******由于是初学者，很多代码都还没有优化.所以此代码仅供参考：
- (void)viewDidLoad {
[super viewDidLoad];
//导入背景色
//设定背景色的尺寸
self.ImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
//设置背景色图片
self.ImageView.image =[UIImage imageNamed:@"beijing.png"];
//添加背景色图片到父视图上
[self.view addSubview:self.ImageView];
//输入WELCOME
//定义lable的大小
self.labe1 = [[UILabel alloc] initWithFrame:CGRectMake((self.view.frame.size.width-200)/2, 30, 200, 50)];
//给lable1赋值
self.labe1.text = @"WELCOME";
self.labe1.font = [UIFont fontWithName:@"Symbol"size:1];
NSLog(@"%@",[UIFont familyNames]);
//让书签居中
self.labe1.textAlignment = NSTextAlignmentCenter;
self.labe1.shadowColor = [UIColor brownColor];
self.labe1.shadowOffset = CGSizeMake(5, 5);
//给书签设定背景色
self.labe1.textColor = [UIColor whiteColor];
//设定书签字体的大小
self.labe1.font = [UIFont systemFontOfSize:35 weight:5];
//显示书签
[self.view addSubview:self.labe1];
//导入用户名头像
//设置头像的位置
self.ImageView2 = [[UIImageView alloc] initWithFrame:CGRectMake((self.view.bounds.size.width-200)/2-30, 95,25,30)];
//导入头像
self.ImageView2.image = [UIImage imageNamed:@"phoneIcon@2x.png"];
//显示头像
[self.view addSubview:self.ImageView2];
//输入账号设置
self.field1 = [[UITextField alloc ]initWithFrame:CGRectMake((self.view.frame.size.width-200)/2, 90, 200, 40)];
//设置用户提示栏
self.field1.text =@"请输入手机号";
// 设置字体的颜色及透明度
self.field1.textColor = [UIColor colorWithWhite:1.0 alpha:0.5];
//显示用户栏
[self.view addSubview:self.field1];
//导入登陆白线
self.alable =[[UILabel alloc] initWithFrame:CGRectMake((self.view.bounds.size.width-200)/2-30, 132, 230, 1)];
//设置线的颜色
self.alable.backgroundColor =[UIColor whiteColor];
[self.view addSubview:self.alable];
//导入安全锁
self.ImageView3 = [[UIImageView alloc] initWithFrame:CGRectMake((self.view.bounds.size.width-200)/2-30, 140,25,30)];
//导入锁的图标
self.ImageView3.image = [UIImage imageNamed:@"passwordIcon@2x.png"];
//显示锁的图标
[self.view addSubview:self.ImageView3];
// 输入密码设置
self.field2 = [[UITextField alloc ]initWithFrame:CGRectMake((self.view.frame.size.width-200)/2, 135, 200, 40)];
self.field2.text =@"请输入密码";
// 设置字体的颜色及透明度
self.field2.textColor = [UIColor colorWithWhite:1.0 alpha:0.5];
[self.view addSubview:self.field2];
//导入注册白线
self.alable =[[UILabel alloc] initWithFrame:CGRectMake((self.view.bounds.size.width-200)/2-30, 176, 230, 1)];
self.alable.backgroundColor =[UIColor whiteColor];
[self.view addSubview:self.alable];
//登录按键设置
//设置登录按键的大小
self.button = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width-250)/2, 200, 250, 40)];
//按钮的圆角
self.button.layer.cornerRadius = 10;
//设置按钮的背景色
self.button.backgroundColor = [UIColor colorWithRed:0.3 green:0.6 blue:0.5 alpha:1.0];
// self.button.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"loginButton@2x.png"]];
//设置登录的提示字
[self.button setTitle:@"登录" forState:UIControlStateNormal];
//设置字体的大小
self.button.titleLabel.font = [UIFont systemFontOfSize:20 weight:2];
//显示登录按钮
[self.view addSubview:self.button];
//注册按键设置
self.button1 = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width-250)/2, 250, 250, 40)];
//设置按钮圆角
self.button1.layer.cornerRadius = 10;
//设置背景色
self.button1.backgroundColor = [UIColor whiteColor];
//设置注册的提示字
[self.button1 setTitle:@"注册" forState:UIControlStateNormal];
//设置字体的颜色
[self.button1 setTitleColor:[UIColor colorWithRed:0.3 green:0.6 blue:0.5 alpha:1.0] forState: UIControlStateNormal];
//设置字体的大小
self.button1.titleLabel.font = [UIFont systemFontOfSize:20 weight:1];
[self.view addSubview:self.button1];
//导入学啊网logo
self.ImageView1 = [[UIImageView alloc] initWithFrame:CGRectMake((self.view.bounds.size.width-80)/2, self.view.bounds.size.height-50,80,20)];
//导入logo@2x.png图片
self.ImageView1.image = [UIImage imageNamed:@"logo@2x.png"];
[self.view addSubview:self.ImageView1];
}