今天项目里要用到图片的裁剪功能,本来想找第三方,但是查了下资料,觉得如果只是要简单的实现其实也不难,所以决定自己写一下
// 关于图片的选择 //点击要选取图片的view的时候要弹出两个选项,拍照和选取本地 - (void)addImageClick { [_drawlineView removeFromSuperview]; // [self takePhotoAction]; UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:@"请选择获取方式" message:nil preferredStyle:UIAlertControllerStyleActionSheet]; [actionSheet addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) { // Cancel button tappped. [self dismissViewControllerAnimated:YES completion:^{ }]; }]]; [actionSheet addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { // 拍摄新照片 [self takePhotoAction]; }]]; [actionSheet addAction:[UIAlertAction actionWithTitle:@"从相册选" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { // 从相片中读取 [self browseAlbum]; }]]; [self presentViewController:actionSheet animated:YES completion:nil]; } //拍照 //最好就是要判断一下相机可不可用, allowsEditing是用来设置照片是否可以编辑,就是会不会出现一个框框来约束图片的比例 // sourceType 在拍照时用的 UIImagePickerControllerSourceTypeCamera 在选取图片时用 UIImagePickerControllerSourceTypeSavedPhotosAlbum - (void)takePhotoAction { BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear]; if (!isCamera) { //若不可用，弹出警告框 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"无可用摄像头" message:nil delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alert show]; return; } UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; imagePicker.allowsEditing = YES; imagePicker.delegate = self; [self presentViewController:imagePicker animated:YES completion:nil]; } //不管拍照还是选取本地图片,完成后都会调用这个方法 //info 里面放的图片的所有信息 UIImagePickerControllerOriginalImage这个key拿的是原图 UIImagePickerControllerEditedImage拿的是图片裁剪后的图 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSString *mediaType = info[@"UIImagePickerControllerMediaType"]; if ([mediaType isEqualToString:@"public.image"]) { //判断是否为图片 UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];//这里拿到图片 //拿到图片,你要做什么事........ { //do something } //通过判断picker的sourceType，如果是拍照则保存到相册去 if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) { UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil); } } } - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { // Was there an error? if (error != NULL) { // Show error message... [WSToast showToastWithTitle:error.description duration:TOAST_VIEW_TIME completeCallBack:nil]; } else // No errors { // Show message image successfully saved [WSToast showToastWithTitle:@"图片已保存" duration:TOAST_VIEW_TIME completeCallBack:nil]; } }WSToast 是我项目里面封装的提示展示框,当然,这只是简单的实现裁剪,裁剪的比例是固定不变的,而且也不能多选,就是简单的需求而已
转载于:https://www.cnblogs.com/yulongjiayuan/p/5857809.html
相关资源：ios-自定义相机 图片裁剪 图片编辑.zip