从相册中选择或拍照设置并上传头像图片

相信很多app中都有通过拍照或者从相册中选择的方式设置并上传头像的功能。如下是我之前一个项目中通过相册或者拍照获取图片的一个功能（照片来源于网络）。现在把代码贴出来，大家使用时（点击imageView或者button时），只需要调用- (void)didTapHeaderImageView方法，即可实现通过相册或者拍照的方式获取照片的功能。



照片来源于网络

设置头像

- (void)didTapHeaderImageView
{
NSLog(@"点击了头像");
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"照片" message:@"拍照或者从相册中选择照片" preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * __nonnull action) { // 点击了拍照按钮"

// 拍照
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

picker.allowsEditing = YES;
picker.sourceType = sourceType;
[self presentViewController:picker animated:YES completion:nil];
}else
{
NSLog(@"模拟其中无法打开照相机,请在真机中使用");
}

}];
UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * __nonnull action) { // 点击了相册按钮

if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) { // 没有相册
return;
}

UIImagePickerController *pickerVC = [[UIImagePickerController alloc] init];
pickerVC.delegate = self;

pickerVC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:pickerVC animated:YES completion:nil];
}];
UIAlertAction *action3 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * __nonnull action) {

}];

[alertController addAction:action1];
[alertController addAction:action2];
[alertController addAction:action3];

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

}

#pragma mark - UIImagePickerControllerDelegate
- (void)imagePickerController:(nonnull UIImagePickerController *)picker didFinishPickingMediaWithInfo:(nonnull NSDictionary<NSString *,id> *)info
{
NSString *type = [info objectForKey:UIImagePickerControllerMediaType];

if ([type isEqualToString:@"public.image"])
{

UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *data;
if (UIImagePNGRepresentation(image) == nil)
{
data = UIImageJPEGRepresentation(image, 1.0);
}
else
{
data = UIImagePNGRepresentation(image);
}

NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

NSFileManager *fileManager = [NSFileManager defaultManager];

[fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
NSString *imageName = [NSString stringWithFormat:@"/headerImage.png"];

[fileManager createFileAtPath:[DocumentsPath stringByAppendingString:imageName] contents:data attributes:nil];
//        [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];

//得到沙盒中图片的完整路径
NSString *filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  imageName];
image = [UIImage imageWithContentsOfFile:filePath];

//        NSData * imageData = UIImageJPEGRepresentation(image,1);
//        NSInteger length = [imageData length]/1000;
//        NSLog(@"%ld",length);

//关闭相册界面
[picker dismissViewControllerAnimated:YES completion:nil];

UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[self.tableView addSubview:btn];
btn.backgroundColor = [UIColor redColor];
[self.headerImageView setImage:image];
}
}

// 用户取消了操作
- (void)imagePickerControllerDidCancel:(nonnull UIImagePickerController *)picker{
[picker dismissViewControllerAnimated:YES completion:nil];
}

文／VV木公子（简书作者）
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