fix: ios真机中，只要radius设置的不是默认值，更新则会闪烁问题（jdf2e#2481）

src/packages/__VUE/circleprogress/index.taro.vue

@@ -10,6 +10,7 @@
 </template>
 
 <script lang="ts">
+import Taro from '@tarojs/taro';
 import { computed, ref, watch, PropType } from 'vue';
 import { createComponent } from '@/packages/utils/create';
 import { CircleProgressStrokeLinecap } from './types';
@@ -50,6 +51,7 @@ export default create({
     }
   },
   setup(props) {
+    const isIos = Taro.getSystemInfoSync().platform === 'ios';
     const currentRate = ref(props.progress);
     const refRandomId = Math.random().toString(36).slice(-8);
     const isObject = (val: unknown): val is Record<any, any> => val !== null && typeof val === 'object';
@@ -105,7 +107,7 @@ export default create({
         background: `url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100'  xmlns='http://www.w3.org/2000/svg'%3E${pa}${path}${path1}%3C/svg%3E")`,
         width: '100%',
         height: '100%',
-        transition: ' background-image .3s ease 0s,stroke .3s ease 0s'
+        transition: `${isIos ? '' : 'background-image .3s ease 0s, '}stroke .3s ease 0s`
       };
     });
     const format = (progress: string | number) => Math.min(Math.max(+progress, 0), 100);