实例iPhone编程入门教程-第三天

DAY THREE
- OPEN URL

大家一起来建立一个 iPhone app，给你的iPhone打开google地图有效地址连接。

首先运行以安装好的 xCode

选择: File->New Project.

从 "New Project" 窗口

选择 : iPhone OS ->Applications-> View-Based Application

命名 : 我这里命名为 "OpenURL"

(1) 在xCode打开 OpenURLViewController.h 文件,加入下面红色代码

#import <UIKit/UIKit.h>

@imterface OpenURLViewController : UIViewController{

}

-(IBaction)openMaps;

@end

(2) 在xCode打开 OpenURLViewController.m 文件,加入下面红色代码

#import <UIKit/UIKit.h#import "Day3ViewController.h"

@implementation Day3ViewController

// The designated initializer. Override to perform setup that is required before the view is loaded.

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {

if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {

// Custom initialization

}

return self;

}

-(IBAction)openMaps{

NSString* addressText = @"1 Queen st, Auckland, NZ";

addressText = [addressText stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding];

NSString* urlText = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@",addressText];

//NSlog(urlText);

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlText]];

}

// Override to allow orientations other than the default portrait orientation.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

// Return YES for supported orientations

return (interfaceOrientation == UIInterfaceOrientationPortrait);

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview

// Release anything that's not essential, such as cached data

}

- (void)dealloc {

[super dealloc];

}

@end

(3) UIView 界面设置

- 黑色背景，红色字体，让它看起来像一个闹钟。

双击文件： "OpenURLViewController.xib" ；

然后 "Interface Builder" 会自动打开，在这里我们可以编辑改变界面

选择： Tools -> Reveal In Document Window -> View

选择: Tools -> Attributes Inspector

在色条内选择 "黑色"，可以看到背景变为黑色

(4) 加入 Button ,点击后打开连接

选择: Tools -> Library ；从Library显示菜单中拖拉一个 Button 到 Main View

在主显示上点击 Button；从Button Attributes 里面Title内填上 "Open Google Map"。

(5)从 Interface Builder 写入 UIButton 的 class file

再打开SDK工具 Interface Builder

在主视窗口或文件窗口；点击 Button

选择: Tools -> Connection Inspector

移动鼠标在"Touch Up Inside" 后面圆圈上; 圆圈变为(+); 拖向直线连接到"File's Owner";

放开鼠标选择键出现 "openMaps"; 选上它。

选择： File -> Save then close Interface Builde

最后在 xCode 选择 Build->Build and Go

下载今天程序文件:
OpenURL.zip