iOS textField 光标右移

- (void)setTextFieldLeftView:(UITextField *)textField leftWidth:(CGFloat)leftWidth {

    CGRect frame = textField.frame;

    frame.size.width = leftWidth;

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

    textField.leftViewMode = UITextFieldViewModeAlways;

    textField.leftView = leftview;

}