view上面 长view时候要设置其frame的,

 picViewOriginX = 0;

     picViewOriginY = 0;

     picViewWidth = 320;

     picViewHeight = 60;

    picView.frame = CGRectMake(picViewOriginX, picViewOriginY, picViewWidth, picViewHeight);

320 - 300

原文地址:https://www.cnblogs.com/guligei/p/3490563.html