iOS学习用代码写界面，不用ib

刚刚开始学习iphone的东西，boss说要用纯代码写界面，那个纠结！

平台：xcode4.1

工程：iphone  viewbased

在loadview中写

- (void) loadView{
    [super loadView];
    UIView *contentView = [[UIView alloc]initWithFrame: [[UIScreen mainScreen] applicationFrame]];
    contentView.backgroundColor = [UIColor lightGrayColor];
    self.view = contentView;
    [contentView release];
    
    //label
    UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(0.0, 0.0, 320, 30)];
    label.text = @"PureCode";
    label.center = contentView.center;
    label.backgroundColor = [UIColor lightGrayColor];
    label.textAlignment = UITextAlignmentCenter;
    [self.view addSubview:label];
    [label release];
 
    //button
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button setFrame:CGRectMake(10.0, 20.0, 77, 37)];
    [button setTitle:@"Button" forState:UIControlStateNormal];
    [button setTitle:@"ok" forState:UIControlStateDisabled];
    [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

}

按钮事件，在viewcontroller.h中：

- (void) buttonPressed:(id)sender;

相应的在.m文件中：

 - (void)buttonPressed:(id)sender{
   UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"ButtonPressed"
                                    message:@"You have pressed the button"
                                    delegate:nil
                                    cancelButtonTitle:@"Yesh"
                                    otherButtonTitles: nil];
    [alert show]; 
} 

上图：

可以增加其它控件：

//image

    UIImage *image = [UIImage imageNamed:@"raw.png"];

    UIImageView  *imageView = [[UIImageView alloc]initWithImage:image];

    [imageView setFrame:CGRectMake(100, 100, 157, 57)];

    [imageView sizeToFit];

    imageView.backgroundColor = [UIColor blueColor];

    [self.view addSubview:imageView];

     

    [imageView release];