IOS-照相，相片选取

来源：互联网发布：js中eval函数是干嘛的编辑：程序博客网时间：2024/04/29 06:54

初始化

 UIImagePickerControllerSourceType sourceType;        switch (buttonIndex)        {            case 0:                sourceType = UIImagePickerControllerSourceTypeCamera;                if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])                {                    sourceType = UIImagePickerControllerSourceTypePhotoLibrary;                }                break;            default:                sourceType =  UIImagePickerControllerSourceTypePhotoLibrary;                break;        }        NSString *mediaType = AVMediaTypeVideo;        AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];        if(authStatus ==AVAuthorizationStatusRestricted){//此应用程序没有被授权访问的照片数据。可能是家长控制权限。        }else if(authStatus == AVAuthorizationStatusDenied){// 用户已经明确否认了这一照片数据的应用程序访问            [self showAlertView:@"热波间需要访问你的相机" message:@"头像修改，热波间需要访问你的相机权限。点击“设置”前往系统设置允许热波间访问你的相机" confirm:^(id sender) {                [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];            } cancel:^(id sender) {            }];            return;        }        else if(authStatus == AVAuthorizationStatusAuthorized){//用户已授权应用访问照片数据.            UIImagePickerController *picker = [[UIImagePickerController alloc] init];            picker.delegate = self;            picker.allowsEditing = YES;            picker.sourceType = sourceType;            picker.mediaTypes = @[(NSString *) kUTTypeImage];            [self presentViewController:picker animated:YES completion:nil];        }else if(authStatus == AVAuthorizationStatusNotDetermined){// 用户尚未做出了选择这个应用程序的问候.一次一出现            [AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {//弹出授权弹框                if(granted){//点击允许访问时调用                            UIImagePickerController *picker = [[UIImagePickerController alloc] init];                            picker.delegate = self;                            picker.allowsEditing = YES;                            picker.sourceType = sourceType;                            picker.mediaTypes = @[(NSString *) kUTTypeImage];                            [self presentViewController:picker animated:YES completion:nil];                }                else {                    return ;                }            }];        }else {            NSLog(@"Unknown authorization status");        }

Delegate

#pragma mark UIImagePickerController Delegate- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];    if ([mediaType isEqualToString:@"public.image"])    {        MBProgressHUD *mbProgressHud = [[MBProgressHUD alloc] initWithView:self.view];        [self.view addSubview:mbProgressHud];        [mbProgressHud show:YES];        //[info objectForKey:@"UIImagePickerControllerEditedImage"];        NSString *tempDir = NSTemporaryDirectory ();        NSString *tempFile = [NSString stringWithFormat:@"%@/avatar.png",tempDir];        UIImage *avatar = [info objectForKey:@"UIImagePickerControllerEditedImage"];        float scale = MAX(avatar.size.width/150,avatar.size.height/150);        avatar = [UIImage imageWithCGImage:avatar.CGImage scale:scale orientation:UIImageOrientationUp];        [UIImagePNGRepresentation(avatar) writeToFile:tempFile atomically:YES];        __weak typeof(self) weakSelf = self;        updateCurrUserModel *userModel = [[updateCurrUserModel alloc] init];        [userModel uploadDataWithFileUrl:tempFile params:nil success:^(id object) {            __strong typeof(self) strongSelf = weakSelf;            if (strongSelf)            {                /*成功返回数据*/                if (userModel.result == 0)                {                    strongSelf.selectedImg = avatar;                    strongSelf.headImgView.image = avatar;                    strongSelf.userInfo.photo = userModel.data;                    float quality = .00001f;                    float blurred = .2f;                    NSData *imageData = UIImageJPEGRepresentation([strongSelf.headImgView image], quality);                    UIImage *blurredImage = [[UIImage imageWithData:imageData] blurredImage:blurred];                    _backImageView.image = blurredImage;                    [UserInfoManager shareUserInfoManager].currentUserInfo.photo = userModel.data;                    NSError *error;                    [[NSFileManager defaultManager] removeItemAtPath:tempFile error:&error];                }            }            [mbProgressHud hide:YES];        } fail:^(id object) {            /*失败返回数据*/            [mbProgressHud hide:YES];            [self showNoticeInWindow:@"网络连接失败，请重试" duration:1.5];        }];    }    [picker dismissViewControllerAnimated:YES completion:nil];}

图片裁剪

获取到图片后反转

//压缩图片  - (UIImage *)image:(UIImage*)image scaledToSize:(CGSize)newSize  {      // Create a graphics image context      UIGraphicsBeginImageContext(newSize);      // Tell the old image to draw in this new context, with the desired      // new size      [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];      // Get the new image from the context      UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();      // End the context      UIGraphicsEndImageContext();      // Return the new image.      return newImage;  }

方法2

//裁剪图片  - (UIImage *)cutImage:(UIImage*)image  {      //压缩图片      CGSize newSize;      CGImageRef imageRef = nil;      if ((image.size.width / image.size.height) < (_headerView.bgImgView.size.width / _headerView.bgImgView.size.height)) {          newSize.width = image.size.width;          newSize.height = image.size.width * _headerView.bgImgView.size.height / _headerView.bgImgView.size.width;          imageRef = CGImageCreateWithImageInRect([image CGImage], CGRectMake(0, fabs(image.size.height - newSize.height) / 2, newSize.width, newSize.height));      } else {          newSize.height = image.size.height;          newSize.width = image.size.height * _headerView.bgImgView.size.width / _headerView.bgImgView.size.height;          imageRef = CGImageCreateWithImageInRect([image CGImage], CGRectMake(fabs(image.size.width - newSize.width) / 2, 0, newSize.width, newSize.height));      }      return [UIImage imageWithCGImage:imageRef];  }

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