有时候，我们需要在UITextField的头尾加入一些空白，如下图所示：
其中，黄色和红色部分代表空白。
实现起来，比较简单，只需要设置UITextField的leftView、leftViewMode和rightView、rightViewMode即可，代码如下：
假设现有UItextField * txtField；
UIView * rView =[[UIView alloc] initWithFrame:CGRectMake(txtField.frame.size.width - 10, 0, 10, txtField.frame.size.height)]; rView.backgroundColor = [UIColor redColor]; txtField.rightView = rView; txtField.rightViewMode = UITextFieldViewModeAlways;
UIView * view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, txtField.frame.size.height)]; view.backgroundColor = [UIColor yellowColor]; txtField.leftViewMode = UITextFieldViewModeAlways; txtField.leftView = view;
给UITextField设置头或尾空白,布布扣,bubuko.com
原文：http://www.cnblogs.com/benbenzhu/p/3796513.html