> ## Documentation Index
> Fetch the complete documentation index at: https://docs.duix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Code example

> Objective-C code example demonstrating how to initialize, start, and handle errors using the Duix iOS SDK.

## Overview

The following Objective-C example demonstrates the basic workflow for integrating the **Duix iOS SDK**,\
including initialization, session management, view setup, and error handling.\
For the complete implementation, see the full demo project:\
👉 [**duix-cloud-demo-ios\_1.2.6.zip**](https://duix-sgp.obs.ap-southeast-3.myhuaweicloud.com/duix/sdk/duix-cloud-demo-ios_1.2.6.zip)

***

## Full Example

```objective-c theme={null}
/// Assign a custom view for digital human rendering
[DigitalManager manager].remote_view = self.customView;

#pragma mark - SDK Initialization
[[GJAccess manager] getCamerapermissions:^(bool isPermis) {
    if (isPermis)  {
        [[DigitalManager manager] initNewWithAppId:AppId
                                             appKey:AppKey
                                      conversationId:ConversationId
                                              region:REGION
                                               block:^(BOOL isSuccee, NSString *errorMsg) {
            if (isSuccee) {
                [[DigitalManager manager] toStart];  // Start digital human session
            } else {
                NSLog(@"GJDigitalDemo==errorMsg==%@", errorMsg);
            }
        }];
    }
}];

#pragma mark - End Conversation
- (void)toStop {
    self.digitalShow = NO;                      // Hide the digital human
    [[DigitalManager manager] toStop];          // Stop the active session
}

#pragma mark - SDK Delegate (DigitalViewDelegate)
#pragma mark - Video Load Completion
- (void)onVideoShow:(BOOL)isSuccess progress:(float)progress {
    if (isSuccess) {
        self.digitalShow = YES;
        NSLog(@"GJDigitalDemo==Load Complete");
    } else {
        NSLog(@"GJDigitalDemo==Loading Progress: %lf", progress);
    }
}

#pragma mark - Error Handling
- (void)onError:(NSInteger)error_code errorMsg:(NSString *)errorMsg {
    // Handle specific error codes
    switch (error_code) {
        case -1:
        case -2:
            // MQTT connection issues
            break;
        case 50001:
            // Invalid or empty AppId
            break;
        case 50002:
            // Resource check failed (contact administrator)
            break;
        case 50003:
            // Resource occupied; please check and retry
            break;
        case 50004:
            // Human request timeout
            break;
        case 50005:
            // Error retrieving resources from group
            break;
        case 50006:
            // Signature verification failed
            break;
        case 50007:
            // Insufficient total concurrency of resources
            break;
        case 50009:
            // Resource timeout or not configured
            break;
        default:
            // Unknown error
            break;
    }
    NSLog(@"GJDigitalDemo==errorMsg==%@", errorMsg);
}
```