UITextField文本框前面空白宽度设置以及后面组合按钮设置

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_txtAccount指的是你定义的UITextField

//给文本输入框后面加入空白

_txtAccount.rightView =_btnDropDown;

_txtAccount.rightViewMode=  UITextFieldViewModeAlways;

//给文本输入框前面加入空白

CGRectframe = [_txtAccount frame];

frame.size.width= 5;

UIView*leftview = [[UIView alloc] initWithFrame:frame];

_txtAccount.leftViewMode= UITextFieldViewModeAlways;

_txtAccount.leftView= leftview;