iOS 图片选择的路径处理（转）

下面我们仔细学习具体的细节。创建一个空的IOS项目，接着在创建一个ViewController。

AppDelegate.h 应用的代理类 这个没什么好说的就是直接打开刚刚创建的新ViewController。

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#import <UIKit/UIKit.h> #import "TestViewController.h"   @interface AppDelegate : UIResponder <UIApplicationDelegate>   @property (strong, nonatomic) UIWindow *window; @property (strong, nonatomic) UINavigationController *navController; @property (strong, nonatomic) UIViewController *viewController; @end

 

AppDelegate.m 在这里就是打开我们创建的TestViewController

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#import "AppDelegate.h"   @implementation AppDelegate   @synthesize window = _window; @synthesize navController; @synthesize viewController;   - (void)dealloc {     [_window release];     [super dealloc]; }   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];       self.window.backgroundColor = [UIColor whiteColor];     self.viewController =  [[TestViewController alloc]init];     self.navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];     [self.window addSubview:navController.view];       [self.window makeKeyAndVisible];     return YES; }   @end

 

TestViewController.h 注意这里面引入了很多代理类。

 

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#import <UIKit/UIKit.h>   @interface TestViewController : UIViewController<UITextViewDelegate,UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate> {     //输入框     UITextView *_textEditor;       //下拉菜单     UIActionSheet *myActionSheet;       //图片2进制路径     NSString* filePath; } @end

 

TestViewController.m 请大家仔细看这个类， 所有的东西都写在了这里哈。

 

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#import "TestViewController.h"   @interface TestViewController ()   @end   @implementation TestViewController   - (void)viewDidLoad {     [super viewDidLoad];     //导航栏标题 self.navigationItem.title = @"雨松MOMO输入框";       //导航栏按钮     self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]                                                initWithTitle: @"发送"                                                style: UIBarButtonItemStyleDone                                                target: self                                                action: @selector(sendInfo)] autorelease];       //输入框显示区域     _textEditor = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, 320, 100)];     //设置它的代理     _textEditor.delegate = self;     _textEditor.autoresizingMask = UIViewAutoresizingFlexibleWidth;     _textEditor.keyboardType = UIKeyboardTypeDefault;     _textEditor.font = [UIFont systemFontOfSize:20];     _textEditor.text = @"请输入内容";       //默认软键盘是在触摸区域后才会打开     //这里表示进入当前ViewController直接打开软键盘     [_textEditor becomeFirstResponder];       //把输入框加在视图中     [self.view addSubview:_textEditor];       //下方的图片按钮 点击后呼出菜单 打开摄像机 查找本地相册     UIImage *image = [[UIImage alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"camera" ofType:@"png"]];       UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];     button.frame = CGRectMake(0, 120, image.size.width, image.size.height);       [button setImage:image forState:UIControlStateNormal];       [button addTarget:self action:@selector(openMenu) forControlEvents:UIControlEventTouchUpInside];       //把它也加在视图当中     [self.view addSubview:button];   }   -(void)openMenu {     //在这里呼出下方菜单按钮项     myActionSheet = [[UIActionSheet alloc]                  initWithTitle:nil                  delegate:self                  cancelButtonTitle:@"取消"                  destructiveButtonTitle:nil                  otherButtonTitles: @"打开照相机", @"从手机相册获取",nil];         [myActionSheet showInView:self.view];     [myActionSheet release];       }   - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {       //呼出的菜单按钮点击后的响应     if (buttonIndex == myActionSheet.cancelButtonIndex)     {         NSLog(@"取消");     }       switch (buttonIndex)     {         case 0:  //打开照相机拍照             [self takePhoto];             break;           case 1:  //打开本地相册             [self LocalPhoto];             break;     } }   //开始拍照 -(void)takePhoto {     UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;     if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])     {         UIImagePickerController *picker = [[UIImagePickerController alloc] init];         picker.delegate = self;         //设置拍照后的图片可被编辑         picker.allowsEditing = YES;         picker.sourceType = sourceType;         [picker release];         [self presentModalViewController:picker animated:YES];     }else     {         NSLog(@"模拟其中无法打开照相机,请在真机中使用");     } }   //打开本地相册 -(void)LocalPhoto {     UIImagePickerController *picker = [[UIImagePickerController alloc] init];       picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;     picker.delegate = self;     //设置选择后的图片可被编辑     picker.allowsEditing = YES;     [self presentModalViewController:picker animated:YES];     [picker release]; }   //当选择一张图片后进入这里 -(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info   {       NSString *type = [info objectForKey:UIImagePickerControllerMediaType];       //当选择的类型是图片     if ([type isEqualToString:@"public.image"])     {         //先把图片转成NSData         UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];         NSData *data;         if (UIImagePNGRepresentation(image) == nil)         {             data = UIImageJPEGRepresentation(image, 1.0);         }         else         {             data = UIImagePNGRepresentation(image);         }           //图片保存的路径         //这里将图片放在沙盒的documents文件夹中         NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];             //文件管理器         NSFileManager *fileManager = [NSFileManager defaultManager];           //把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png         [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];         [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];           //得到选择后沙盒中图片的完整路径         filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];           //关闭相册界面         [picker dismissModalViewControllerAnimated:YES];           //创建一个选择后图片的小图标放在下方         //类似微薄选择图后的效果         UIImageView *smallimage = [[[UIImageView alloc] initWithFrame:                                    CGRectMake(50, 120, 40, 40)] autorelease];               smallimage.image = image;         //加在视图中         [self.view addSubview:smallimage];       }   }   - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {     NSLog(@"您取消了选择图片");     [picker dismissModalViewControllerAnimated:YES]; }   -(void)sendInfo {     NSLog(@"图片的路径是：%@", filePath);       NSLog(@"您输入框中的内容是：%@", _textEditor.text); }   - (void)viewDidUnload {     [super viewDidUnload];     // Release any retained subviews of the main view. }   - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {     return (interfaceOrientation == UIInterfaceOrientationPortrait); }   @end

如下图所示，打开下拉菜单按钮开始选择打开相机 或者 打开本地相册。模拟器中是无法打开照相机的的，切记。

 

如下图所示，这里就是我本地的相册啦，里面保存了几张图片，选择一张即可。

 

 

 

我在这里再说说图片上传， 图片上传我们采用的是2进制ASIHTTPRequest 来完成的。

发送请求

 

 

 

 

C#

 

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NSString *server_base = [NSString stringWithFormat:@"%@/users/uploadResource.json", _server];       ASINetworkQueue *queue = [[ASINetworkQueue alloc] init];         ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:server_base]];       [ASIHTTPRequest setShouldUpdateNetworkActivityIndicator: NO];     [request setDelegate :self];     [request setDidFinishSelector:@selector(sendCommentSucc:)];     [request setDidFailSelector:@selector(sendCommentFail:)];     // res 就是 需要上传图片文件的路径     [request setFile:res forKey:@"res"];       [queue addOperation:request];     [queue go];

 

最后是文本的源码，雨松MOMO祝大家学习愉快，不早了，我也得睡觉啦，1点多了。。。

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