UItextField

    passwordTextF.leftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 17, 30)];

    passwordTextF.leftViewMode = UITextFieldViewModeAlways;

    passwordTextF.font=textFont;

    passwordTextF.delegate=self;

    passwordTextF.textColor=TITLECOLOR;

    passwordTextF.tag=102;

    passwordTextF.secureTextEntry=YES;

    passwordTextF.clearsOnBeginEditing=YES;//再次编辑清空

    passwordTextF.keyboardType=UIKeyboardTypeDefault;//支持电子邮件键盘

    passwordTextF.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"LoginViewController_密码" attributes:@{NSForegroundColorAttributeName: TITLECOLOR,NSFontAttributeName:textFont}];