <string>AppIcon图标名2</string>
           </array>
       </dict>
       <key>icon02</key>
       <dict>
           <key>CFBundleIconFiles</key>
           <array>
               <string>AppIcon图标名3</string>
           </array>
       </dict>
   </dict>
</dict>

2. 将所有AppIcon放入工程中（不要放在Assets.xcassets）

3. 代码

// 更换
if ([UIApplication sharedApplication].supportsAlternateIcons) {
       [[UIApplication sharedApplication] setAlternateIconName:图标名 completionHandler:^(NSError * _Nullable error) {
           if (!error) {
               NSLog(@"success:%@",图标名);
           }else{
               NSLog(@"error:%@",error);
           }
       }];
   } else {
       NSLog(@"不能更换icon");
       return;
   }
}

// 还原
if ([UIApplication sharedApplication].alternateIconName != nil) {  // 图标被替换过
       // 重置icon
       [[UIApplication sharedApplication] setAlternateIconName:nil completionHandler:^(NSError * _Nullable error) {
           if (!error) {
               NSLog(@"success");
           } else {
               NSLog(@"error:%@",error);
           }
       }];
   }