iOS开发之UITextField 左侧设置小图标 leftview

    pwdTextField.placeholder = @"请输入密码";
    UIImageView *imageViewPwd=[[UIImageView alloc]initWithFrame:CGRectMake(-20, 0, 32, 24)];
    imageViewPwd.image=[UIImage imageNamed:@"k_06"];
    pwdTextField.leftView=imageViewPwd;
    pwdTextField.leftViewMode=UITextFieldViewModeAlways; //此处用来设置leftview现实时机
    pwdTextFidld.borderStyle = UITextBorderStyleRoundedRect;

    pwdTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
    
    这里有个提醒,有些童鞋使用后,发现图片怎么特别的贴着边缘,这时候你要让美工这样切图(图片上下左右都留出空隙,这样就可以实现效果了,也不会贴着屏幕边边)