头像。
1.从相册or照相获取图片
2.把图片保存到沙盒Document。把图片转成二进制数据流上传到服务器。
3.将Document中的图片路径存到偏好设置。（使用user_id来标识不同的头像路径）
//从相册中选取图片或拍照
- (void)btnActionForEditPortrait:(id) sender {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.allowsEditing = YES;
[self presentViewController:picker animated:YES completion:NULL];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
_avatar = info[UIImagePickerControllerOriginalImage];
[self saveImage:_avatar WithName:@"userAvatar"];
//处理完毕，回到个人信息页面
[picker dismissViewControllerAnimated:YES completion:NULL];
[_tableView reloadData];
}
//保存图片
- (void)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName
{
NSData* imageData = UIImagePNGRepresentation(tempImage);
NSString* documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* totalPath = [documentPath stringByAppendingPathComponent:imageName];
//保存到 document
[imageData writeToFile:totalPath atomically:NO];
//保存到 NSUserDefaults
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:totalPath forKey:@"avatar"];
//上传服务器
[[HSLoginClass new] uploadAvatar:totalPath];
}
//从document取得图片
- (UIImage *)getImage:(NSString *)urlStr
{
return [UIImage imageWithContentsOfFile:urlStr];
}
Paste_Image.png
Paste_Image.png
----------------------NSJsonSerialization
json转为OC
-(void) loadJsonData:(NSURL *)url
{
dispatch_async(kGlobalQueue, ^{
NSData *data = [NSData dataWithContentsOfURL:url];
[self performSelectorOnMainThread:@selector(parseJsonData:) withObject:data waitUntilDone:NO];
});
}
-(void) parseJsonData:(NSData *)data
{
NSError *error;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (json == nil) {
NSLog(@"json parse failed \r\n");
return;
}
NSArray *songArray = [json objectForKey:@"song"];
NSLog(@"song collection: %@\r\n",songArray);
_song = songArray;
self.songIndex = 0;
NSDictionary *song = [songArray objectAtIndex:0];
NSLog(@"song info: %@\t\n",song);
}
json（字典、数组） -- > 二进制流数据（json）
NSDictionary *song = [NSDictionary dictionaryWithObjectsAndKeys:@"i can fly",@"title",@"4012",@"length",@"Tom",@"Singer", nil];
if ([NSJSONSerialization isValidJSONObject:song])
{
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:song options:NSJSONWritingPrettyPrinted error:&error];
NSString *json =[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(@"json data:%@",json);
}
