图片循环播放，类似手机淘宝iOS版，完美过渡效果
省市列表三级联动的PickerView，带有 确定，取消
1、输入位置，显示地图 2、输入位置，点击跳入，苹果地图，导航
打分评价的Demo，点击星星选择对应分数
进入首先定位，然后对给定的城市进行排序，汉字转拼音
类似segment的选择，和scrollView结合，
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