ios学习笔记（二）xcode 4.3.2下实现基本交互

想必大家都阅读过iphone4与ipad2开发基础教程吧，这本书的xcode与现在的最新版本有些区别，去掉了view base application,只有比较接近的single view application.

首先我们创建一个single view application，注意这里我们不用自动引用计数。

接着我们点击工程列表中的MainStoryboard_iphone.storyboard 来编辑界面：

我们创建两个按钮和一个用来输出的空白文本：

目录结构与视图结构：

2.接着我们写代码来用来与IB界面编辑器来进行连接：在这里我们可以认为IBOutlet是与IB交互的输出，而IBAction则是IB交互的事件。

先编写ViewContoller.h:

  
 
 
#import <UIKit/UIKit.h>  
@interface ViewController : UIViewController 
{ 
} 
@property (nonatomic,retain) IBOutlet UILabel * statusText; 
-(IBAction)buttonPressed:(id)sender; 
@end 
#import <UIKit/UIKit.h> @interface ViewController : UIViewController { } @property (nonatomic,retain) IBOutlet UILabel * statusText; -(IBAction)buttonPressed:(id)sender; @end
接着在ViewContoller.m来实现功能：
 
 
 
 
 
#import "ViewController.h"  
@implementation ViewController 
@synthesize statusText; 
-(IBAction)buttonPressed:(id)sender 
 
{ 
     
    NSString *title = [sender titleForState:UIControlStateNormal];//sender用于获得了不同的button的文字titleForState是根据button状态获取文字的函数  
     
    NSString *newText = [[NSString alloc] initWithFormat:@"%@ button pressed.", title];//将title中的文字放入newText中  
     
    statusText.text = newText; 
     
} 
 
- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib.  
} 
 
- (void)viewDidUnload 
{ 
    [super viewDidUnload]; 
    self.statusText = nil; 
    // Release any retained subviews of the main view.  
} 
 
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { 
        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
    } else { 
        return YES; 
    } 
} 
- (void)dealloc 
{ 
    [statusText release]; 
     
    [super dealloc]; 
} 
@end 
#import "ViewController.h" @implementation ViewController @synthesize statusText; -(IBAction)buttonPressed:(id)sender { NSString *title = [sender titleForState:UIControlStateNormal];//sender用于获得了不同的button的文字titleForState是根据button状态获取文字的函数NSString *newText = [[NSString alloc] initWithFormat:@"%@ button pressed.", title];//将title中的文字放入newText中statusText.text = newText; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)viewDidUnload { [super viewDidUnload]; self.statusText = nil; // Release any retained subviews of the main view. } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } else { return YES; } } - (void)dealloc { [statusText release]; [super dealloc]; } @end
 
接着我们把这些代码与IB连接起来：
 

选择MainStoryboard_iphone.storyboard 右击View Controller Scene中的 Buton，选择Touch down与界面的

bottonPressed相连接：

接着将lable和statusText连接在一块：

最后运行程序，点击botton看看效果：

 

摘自 亨利摩根的专栏