系统自带分享功能

```

//1. 判断平台是否可用

if (![SLComposeViewController isAvailableForServiceType:SLServiceTypeSinaWeibo]) {

NSLog(@"查看是否设置新浪微博账号，设置界面－新浪微博－配置账号");

}

// 2. 创建SLComposeViewController

SLComposeViewController *composeVC = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeSinaWeibo];

// 2.1  添加文字分享

[composeVC setInitialText:@"做人如果没有梦想，跟咸鱼有什么区别"];

// 2.2 添加分享图片

[composeVC addImage:[UIImage imageNamed:@"xingxing"]];

// 3.  弹出分享界面

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

composeVC.completionHandler = ^ (SLComposeViewControllerResult result) {

if (result == SLComposeViewControllerResultCancelled) {

NSLog(@"用户点击了取消");

} else {

NSLog(@"用户点击了发送");

}

};

```