iphone开发小记

程序功能：点击Button实现按钮的文本变换

一，打开Xcode，新建single view based application，拖动一个Button控件到屏幕中间

项目目录树下包含AppDelegate.h AppDelegate.m MainStoryboard.storyboard ViewController.h ViewController.h等文件
其中MainStoryboard.storyboard用来设计UI界面，ViewController.*文件用来编码

ViewController.m代码如下

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

- (void)dealloc {
    [super dealloc];
}
@end

ViewController.h代码如下

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end

二，通过图形界面实现Button控件的属性（ID）及动作（Action）的配置

1,鼠标拖动Touch Down事件到ViewController.h文件，xcode会自动提示插入Action

2,设置Action名称为（OnBtnTouch）

3,同理，配置按钮的名称（ID），可以在程序中通过这个ID号控制控件

三，打开ViewController.m文件实现OnBtnTouch的具体逻辑，代码如下：

ViewController.m代码如下

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize ibtn;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)viewDidUnload
{
    [self setIbtn:nil];
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

- (void)dealloc {
    [ibtn release];
    [super dealloc];
}
- (IBAction)OnBtnTouch:(id)sender {
    [ibtn setTitle:@"Go to Work!" forState:UIControlStateNormal];
}
@end

ViewController.h代码如下

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

- (IBAction)OnBtnTouch:(id)sender;

@property (retain, nonatomic) IBOutlet UIButton *ibtn;

@end

我们只手动添加了下面这行代码，其他都是xcode帮我们自动生成的

[ibtnsetTitle:@"Go to Work!"forState:UIControlStateNormal];