textfield 左侧添加图片或设置左边距

给textfield左侧添加图片，最终效果如图：

登陆注册.png

1.我们直接给文本框添加左视图

        UIImageView *image=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
        
        image.image = [UIImage imageNamed:@"image.png"];
        
        text.leftView=image;
        
        text.leftViewMode = UITextFieldViewModeAlways;

效果如下：

初步效果.png

我们发现图片片左上角，所以我在textfield先添加一个UIView，再在视图上添加一个UIImageView,上代码

        //文本框左视图
        UIView *leftView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 50, 52)];
        leftView.backgroundColor = [UIColor clearColor];
        //添加图片
        UIImageView *headView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 10, 30, 32)];
        headView.image = [UIImage imageNamed:@"lock"];
        [leftView addSubview:headView];
        
        _passwordTextField.leftView = leftView;
        _passwordTextField.leftViewMode = UITextFieldViewModeAlways;

So，就实现了最终的效果