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iOS调用相机,相册,上传头像

时间:2015-04-14 13:03:02      阅读:291      评论:0      收藏:0      [点我收藏+]

标签:ios   ios开发   图片   imageview   

一、新建工程  

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二、拖控件,创建映射 

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三、在.h中加入delegate

  1. @interface ViewController : UIViewController
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四、实现按钮事件 
  1. -(IBAction)chooseImage:(id)sender {
  2.     
  3.     UIActionSheet *sheet;
  4.     
  5.     // 判断是否支持相机

  6.     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])

  7.        {
  8.            sheet  = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"拍照",@"从相册选择", nil];

  9.        }

  10.     else {
  11.         
  12.         sheet = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"从相册选择", nil];

  13.     }
  14.     
  15.     sheet.tag = 255;
  16.     
  17.     [sheet showInView:self.view];
  18.     
  19. }
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五、实现actionSheet delegate事件
  1. -(void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
  2. {
  3.     if (actionSheet.tag == 255) {
  4.         
  5.         NSUInteger sourceType = 0;
  6.         
  7.         // 判断是否支持相机
  8.         if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
  9.             
  10.             switch (buttonIndex) {
  11.                 case 0:
  12.                     // 取消
  13.                     return;
  14.                 case 1:
  15.                     // 相机
  16.                     sourceType = UIImagePickerControllerSourceTypeCamera;
  17.                     break;
  18.                     
  19.                 case 2:
  20.                     // 相册
  21.                     sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
  22.                     break;
  23.             }
  24.         }
  25.         else {
  26.             if (buttonIndex == 0) {
  27.                 
  28.                 return;
  29.             } else {
  30.                 sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
  31.             }
  32.         }
  33.         // 跳转到相机或相册页面
  34.         UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
  35.         
  36.         imagePickerController.delegate = self;
  37.         
  38.         imagePickerController.allowsEditing = YES;
  39.         
  40.         imagePickerController.sourceType = sourceType;
  41.         
  42.         [self presentViewController:imagePickerController animated:YES completion:^{}];
  43.         
  44.         [imagePickerController release];
  45.     }
  46. }
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六、实现ImagePicker delegate 事件
  1. #pragma mark - image picker delegte
  2. - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
  3. {
  4.     [picker dismissViewControllerAnimated:YES completion:^{}];
  5.     
  6.     UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
  7.     /* 此处info 有六个值 
  8.      * UIImagePickerControllerMediaType; // an NSString UTTypeImage)
  9.      * UIImagePickerControllerOriginalImage;  // a UIImage 原始图片
  10.      * UIImagePickerControllerEditedImage;    // a UIImage 裁剪后图片
  11.      * UIImagePickerControllerCropRect;       // an NSValue (CGRect)
  12.      * UIImagePickerControllerMediaURL;       // an NSURL   
  13.      * UIImagePickerControllerReferenceURL    // an NSURL that references an asset in the AssetsLibrary framework
  14.      * UIImagePickerControllerMediaMetadata    // an NSDictionary containing metadata from a captured photo
  15.      */
  16.     // 保存图片至本地,方法见下文
  17.     [self saveImage:image withName:@"currentImage.png"];
  18.     
  19.     NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
  20.     
  21.     UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
  22.     
  23.     isFullScreen = NO;
  24.     [self.imageView setImage:savedImage];
  25.     
  26.     self.imageView.tag = 100;
  27.     
  28. }
  29. - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
  30. {
  31.         [self dismissViewControllerAnimated:YES completion:^{}];
  32. }
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七、保存图片
高保真压缩图片方法
  1. NSData * UIImageJPEGRepresentation ( UIImage *image, CGFloat compressionQuality
  2. )
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此方法可将图片压缩,但是图片质量基本不变,第二个参数即图片质量参数。

  1. #pragma mark - 保存图片至沙盒
  2. - (void) saveImage:(UIImage *)currentImage withName:(NSString *)imageName
  3. {
  4.     
  5.     NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);
  6.     // 获取沙盒目录
  7.     
  8.     NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];
  9.     // 将图片写入文件
  10.     
  11.     [imageData writeToFile:fullPath atomically:NO];
  12. }
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八、实现点击图片预览功能,滑动放大缩小,带动画 
  1. -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  2. {
  3.     
  4.     isFullScreen = !isFullScreen;
  5.     UITouch *touch = [touches anyObject];
  6.     
  7.     CGPoint touchPoint = [touch locationInView:self.view];
  8.     
  9.     CGPoint imagePoint = self.imageView.frame.origin;
  10.     //touchPoint.x ,touchPoint.y 就是触点的坐标
  11.     
  12.     // 触点在imageView内,点击imageView时 放大,再次点击时缩小
  13.     if(imagePoint.x <= touchPoint.x && imagePoint.x +self.imageView.frame.size.width >=touchPoint.x && imagePoint.y <=  touchPoint.y && imagePoint.y+self.imageView.frame.size.height >= touchPoint.y)
  14.     {
  15.         // 设置图片放大动画
  16.         [UIView beginAnimations:nil context:nil];
  17.         // 动画时间
  18.         [UIView setAnimationDuration:1];
  19.         
  20.         if (isFullScreen) {
  21.             // 放大尺寸
  22.             
  23.             self.imageView.frame = CGRectMake(0, 0, 320, 480);
  24.         }
  25.         else {
  26.             // 缩小尺寸
  27.             self.imageView.frame = CGRectMake(50, 65, 90, 115);
  28.         }
  29.         
  30.         // commit动画
  31.         [UIView commitAnimations];
  32.         
  33.     }
  34.     
  35. }
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九、上传图片,使用ASIhttpRequest类库实现,由于本文重点不是网络请求,故不对ASIHttpRequest详细讲述,只贴出部分代码

  1. ASIFormDataRequest *requestReport  = [[ASIFormDataRequest alloc] initWithURL:服务器地址];

  2. NSString *Path = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
  3.               
  4. [requestReport setFile:Path forKey:@"picturepath"];

  5. [requestReport buildPostBody];

  6. requestReport.delegate = self;

  7. [requestReport startAsynchronous];
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iOS调用相机,相册,上传头像

标签:ios   ios开发   图片   imageview   

原文地址:http://blog.csdn.net/q644419002/article/details/45039575

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