Ios “错误”;选择器'的类方法未知;canSendTweet';
我正在尝试设置一个tweet按钮。我所有的代码似乎都正常工作,除了它给了我一个错误“选择器‘canSendTweet’没有已知的类方法”有什么建议吗Ios “错误”;选择器'的类方法未知;canSendTweet';,ios,objective-c,twitter,Ios,Objective C,Twitter,我正在尝试设置一个tweet按钮。我所有的代码似乎都正常工作,除了它给了我一个错误“选择器‘canSendTweet’没有已知的类方法”有什么建议吗 - (IBAction)tweetTapped:(id)sender { //Check if the device can send tweets if ([SLComposeViewController canSendTweet]) { //Create tweet sheet and set initial text SLCom
- (IBAction)tweetTapped:(id)sender
{
//Check if the device can send tweets
if ([SLComposeViewController canSendTweet])
{
//Create tweet sheet and set initial text
SLComposeViewController *tweetSheet =
[[SLComposeViewController alloc] init];
[tweetSheet setInitialText:@"this is a tweet from my app"];
[tweetSheet addURL:[NSURL URLWithString:@"http://www.iosdeveloperguide.com"]];
//show tweet sheet
[self presentViewController:tweetSheet animated:YES completion:nil];
}
else
{
//Device can not tweet. Show error Notification.
UIAlertView *alertview = [[UIAlertView alloc]
initWithTitle:@"Unable to Tweet"
message:@"Please ensure that you have at least one Twitter account setup and have internet connectivity"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertview show];
}
}
@end
对于类
SLComposeViewController
,没有名为canSendTweet
的类方法。快速查看参考文档(您应该这样做)会发现您想要的是:
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) {
// can send a tweet
}
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) {
// can send a tweet
}
这是来自Twitter.framework的方法(您必须导入此框架)
您可以在Social.framework中使用此方法来检查“用户可以tweet吗?”
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) {
// can send a tweet
}