方法一,rightView
textField有一个属性叫做rightView,只要给rightView添加一个自定义的Button,监听点击事件即可
方法二,KVC
UIButton *button = [textField valueForKey:@"_clearButton"];
[button setImage:[UIImage imageNamed:@"icon_blueclear"] forState:UIControlStateNormal];
field.clearButtonMode = UITextFieldViewModeWhileEditing;
转原文地址
http://blog.youkuaiyun.com/qq_26359763/article/details/51159754