用UI简单的控件搭载一个简单的登录页面

******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];

}