In the “0152 Displaying text-based thread messages” segment, the presenter illustrates how to code the presentation of text messages within a thread in the thread details view controller. Although the thread and messages exist, they are not yet visible. To remedy this, the presenter introduces a new function called “loadMessages” to render them. This function systematically traverses all messages within the thread, verifying whether each one is a text message and ensuring the text content is not empty. If these conditions are met, a new label is instantiated, incorporating the text, and subsequently appended to the scroll view with defined dimensions and offsets. Throughout this process, the presenter addresses a concern regarding the current vertical offset by initializing a variable to 0.0 to preempt any issues. Notably, the handling of text messages containing empty content is not covered in this segment, with the subsequent tutorial slated to tackle the management of image messages.
In the “0153 Implementing image-based thread messages” video segment, the presenter illustrates the integration of image messages into a thread subsequent to the introduction of text messages. The process commences with the removal of an existing load message function and the addition of a new one. Following this, an if statement is incorporated to verify the presence of an image path, facilitating the loading of the image via UIImageContentOfFile. A novel image view is instantiated to showcase the image, with its dimensions adjusted in accordance with the scroll view’s parameters. Subsequently, the image view is appended to the scroll view, and adjustments are made to the scroll view’s offset and size to ensure consistent spacing between messages. Concluding the segment, the presenter hints at forthcoming sections where code for message addition will be implemented, along with plans to introduce mock data for demonstrative purposes.
In the “0154 Implementing image messages in threads – Part 2” video, the presenter elucidates the process of integrating images into thread messages. They tackle an issue by introducing an if statement to handle nil images and employ the thread manager’s save image function to store the image with a file name derived from the message’s UUID. Subsequently, the speaker adds the new message containing both text and image to the thread manager and illustrates the addition of messages with images to the thread’s beginning for testing purposes. Additionally, they delve into the concept of encoding image data as Base64 text and embedding it into the text message as a data URL to facilitate efficient transmission and reception of image messages within a thread, eliminating the need for supplementary file transfers. An example utilizing Swift is provided to elucidate the process further.