1. 根据需要在ViewController.h中定义成员变量
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px 'Heiti SC Light'; color: #008400}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400}p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2}span.s1 {font-variant-ligatures: no-common-ligatures; color: #78492a}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s4 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s5 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures; color: #000000}span.s6 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures}span.s7 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s8 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures}
#import
@interface ViewController : UIViewController
{
//登录界面的组成：
//用户名提示：输入框
//密码提示：密码输入框
//登录按钮
//注册按钮
//用户名提示Label
UILabel* _lbUserName;
//密码提示Label
UILabel* _lbPassword;
//用户名输入框
UITextField* _tfUserName;
//密码输入框
UITextField* _tfPassword;
//登录按钮
UIButton* _btlogin;
//注册按钮
UIButton* _btRegister;
}
@end
2. 在ViewController.m中的ViewDidLoad函数中实现
- 用户名标签
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #4f8187}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s3 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s4 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s5 {font-variant-ligatures: no-common-ligatures; color: #272ad8}span.s6 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s7 {font-variant-ligatures: no-common-ligatures; color: #d12f1b}
_lbUserName = [[UILabel alloc]init];
_lbUserName.frame=CGRectMake(20, 60, 80, 40);
_lbUserName.text = @"username";
_lbUserName.font=[UIFont systemFontOfSize:20];
lbUserName.textAlignment=NSTextAlignmentLeft;
- 用户名输入框
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures}span.s4 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s5 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s6 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s7 {font-variant-ligatures: no-common-ligatures; color: #272ad8}
//用户名输入框
_tfUserName=[[UITextField alloc]init];
_tfUserName.frame=CGRectMake(120, 60, 180, 40);
_tfUserName.placeholder=@"insert username";
_tfUserName.borderStyle=UITextBorderStyleRoundedRect;
- 密码标签
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px 'Heiti SC Light'; color: #008400}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures; color: #000000}span.s2 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures}span.s4 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s5 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s6 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s7 {font-variant-ligatures: no-common-ligatures; color: #272ad8}span.s8 {font-variant-ligatures: no-common-ligatures; color: #000000}
//用户名密码提示
_lbPassword=[[UILabel alloc]init];
_lbPassword.frame=CGRectMake(20, 140, 80, 40);
_lbPassword.text = @"password: ";
_lbPassword.font=[UIFont systemFontOfSize:20];
_lbPassword.textAlignment=NSTextAlignmentLeft;
- 密码输入框
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa}span.s1 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures}span.s4 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s5 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s6 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s7 {font-variant-ligatures: no-common-ligatures; color: #272ad8}span.s8 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}
//密码输入框
_tfPassword=[[UITextField alloc]init];
_tfPassword.frame=CGRectMake(120, 140, 180, 40);
_tfPassword.placeholder=@"insert password";
_tfPassword.borderStyle=UITextBorderStyleRoundedRect;
_tfPassword.secureTextEntry=YES;
- 注册和登录按钮
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}span.s1 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures}span.s4 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s5 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s6 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s7 {font-variant-ligatures: no-common-ligatures; color: #272ad8}span.s8 {font-variant-ligatures: no-common-ligatures; color: #d12f1b}span.s9 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}
//登录和注册btn创建
_btlogin = [UIButton buttonWithType:UIButtonTypeRoundedRect];
_btlogin.frame=CGRectMake(120, 300, 80, 40);
[_btlogin setTitle:@"login" forState:UIControlStateNormal];
[_btlogin addTarget:self action:@selector(pressLogin) forControlEvents:UIControlEventTouchUpInside];
_btRegister=[UIButton buttonWithType:UIButtonTypeRoundedRect];
_btRegister.frame=CGRectMake(200, 300, 80, 40);
[_btRegister setTitle:@"register" forState:UIControlStateNormal];
[_btRegister addTarget:self action:@selector(pressRegister) forControlEvents:UIControlEventTouchUpInside];
最后把以上视图都显示出来
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #4f8187}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}span.s1 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s2 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s3 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s4 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s5 {font-variant-ligatures: no-common-ligatures}span.s6 {font-variant-ligatures: no-common-ligatures; color: #4f8187}
[self.view addSubview:_btRegister];
[self.view addSubview:_btlogin];
[self.view addSubview:_tfPassword];
[self.view addSubview:_tfUserName];
[self.view addSubview:_lbPassword];
[self.view addSubview:_lbUserName];
3. 按钮触发事件的函数实现
- 登录事件函数
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px 'Heiti SC Light'; color: #008400}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s4 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s5 {font-variant-ligatures: no-common-ligatures; color: #d12f1b}span.s6 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures; color: #000000}span.s7 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s8 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s9 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures; color: #d12f1b}span.s10 {font-variant-ligatures: no-common-ligatures; color: #000000}
//登录事件函数。要判断用户名和密码是否正确
-(void)pressLogin
{
NSString* strName=@"micheal";
NSString* strPass=@"123456";
//获取输入框中的内容
NSString* strTextName = _tfUserName.text;
NSString* strTextPass = _tfPassword.text;
if ([strName isEqualToString:strTextName]&&[strPass isEqualToString:strTextPass]) {
NSLog(@"用户名密码正确");
UIAlertView* alView=[[UIAlertView alloc]initWithTitle:@"提示" message:@"验证成功，登陆成功" delegate:nil cancelButtonTitle:@"确认" otherButtonTitles: nil];
[alView show];
}
else
{
UIAlertView* alView1=[[UIAlertView alloc]initWithTitle:@"提示" message:@"用户名或密码错误" delegate:nil cancelButtonTitle:@"确认" otherButtonTitles:nil];
[alView1 show];
}
}
- 注册事件函数
暂缺
- 点击空白处收回虚拟键盘
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s3 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s4 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s5 {font-variant-ligatures: no-common-ligatures; color: #4f8187}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[_tfUserName resignFirstResponder];
[_tfPassword resignFirstResponder];
}