objective-c - 使用UIImage作为@“picture”共享Facebook对话框

Question

这是简单的代码

UIImage *ScreenShot = [self getScreenshot];

NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               @"Name", @"name",
                               @"Caption.", @"caption",
                               @"Description.", @"description",
                               @"www.example.com", @"link",
                               ScreenShot, @"picture",               
                               nil];

[ facebook dialog:@"feed"
                  andParams:params
                andDelegate:self];

当我编译它时收到此消息

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImage length]: unrecognized selector sent to instance 0x1288bb90' *** First throw call stack:

Answer 1

您无法将图像直接上传到墙上，而在发布到墙上时，您只能将图像链接到墙上。
因此，您需要先将UIImage上传到某个地方。您有2个选择:

上传到您的/某些服务器并发布链接到该服务器的墙贴。

上传到Facebook相册。检查有关此操作的graph API，这很简单