iOS 开发APP更换用户头像问题的处理方式

iOS 开发APP更换用户头像问题的处理方式

1.常见的处理方式:SDWebImage处理

这种使用方式是后台提供头像下载的URL

使用的方法—options参数选择options:SDWebImageRefreshCached–会自动更新头像

- (void)sd_setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options completed:(SDWebImageCompletionBlock)completedBlock {
[self sd_setImageWithURL:url placeholderImage:placeholder options:options progress:nil completed:completedBlock];
}

tableview 的headview里的方法

- (void)setIconImageURLString:(NSString *)iconImageURLString {
[self.iconView sd_setImageWithURL:[NSURL URLWithString:iconImageURLString] placeholderImage:[UIImage imageNamed:@"placeholderImage"] options:SDWebImageRefreshCached completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {

if (error) {
NSLog(@"====%@",error);
}
NSLog(@"%@===%@",image,imageURL);
//把新图片保存到沙盒
[self saveIconImageToDocument:image withName:@"newIconImage.jpeg"];
}];
}

//头像保存到本地
- (void)saveIconImageToDocument:(UIImage *)newIconImage withName:(NSString *)newIconImageName {
NSData *imageData = UIImageJPEGRepresentation(newIconImage, 0.5);
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:newIconImageName];
[imageData writeToFile:fullPath atomically:NO];
}

tableview控制器里的代码

/*************************更换头像从相册还是相机选择*******************************/
#pragma mark - 跳转到更换头像界面
- (void)changeIcon:(NSNotification *)notification {
UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"更换头像" message:nil preferredStyle:UIAlertControllerStyleActionSheet];

UIImagePickerController *imagePickerVc = [[UIImagePickerController alloc] init];
imagePickerVc.delegate = self;
imagePickerVc.allowsEditing = YES;

UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"从相册选择照片" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
imagePickerVc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:imagePickerVc animated:YES completion:nil];
}];
UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
imagePickerVc.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:imagePickerVc animated:YES completion:nil];
}];

UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];

[alertC addAction:albumAction];
[alertC addAction:c
117a0
ameraAction];
[alertC addAction:cancel];
[self presentViewController:alertC animated:YES completion:nil];
}
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
/*************************更换头像*******************************/

//选择图片后,更换头像,并保存到沙盒,上传到服务器
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary
*)info {
UIImage *newIconImage = [info objectForKey:UIImagePickerControllerEditedImage];
self.headView.iconImage = newIconImage;
[self saveIconImageToDocument:newIconImage withName:@"newIconImage.jpeg"];
//    [self updateIconImage:newIconImage];
[self dismissModalViewControllerAnimated:YES];
}

2.后台没有提供下载头像的URL,而是提供了头像图片的二进制数据

从服务器获取头像

// MARK: 下载头像
- (void)downloadIconImage {
// 1.网络请求管理者
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
// 让AFN返回原始的二进制数据,我们自己来解析
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
NSString *URLString = [NSString stringWithFormat:@"%@",BaseURLString];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:URLString]];

NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
// 在这个代码块里面指定文件下载完成之后的缓存路径,指定好了之后,会自动的剪切到completionHandler里面
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"newIconImage.jpg"];
NSURL *pathURL = [NSURL fileURLWithPath:fullPath];
return pathURL;
} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
//下载完后,从Documents里获取头像,并显示
NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *newIconImagePath = [documents stringByAppendingPathComponent:@"newIconImage.jpg"];
UIImage *newIconImage = [UIImage imageWithContentsOfFile:newIconImagePath];
self.headView.iconImage = newIconImage;
}];
[downloadTask resume];
}

上传头像到服务器

//MARK: 上传头像到服务器
- (void)updateIconImage:(UIImage *)newIconImage  {

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

NSString *URLString = [NSString stringWithFormat:@"%@",BaseURLString];

// file---存到服务器里的字段--// 文件上传的文本信息
NSDictionary *parameters = @{
@"file":@"newIconImage.jpg",
};

[manager POST:URLString parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *path = [documents stringByAppendingPathComponent:@"newIconImage.jpg"];
NSData *data = [NSData dataWithContentsOfFile:path];
// formData : 用于拼接文件上传时的表单数据
[formData appendPartWithFileData:data name:@"file" fileName:@"newIconImage.jpg" mimeType:@"image/jpeg"];
} progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

ZYLog(@"%@",responseObject);
NSString *result = responseObject[@"result"];
if ([result isEqualToString:@"success"]) {
[self sendUIAlertControllerWithTitle:@"更换的头像成功上传到服务器" message:nil];
[self saveIconImageToDocument:newIconImage withName:@"newIconImage.jpg"];
}else if ([result isEqualToString:@"not_login_in"]) {
[self sendUIAlertControllerWithTitle:@"用户未登录,请登录后再操作" message:nil];
}else if ([result isEqualToString:@"isNotMultipart"]) {
[self sendUIAlertControllerWithTitle:@"文件格式有误,请选择图片上传" message:nil];
}
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
[self sendUIAlertControllerWithTitle:@"网络延迟,更换头像失败" message:@"请检查网络后重新尝试"];
}];
}
//头像保存到本地
- (void)saveIconImageToDocument:(UIImage *)newIconImage withName:(NSString *)newIconImageName {
NSData *imageData = UIImageJPEGRepresentation(newIconImage, 0.5);
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:newIconImageName];
[imageData writeToFile:fullPath atomically:NO];
}

headview拿到头像赋值

- (void)setIconImage:(UIImage *)iconImage {
_iconImage = iconImage;
NSData *imageData = UIImageJPEGRepresentation(iconImage, 0.5);
UIImage *smallImage = [UIImage imageWithData:imageData];
self.iconView.image = smallImage;
self.baseView.image = smallImage;
}

// MARK: 自定义弹框
- (void)sendUIAlertControllerWithTitle:(NSString *)title message:(NSString *)message {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alert animated:YES completion:^{
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[alert dismissViewControllerAnimated:YES completion:nil];
});
}];
}