我之前发布了这个问题，但最终实现了这个功能。
TWTRComposer仍然不支持添加除图像以外的任何内容，因此我使用了建议的media/upload REST API。 我能够发布GIF和视频推文。 在发布媒体之前，我创建了一个自定义的UIAlertView，让用户撰写推文：
当用户点击推文按钮时，如果GIF文件大小足够小，则会发布GIF；否则，将会发布视频。
生成的GIF推文：
https://twitter.com/spinturntable/status/730609962817294336
生成的视频推文：
https://twitter.com/spinturntable/status/730609829128081408
下面是我实现此功能的方式（非常感谢这篇文章的帮助
https://dev59.com/EV0Z5IYBdhLWcg3wnBZS#31259870）。
创建用于撰写推文消息的初始UIAlertView：
-(IBAction)tweet:(id)sender{
if([[Twitter sharedInstance] session]){
UIAlertView *tweetAlert = [[UIAlertView alloc] initWithTitle:@"Compose Tweet"
message:nil
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:nil];
tweetAlert.tag = TAG_TWEET;
tweetTextView = [UITextView new];
[tweetTextView setBackgroundColor:[UIColor clearColor]];
CGRect frame = tweetTextView.frame;
frame.size.height = 500;
tweetTextView.frame = frame;
[tweetTextView setFont:[UIFont systemFontOfSize:15]];
tweetTextView.textContainerInset = UIEdgeInsetsMake(0, 10, 10, 10);
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(limitTextView:) name:@"UITextViewTextDidChangeNotification" object:tweetTextView];
[tweetTextView setText:[NSString stringWithFormat:@"%@ %@", [[NSUserDefaults standardUserDefaults] valueForKey:@"tweetText"], self.setShareURL]];
[tweetAlert setValue:tweetTextView forKey:@"accessoryView"];
[tweetAlert addButtonWithTitle:@"Tweet"];
[tweetAlert show];
}else{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil
message:@"Please log in with your Twitter account to tweet!"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
}
然后检测UIAlertView Tweet（我添加了一个UIAlertViewDelegate）：
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if(alertView.tag == TAG_TWEET){
if (buttonIndex == 1) {
UIAlertView *tweetStartAlert = [[UIAlertView alloc] initWithTitle:nil
message:@"Tweeting..."
delegate:self
cancelButtonTitle:nil
otherButtonTitles:nil];
[tweetStartAlert show];
__block TWTRAPIClient *client = [[Twitter sharedInstance] APIClient];
__block NSString *mediaID;
NSString *text = [tweetTextView text];
NSLog(@"text: %@", text);
NSData *mediaData;
NSString *mediaLength;
NSString *mediaType;
NSString* url = @"https://upload.twitter.com/1.1/media/upload.json";
if([self.setSpins count] ==1){
NSLog(@"tweeting GIF with url %@", self.gifURL);
mediaData = [NSData dataWithContentsOfURL:[NSURL URLWithString:self.gifURL]];
mediaLength = [NSString stringWithFormat:@"%lu", mediaData.length];
mediaType = @"image/gif";
}else if([self.setSpins count] > 1){
NSLog(@"tweeting video with url %@", self.videoURL);
mediaData = [NSData dataWithContentsOfURL:[NSURL URLWithString:self.videoURL]];
mediaLength = [NSString stringWithFormat:@"%lu", mediaData.length];
mediaType = @"video/mp4";
}
NSError *error;
__block NSDictionary *message = @{ @"status":text,
@"command":@"INIT",
@"media_type":mediaType,
@"total_bytes":mediaLength};
NSURLRequest *preparedRequest = [client URLRequestWithMethod:@"POST" URL:url parameters:message error:&error];
[client sendTwitterRequest:preparedRequest completion:^(NSURLResponse *urlResponse, NSData *responseData, NSError *error){
if(!error){
NSError *jsonError;
NSDictionary *json = [NSJSONSerialization
JSONObjectWithData:responseData
options:0
error:&jsonError];
mediaID = [json objectForKey:@"media_id_string"];
NSError *error;
NSString *mediaString = [mediaData base64EncodedStringWithOptions:0];
message = @{@"command" : @"APPEND",
@"media_id" : mediaID,
@"segment_index" : @"0",
@"media" : mediaString};
NSURLRequest *preparedRequest = [client URLRequestWithMethod:@"POST" URL:url parameters:message error:&error];
[client sendTwitterRequest:preparedRequest completion:^(NSURLResponse *urlResponse, NSData *responseData, NSError *error){
if(!error){
client = [[Twitter sharedInstance] APIClient];
NSError *error;
message = @{@"command" : @"FINALIZE",
@"media_id" : mediaID};
NSURLRequest *preparedRequest = [client URLRequestWithMethod:@"POST" URL:url parameters:message error:&error];
[client sendTwitterRequest:preparedRequest completion:^(NSURLResponse *urlResponse, NSData *responseData, NSError *error){
if(!error){
client = [[Twitter sharedInstance] APIClient];
NSError *error;
NSLog(@"publish video!");
NSString *url = @"https://api.twitter.com/1.1/statuses/update.json";
NSMutableDictionary *message = [[NSMutableDictionary alloc] initWithObjectsAndKeys:text,@"status",@"true",@"wrap_links",mediaID, @"media_ids", nil];
NSURLRequest *preparedRequest = [client URLRequestWithMethod:@"POST" URL:url parameters:message error:&error];
[client sendTwitterRequest:preparedRequest completion:^(NSURLResponse *urlResponse, NSData *responseData, NSError *error){
if(!error){
NSError *jsonError;
NSDictionary *json = [NSJSONSerialization
JSONObjectWithData:responseData
options:0
error:&jsonError];
NSLog(@"%@", json);
[tweetStartAlert dismissWithClickedButtonIndex:0 animated:YES];
UIAlertView *tweetFinishedAlert = [[UIAlertView alloc] initWithTitle:nil
message:@"Tweeted!"
delegate:self
cancelButtonTitle:nil
otherButtonTitles:nil];
[tweetFinishedAlert show];
double delayInSeconds = 1.5;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
[tweetFinishedAlert dismissWithClickedButtonIndex:0 animated:YES];
});
[self logShare:@"twitter"];
}else{
NSLog(@"Error: %@", error);
}
}];
}else{
NSLog(@"Error command FINALIZE: %@", error);
}
}];
}else{
NSLog(@"Error command APPEND: %@", error);
}
}];
}else{
NSLog(@"Error command INIT: %@", error);
}
}];
}
}
}
一些额外的事情：当“发推文提示框”出现时，我将焦点集中在UITextView上：
- (void)didPresentAlertView:(UIAlertView *)alertView {
if(alertView.tag == TAG_TWEET){
NSLog(@"tweetAlertView appeared");
[tweetTextView becomeFirstResponder];
}
}
这是我检查UITextView是否少于140个字符的方法：
- (void)limitTextView:(NSNotification *)note {
int limit = 140;
if ([[tweetTextView text] length] > limit) {
[tweetTextView setText:[[tweetTextView text] substringToIndex:limit]];
}
}
希望这对其他人有用，因为我花了很长时间才把一切东西拼凑在一起。
