textVleftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 8, 0)];
_nameTf.leftViewMode = UITextFieldViewModeAlways;
textVleftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 8, 0)];
_nameTf.leftViewMode = UITextFieldViewModeAlways;
https://www.jianshu.com/p/d12ec047ce52