iOS-iOS8之后的UIAlertViewController

深藏阁楼爱情的钟 2023-10-16 22:54 39阅读 0赞

一、iOS8之前
    1、使用UIActionSheet作为弹出框
                    UIActionSheet *actionSheet;
                    //判断是否支持相机
                    if([UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
                        actionSheet = [[UIActionSheetalloc]initWithTitle:@"获取图片"delegate:selfcancelButtonTitle:@"取消"destructiveButtonTitle:nilotherButtonTitles:@"拍照",@"从相册选择", nil];
                    }else{
                        actionSheet = [[UIActionSheetalloc]initWithTitle:@"获取图片"delegate:selfcancelButtonTitle:@"取消"destructiveButtonTitle:nilotherButtonTitles:@"从相册选择",nil];
                }
                   [actionSheet showInView:self.view];
    
    #pragma mark- actionSheet delegate
    - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
        if (actionSheet.tag == 1000) {
            NSUInteger sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
            // 判断是否支持相机
            if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
                switch (buttonIndex) {
                    case 0:
                        //来源:相机
                        sourceType = UIImagePickerControllerSourceTypeCamera;
                        break;
                    case 1:
                        //来源:相册
                        sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                        break;
                    case 2:
                        return;
                }
            }
            else {
                if (buttonIndex == 2) {
                    return;
                } else {
                    sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
                }
            }
            // 跳转到相机或相册页面
            UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
            imagePickerController.delegate = self;
            imagePickerController.allowsEditing = YES;
            imagePickerController.sourceType = sourceType;
            [self presentViewController:imagePickerController animated:YES completion:^{
            }];
        }
    }
    
    2、使用UIAlertView
    -(void)showAlert:(NSString *)msg {  
            UIAlertView *alert = [[UIAlertView alloc]  
                                  initWithTitle:@"Action Sheet选择项"  
                                  message:msg  
                                  delegate:self  
                                  cancelButtonTitle:@"确定"  
                                  otherButtonTitles: nil];  
            [alert show];  
    
    二、iOS8之后将UIAlertView，UIActionSheet都使用UIAlertViewController来弹出提示框
    #define IOS8 ([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0 ? YES : NO)
            if (IOS8)
                {
                    UIAlertController *alertVC = [UIAlertControlleralertControllerWithTitle:@"获取图片"
                                                                                    message:nil
                                                                             preferredStyle:UIAlertControllerStyleActionSheet];
    
                    //判断是否支持相机（模拟器没有相机）
                    BOOL isCamera = [UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];
                    if (isCamera)
                    {
                        UIAlertAction *cameraAction = [UIAlertActionactionWithTitle:@"拍照"
                                                                               style:UIAlertActionStyleDefault
                                                                             handler:^(UIAlertAction *_Nonnull action) {
                            //相机
                            UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc]init];
                            imagePicker.delegate =self;
                            imagePicker.allowsEditing =YES;
                            imagePicker.sourceType =UIImagePickerControllerSourceTypeCamera;
                            [selfpresentViewController:imagePickeranimated:YEScompletion:nil];
                        }];
                        [alertVC addAction:cameraAction];
                    }
    
                    UIAlertAction *photoAction = [UIAlertActionactionWithTitle:@"从相册选择"
                                                                          style:UIAlertActionStyleDefault
                                                                        handler:^(UIAlertAction *_Nonnull action) {
                                                                            //相册
                                                                            UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc]init];
                                                                             imagePicker.delegate =self;
                                                                             imagePicker.allowsEditing =YES;
                                                                             imagePicker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;
                                                                             [selfpresentViewController:imagePickeranimated:YEScompletion:nil];
                                                                         }];
                [alertVC addAction:photoAction];
                
                UIAlertAction *cancelAction = [UIAlertActionactionWithTitle:@"取消"
                                                                     style:UIAlertActionStyleCancel
                                                                   handler:^(UIAlertAction *_Nonnull action) {
                                                                    }];
                [alertVC addAction:cancelAction];
                    
                //弹出视图 使用UIViewController方法
                [selfpresentViewController:alertVCanimated:YEScompletion:nil];
               }
                else
                {
                    UIActionSheet *actionSheet;
                    //判断是否支持相机
                    if([UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
                        actionSheet = [[UIActionSheetalloc]initWithTitle:@"获取图片"delegate:selfcancelButtonTitle:@"取消"destructiveButtonTitle:nilotherButtonTitles:@"拍照",@"从相册选择", nil];
                    }else{
                        actionSheet = [[UIActionSheetalloc]initWithTitle:@"获取图片"delegate:selfcancelButtonTitle:@"取消"destructiveButtonTitle:nilotherButtonTitles:@"从相册选择",nil];
                }
                   [actionSheet showInView:self.view];
                }
    
    #pragma mark- imagePicker delegate
    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
    {
        [picker dismissViewControllerAnimated:YES completion:^{ 
        }];
        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
        //保存图片至本地，上传图片到服务器需要使用
        [self saveImage:image withName:@"haha.png"];
        NSString *filePath = [[NSHomeDirectory()stringByAppendingPathComponent:@"Documents"]stringByAppendingPathComponent:@"haha.png"];
        UIImage *savedImage = [[UIImage alloc]initWithContentsOfFile:filePath];
        //设置图片显示
        [self.photoImgView setImage:savedImage];
    }
    
    //将图片保存至沙盒
    - (void)saveImage:(UIImage *)currentImage withName:(NSString *)imgName
    {
        //1为不缩放保存，取值（0.0 － 1.0）
        NSData *imgData = UIImageJPEGRepresentation(currentImage, 1);
        //获取沙盒目录
        NSString *filePath = [[NSHomeDirectory()stringByAppendingPathComponent:@"Documents"]stringByAppendingPathComponent:imgName];
        NSLog(@"沙盒路径：%@",NSHomeDirectory());
        //将图片写入文件
        [imgData writeToFile:filePath atomically:YES];
    }
    
    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
    {
        [self dismissViewControllerAnimated:YES completion:nil];
    }

还可参考博主转载的[iOS8中提示框的使用UIAlertController(UIAlertView)][iOS8_UIAlertController_UIAlertView]

[iOS8_UIAlertController_UIAlertView]: http://blog.csdn.net/minggeqingchun/article/details/51578162