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iOS实现头像选取(照相或者图片库)、大小等比缩放、生成圆形头像

iOS实现头像选取(照相或者图片库)、大小等比缩放、生成圆形头像

作者: xuejunjun | 来源:发表于2015-05-07 12:05 被阅读1756次

    /弹出actionsheet。选择获取头像的方式

    //从相册获取图片

    -(void)takePictureClick:(UIButton *)sender

    {

    //    /*注:使用,需要实现以下协议:UIImagePickerControllerDelegate,

    //    UINavigationControllerDelegate

    //    */

    //    UIImagePickerController *picker = [[UIImagePickerController alloc]init];

    //    //设置图片源(相簿)

    //    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

    //    //设置代理

    //    picker.delegate = self;

    //    //设置可以编辑

    //    picker.allowsEditing = YES;

    //    //打开拾取器界面

    //    [self presentViewController:picker animated:YES completion:nil];

    UIActionSheet* actionSheet = [[UIActionSheet alloc]

    initWithTitle:@"请选择文件来源"

    delegate:self

    cancelButtonTitle:@"取消"

    destructiveButtonTitle:nil

    otherButtonTitles:@"照相机",@"摄像机",@"本地相簿",@"本地视频",nil];

    [actionSheet showInView:self.view];

    }

    #pragma mark -

    #pragma UIActionSheet Delegate

    - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex

    {

    NSLog(@"buttonIndex = [%d]",buttonIndex);

    switch (buttonIndex) {

    case 0://照相机

    {

    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.delegate = self;

    imagePicker.allowsEditing = YES;

    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

    //            [self presentModalViewController:imagePicker animated:YES];

    [self presentViewController:imagePicker animated:YES completion:nil];

    }

    break;

    case 1://摄像机

    {

    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.delegate = self;

    imagePicker.allowsEditing = YES;

    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

    imagePicker.videoQuality = UIImagePickerControllerQualityTypeLow;

    //            [self presentModalViewController:imagePicker animated:YES];

    [self presentViewController:imagePicker animated:YES completion:nil];

    }

    break;

    case 2://本地相簿

    {

    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.delegate = self;

    imagePicker.allowsEditing = YES;

    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    //            [self presentModalViewController:imagePicker animated:YES];

    [self presentViewController:imagePicker animated:YES completion:nil];

    }

    break;

    case 3://本地视频

    {

    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.delegate = self;

    imagePicker.allowsEditing = YES;

    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    //            [self presentModalViewController:imagePicker animated:YES];

    [self presentViewController:imagePicker animated:YES completion:nil];

    }

    break;

    default:

    break;

    }

    }

    #pragma mark -

    #pragma UIImagePickerController Delegate

    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

    {

    if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(__bridge NSString *)kUTTypeImage]) {

    UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];

    [self performSelector:@selector(saveImage:)  withObject:img afterDelay:0.5];

    }

    else if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(__bridge NSString *)kUTTypeMovie]) {

    NSString *videoPath = [[info objectForKey:UIImagePickerControllerMediaURL] path];

    self.fileData = [NSData dataWithContentsOfFile:videoPath];

    }

    //    [picker dismissModalViewControllerAnimated:YES];

    [picker dismissViewControllerAnimated:YES completion:nil];

    }

    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

    {

    //    [picker dismissModalViewControllerAnimated:YES];

    [picker dismissViewControllerAnimated:YES completion:nil];

    }

    - (void)saveImage:(UIImage *)image {

    //    NSLog(@"保存头像!");

    //    [userPhotoButton setImage:image forState:UIControlStateNormal];

    BOOL success;

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSError *error;

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:@"selfPhoto.jpg"];

    NSLog(@"imageFile->>%@",imageFilePath);

    success = [fileManager fileExistsAtPath:imageFilePath];

    if(success) {

    success = [fileManager removeItemAtPath:imageFilePath error:&error];

    }

    //    UIImage *smallImage=[self scaleFromImage:image toSize:CGSizeMake(80.0f, 80.0f)];//将图片尺寸改为80*80

    UIImage *smallImage = [self thumbnailWithImageWithoutScale:image size:CGSizeMake(93, 93)];

    [UIImageJPEGRepresentation(smallImage, 1.0f) writeToFile:imageFilePath atomically:YES];//写入文件

    UIImage *selfPhoto = [UIImage imageWithContentsOfFile:imageFilePath];//读取图片文件

    //    [userPhotoButton setImage:selfPhoto forState:UIControlStateNormal];

    self.img.image = selfPhoto;

    }

    // 改变图像的尺寸,方便上传服务器

    - (UIImage *) scaleFromImage: (UIImage *) image toSize: (CGSize) size

    {

    UIGraphicsBeginImageContext(size);

    [image drawInRect:CGRectMake(0, 0, size.width, size.height)];

    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return newImage;

    }

    2.保持原来的长宽比,生成一个缩略图

    - (UIImage *)thumbnailWithImageWithoutScale:(UIImage *)image size:(CGSize)asize

    {

    UIImage *newimage;

    if (nil == image) {

    newimage = nil;

    }

    else{

    CGSize oldsize = image.size;

    CGRect rect;

    if (asize.width/asize.height > oldsize.width/oldsize.height) {

    rect.size.width = asize.height*oldsize.width/oldsize.height;

    rect.size.height = asize.height;

    rect.origin.x = (asize.width - rect.size.width)/2;

    rect.origin.y = 0;

    }

    else{

    rect.size.width = asize.width;

    rect.size.height = asize.width*oldsize.height/oldsize.width;

    rect.origin.x = 0;

    rect.origin.y = (asize.height - rect.size.height)/2;

    }

    UIGraphicsBeginImageContext(asize);

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [[UIColor clearColor] CGColor]);

    UIRectFill(CGRectMake(0, 0, asize.width, asize.height));//clear background

    [image drawInRect:rect];

    newimage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    }

    return newimage;

    }

    3.显示圆形头像

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:@"selfPhoto.jpg"];

    NSLog(@"imageFile->>%@",imageFilePath);

    UIImage *selfPhoto = [UIImage imageWithContentsOfFile:imageFilePath];//

    self.img.image = selfPhoto;

    [self.img.layer setCornerRadius:CGRectGetHeight([self.img bounds]) / 2];  //修改半径,实现头像的圆形化

    self.img.layer.masksToBounds = YES;

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        本文标题:iOS实现头像选取(照相或者图片库)、大小等比缩放、生成圆形头像

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