有关textField左视图leftView和书写位置的设置

   //设置书写位置

   [_PWtextFieldsetValue:[NSNumbernumberWithInt:30]forKey:@"paddingLeft"];

    

   // 左视图

    UIView *view1=[[UIViewalloc]initWithFrame:CGRectMake(-20,10, 20,20)];

    UIImageView *nameImage1=[[UIImageViewalloc]initWithFrame:CGRectMake(20,0, 20,20)];

    nameImage1.image=[UIImageimageNamed:@"3"];

    [view1 addSubview:nameImage1];

    _PWtextField.leftView=view1;

    _PWtextField.leftViewMode=UITextFieldViewModeAlways;

    _PWtextField.contentVerticalAlignment=UIControlContentVerticalAlignmentCenter;