iOS调用相机,相册,上传头像 分类: ios技术 2015-04-14 11:23 256人阅读 评论(0) 收藏

时间:2023-12-29 15:36:08

一、新建工程

iOS调用相机,相册,上传头像                                                    分类:            ios技术             2015-04-14 11:23    256人阅读    评论(0)    收藏

二、拖控件,创建映射

iOS调用相机,相册,上传头像                                                    分类:            ios技术             2015-04-14 11:23    256人阅读    评论(0)    收藏

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. UIActionSheet *sheet;
  3. // 判断是否支持相机
  4. if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
  5. {
  6. sheet  = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"拍照",@"从相册选择", nil];
  7. }
  8. else {
  9. sheet = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"从相册选择", nil];
  10. }
  11. sheet.tag = 255;
  12. [sheet showInView:self.view];
  13. }

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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. NSUInteger sourceType = 0;
  5. // 判断是否支持相机
  6. if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
  7. switch (buttonIndex) {
  8. case 0:
  9. // 取消
  10. return;
  11. case 1:
  12. // 相机
  13. sourceType = UIImagePickerControllerSourceTypeCamera;
  14. break;
  15. case 2:
  16. // 相册
  17. sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
  18. break;
  19. }
  20. }
  21. else {
  22. if (buttonIndex == 0) {
  23. return;
  24. } else {
  25. sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
  26. }
  27. }
  28. // 跳转到相机或相册页面
  29. UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
  30. imagePickerController.delegate = self;
  31. imagePickerController.allowsEditing = YES;
  32. imagePickerController.sourceType = sourceType;
  33. [self presentViewController:imagePickerController animated:YES completion:^{}];
  34. [imagePickerController release];
  35. }
  36. }

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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. UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
  6. /* 此处info 有六个值
  7. * UIImagePickerControllerMediaType; // an NSString UTTypeImage)
  8. * UIImagePickerControllerOriginalImage;  // a UIImage 原始图片
  9. * UIImagePickerControllerEditedImage;    // a UIImage 裁剪后图片
  10. * UIImagePickerControllerCropRect;       // an NSValue (CGRect)
  11. * UIImagePickerControllerMediaURL;       // an NSURL
  12. * UIImagePickerControllerReferenceURL    // an NSURL that references an asset in the AssetsLibrary framework
  13. * UIImagePickerControllerMediaMetadata    // an NSDictionary containing metadata from a captured photo
  14. */
  15. // 保存图片至本地,方法见下文
  16. [self saveImage:image withName:@"currentImage.png"];
  17. NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];
  18. UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
  19. isFullScreen = NO;
  20. [self.imageView setImage:savedImage];
  21. self.imageView.tag = 100;
  22. }
  23. - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
  24. {
  25. [self dismissViewControllerAnimated:YES completion:^{}];
  26. }

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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. NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);
  5. // 获取沙盒目录
  6. NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];
  7. // 将图片写入文件
  8. [imageData writeToFile:fullPath atomically:NO];
  9. }

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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. isFullScreen = !isFullScreen;
  4. UITouch *touch = [touches anyObject];
  5. CGPoint touchPoint = [touch locationInView:self.view];
  6. CGPoint imagePoint = self.imageView.frame.origin;
  7. //touchPoint.x ,touchPoint.y 就是触点的坐标
  8. // 触点在imageView内,点击imageView时 放大,再次点击时缩小
  9. 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)
  10. {
  11. // 设置图片放大动画
  12. [UIView beginAnimations:nil context:nil];
  13. // 动画时间
  14. [UIView setAnimationDuration:1];
  15. if (isFullScreen) {
  16. // 放大尺寸
  17. self.imageView.frame = CGRectMake(0, 0, 320, 480);
  18. }
  19. else {
  20. // 缩小尺寸
  21. self.imageView.frame = CGRectMake(50, 65, 90, 115);
  22. }
  23. // commit动画
  24. [UIView commitAnimations];
  25. }
  26. }

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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. [requestReport setFile:Path forKey:@"picturepath"];
  4. [requestReport buildPostBody];
  5. requestReport.delegate = self;
  6. [requestReport startAsynchronous];

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