iPhone 第二天笔记2016年03月30日（周三）A.M 秒表计时、登录验证+页面跳转

1. 按钮代码实现：

 1 <font size="3">-(void)initbuttonregister
 2 {
 3     UIButton* btn = [UIButton buttonWithType:UIButtonTypeCustom];
 4     //设置frame
 5     [btn setFrame:CGRectMake(200, 230, 80, 44)];
 6     //设置title
 7     [btn setTitle:@"注册" forState:UIControlStateNormal];
 8     //参数一：标题 参数二：状态。
 9     [btn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
10     //关联方法：单击时，[self click]
11     [btn addTarget:self action:@selector(clickregister) forControlEvents:UIControlEventTouchUpInside];
12     //参数一：目标 参数二：动作 参数三：事件
13     //将btn作为self.view的子视图
14     [self.view addSubview:btn];
15 }
16 </font>

2. 标签代码实现：

 1 <font size="3">-(void)initlabelnotice{
 2
 3     UILabel* label = [[UILabel alloc] init];
 4     [label setFrame:CGRectMake(110, 90, 200, 30)];
 5     label.textAlignment = NSTextAlignmentLeft;
 6     label.text = @"用户登录";
 7     label.textColor = [UIColor blueColor];
 8     label.font = [UIFont systemFontOfSize:25];
 9
10     [self.view addSubview:label];
11 }</font>

3. 文本框代码实现：

 1 <font size="3">-(void)initfieldname  //文本框
 2 {
 3     self.fieldname = [[UITextField alloc] initWithFrame:CGRectMake(110, 160, 180, 23)];
 4     self.fieldname.placeholder = @"请输入用户名";//设置占位符
 5     self.fieldname.borderStyle = UITextBorderStyleLine;//设置文本框的边框
 6     self.fieldname.textColor = [UIColor blueColor];
 7     self.fieldname.font = [UIFont systemFontOfSize:16];
 8     [self.view addSubview:self.fieldname];
 9
10     self.fieldname.delegate = self;
11 }
12 </font>

4. 视图控制器切换

1 <font size="3">DetailViewController* detailviewctr = [[DetailViewController alloc] init];
2         [self presentViewController:detailviewctr animated:YES completion:nil];</font>

1 <font size="3">[self dismissViewControllerAnimated:YES completion:nil];</font>

5. 源码下载： 秒表  Login