如何在预览子视图中显示所选贴纸（图像）？
我一直致力于可以发送贴纸的聊天应用。到目前为止我所做的是当我点击贴纸视图上的贴纸时，所选贴纸将立即发送到聊天室。现在我被要求添加stickerPreviewView，当我点击贴纸时弹出它，所选贴纸将显示在stickerPreviewView上，首先等待用户响应。如果用户点击选定的贴纸（带有贴纸图像的UIButton），它将被发送到聊天室。我的问题是我如何能够做到这一点，以下相关代码主要显示如何将贴纸发送到聊天室。
InputFunctionView
// This method called when I tap on a sticker
- (void)selectedSticker:(NSString *)stickerURLString {
gstickerURLString = stickerURLString; // Added by Sanit - Pass on stickerURLString to global variable
// Added by Sanit - Initialize StickerPreviewView
_stickerPreviewView = [[UIImageView alloc] initWithFrame:CGRectMake(0, +180, FrameWidth, 120)];
_stickerPreviewView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5f];
_stickerPreviewView.userInteractionEnabled = YES;
[self.superview addSubview:_stickerPreviewView]; // Added by Sanit - Use superview to add subview StickerPreviewView; using self to add the subview not working ?
// Added by Sanit - Initialize PreviewCancelButton
self.previewCancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.previewCancelButton.frame = CGRectMake(Main_Screen_Width-30, SpaceForItems, 25, 25);
[self.previewCancelButton setBackgroundImage:[UIImage imageNamed:@"btn_previewcancel.png"] forState:UIControlStateNormal];
[self.previewCancelButton setBackgroundImage:[UIImage imageNamed:@"btn_previewcancel.png"] forState:UIControlStateHighlighted];
[_stickerPreviewView addSubview: self.previewCancelButton];
[self.previewCancelButton addTarget:self action:@selector(cancelStickerPreviewButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
// Added by Sanit - Initialize StickerPreviewButton
self.stickerPreviewButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.stickerPreviewButton.frame = CGRectMake(Main_Screen_Width/2, SpaceForItems, 60, 60);
[_stickerPreviewView addSubview: self.stickerPreviewButton];
[self.stickerPreviewButton addTarget:self action:@selector(sendStickerPreviewButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; // Added by Sanit - StickerPreviewButton fires action
// How to add selected sticker to display on stickerPreviewView?
//??? Call method to show sticker on StickerPreviewView here - How?
}
// Added by Sanit - Method when cancelStickerPreviewButton pressed
- (void)cancelStickerPreviewButtonPressed:(id)sender {
NSLog(@"cancel sticker preview");
[self.previewCancelButton removeFromSuperview];
[_stickerPreviewView removeFromSuperview];
}
// Added by Sanit - Method called when StickerPreviewButton pressed
- (void)sendStickerPreviewButtonPressed: (UIButton *)sender {
[self.delegate InputFunctionView:self sendSticker:gstickerURLString]; // Added by Sanit - Send off sticker to chatroom
[self cancelStickerPreviewButtonPressed:nil];
}
//??? Added by Sanit - Method to show sticker on StickerPreviewView - How?
ChatRoomVC
检查ChatRoomVC以查看它如何向聊天室发送贴纸 - 我试图复制一种方法将贴纸发送到StickerPreviewView但不是那么简单，我需要帮助。
- (void)InputFunctionView:(InputFunctionView *)funcView sendSticker:(NSString *)stickerURLString {
NSDictionary *dic = @{@"sticker" : stickerURLString,
@"type" : @(MessageTypeSticker),
@"target" : _targetAccout,
@"topic" : _topic,
@"isGroupMessage" : @"0"};
if (_chatRoomType == ChatRoomTypeGroup) {
dic = @{@"sticker" : stickerURLString,
@"type" : @(MessageTypeSticker),
@"target" : _gid, //_targetAccout
@"topic" : _topic,
@"isGroupMessage" : @"1"};
}
[self dealTheFunctionData:dic];
[self.view endEditing:YES];
}
- (void)dealTheFunctionData:(NSDictionary *)dic {
if ([ObjectManager isConnectedToInternet] && [[MQTTManager sharedInstance].client MQTTStatus]) {
[self.chatModel addMyMessage:dic];
[self.chatTableView reloadData];
[self tableViewScrollToBottom];
} else {
if ([dic[@"type"] intValue] == 0) {
IFView.textViewInput.text = dic[@"strContent"];
}
[ObjectManager showIsConnectedToInternetFailWithDuration:1.0 inView:self.view];
}
ChatModelView
- (void)addMyMessage:(NSDictionary *)dic {
BOOL isTempMessage=false;
BOOL isUsingTempMessage=false;
/*************** MQTT ***************/
//Check message type
MessageType messageType = [dic[@"type"] integerValue];
if ([[NSString stringWithFormat:@"%@", dic[@"isGroupMessage"]] isEqualToString:@"1"]) {
_ChatRoomUserType = YES;
}
NSString *messageString;
NSString *refTempId;
//"strContent"
if (messageType == MessageTypeText) {
messageString = dic[@"strContent"];
//"picture"
} else if (messageType == MessageTypePicture) {
messageString = dic[@"picture"];
refTempId=dic[@"refTempId"];
if (refTempId!=nil) {
isUsingTempMessage=true;
NSLog(@"refTempId=%@",refTempId);
}
//"voice"
} else if (messageType == MessageTypeVoice) {
messageString = dic[@"voice"];
//"sticker"
} else if (messageType == MessageTypeSticker) {
messageString = dic[@"sticker"];
messageString = [messageString stringByReplacingOccurrencesOfString:kStickerImageURL withString:@""];
//"video"
} else if (messageType == MessageTypeVideo) {
messageString = dic[@"video"];
}
NSString *targetString = dic[@"target"];
NSString *topicString = dic[@"topic"];
NSString *tempId=[NSString stringWithFormat:@"%@",dic[@"tempId"]];
if (![tempId isEqualToString:@"(null)"]) {
NSLog(@"Temp id is not empty");
isTempMessage=true;
}
NSString *messageId = [[User sharedUser] generateDoubleMessageID];
double timeStamp = [[NSDate date] timeIntervalSince1970] * 1000;
if (!isTempMessage) {
[self sendMessageToMQTTServer:messageString Target:targetString Topic:topicString MessageType:messageType MessageId:messageId TimeStamp:timeStamp];
}
/* Layout */
NSMutableDictionary *dataDic = [NSMutableDictionary dictionaryWithDictionary:dic];
NSString *URLStr = @"http://img0.bdstatic.com/img/image/shouye/xinshouye/mingxing16.jpg";
[dataDic setObject:@(MessageFromMe) forKey:@"from"];
[dataDic setObject:[[NSDate date] description] forKey:@"strTime"];
[dataDic setObject:@"Hello,Sister" forKey:@"strName"];
[dataDic setObject:URLStr forKey:@"strIcon"];
[dataDic setObject:@"" forKey:@"strMessageStatus"];
MessageFrame *messageFrame = [[MessageFrame alloc] init];
messageFrame.isGroupMessage = _isGroupChat;
Message *message = [[Message alloc] init];
message.isSending = YES;
if (!isTempMessage) {
message.messageId = messageId;
message.isTempMessage=false;
}
else {
message.messageId = tempId;
message.isTempMessage=true;
}
message.showNotSendButton = NO;
message.delegate = _chatRoomVC;
[message setWithDict:dataDic];
if (!isTempMessage) {
NSDictionary *mqDict=@{@"Message":messageString,@"Target":targetString,@"MessageType":@(messageType),@"MessageId":messageId};
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0),^{
NSDictionary *messageDict=[Message dictionaryWithPropertiesOfObject:message];
NSLog(@"messageDict=%@",messageDict);
// Save to temp DB
NSLog(@"message object=%@",message);
NSLog(@"mqDic=%@",mqDict);
NSLog(@"messageDic=%@",messageDict);
NSString *msgId=mqDict[@"MessageId"];
NSDictionary *tempMessage=@{@"MessageId":msgId,@"Topic":topicString,@"MQDict":mqDict,@"MessageDict":messageDict,@"TimeStamp":[NSString stringWithFormat:@"%.0f",timeStamp]};
if (![[FMDBManager sharedInstance] didTempMessageExistWithMessageId:msgId]) {
[[FMDBManager sharedInstance] saveTempMessage:tempMessage];
}
});
// Use tempId
if (isUsingTempMessage) {
NSLog(@"usingTempMessage");
// Get path from tempMessage
NSLog(@"refTempId=%@",refTempId);
Message *tempMessage=[self queryMessage:refTempId];
if (tempMessage!=nil) {
// set file path of message
NSString *filePath=tempMessage.picture;
message.filePath=filePath;
}
}
}
else {
}
BOOL isShowTime = [message minuteOffSetStart:previousTime end:dataDic[@"strTime"]];
messageFrame.showTime = isShowTime;
messageFrame.showIconEnable = self.showIconEnable;
messageFrame.showSelfNameEnable = self.showSelfNameEnable;
messageFrame.showFriendsNameEnable = self.showFriendsNameEnable;
[messageFrame setMessage:message];
/*************** Layout ***************/
NSLog(@"isTempMessage=%d",isTempMessage);
if (isTempMessage) {
NSLog(@"message=%@",message);
}
if (isUsingTempMessage) {
NSLog(@"Replace temp message %@ on screen",refTempId);
[self replaceMessage:refTempId WithMessageFrame:messageFrame];
}
else {
NSLog(@"Show message on screen");
//Charles edit 8/8
MessageFrame *msgFrame = self.dataSource.lastObject;
previousTime = msgFrame.timeStampStr;
[self.dataSource addObject:messageFrame];
}
}
2 个答案:
答案 0 :(得分：0)
有很多方法可以完成这项任务，但这两种方法都是专业的。
1：创建自定义委托协议并使用委托方法传递数据。
2：使用iOS块执行此任务。
您可以使用您认为简单易行的任何方法。
答案 1 :(得分：0)
当方法接收输入为NSString时，我发现下面的内容可以使用字符串为stickerPreviewButton设置图像：
[self.stickerPreviewButton setImageForState:UIControlStateNormal withURL:[NSURL URLWithString:stickerURLString]];
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