环信即时通信iOS版如何实现消息提醒？
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UIBackgroundModes
remote-notification
```
2. 创建本地通知
在消息接收回调中，创建本地通知：
```objective-c
// 创建通知内容
UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
content.title = @"消息提醒";
content.body = @"您有一条新消息！";
// 创建通知请求
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"messageNotification" content:content trigger:nil];
// 添加通知请求到通知中心
[[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(UNNotificationPresentationOptions error) {
if (error) {
// 处理错误
}
}];
```
3. 设置本地通知响铃和震动
在创建本地通知时，可以设置通知的响铃和震动：
```objective-c
UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
center.delegate = self;
UNNotificationSettings *settings = [center notificationSettingsForIdentifier:@"messageNotification"];
if (!settings) {
settings = [[UNNotificationSettings alloc] init];
settings.sound = [UNNotificationSound defaultSound];
settings.badge = YES;
settings.alertBody = YES;
settings.sound = [UNNotificationSound defaultSound];
settings.sound = [UNNotificationSound defaultSound];
[center setNotificationSettings:settings];
}
```
二、推送通知
1. 注册推送通知
在Xcode项目中，需要在Info.plist文件中添加推送通知权限：
```
UIBackgroundModes
remote-notification
```
在iOS 10及以上版本，还需要在Xcode项目中添加推送通知描述文件：
```
aps-environment
production
aps-product-id
com.yourapp.product-id
aps-bundle-id
com.yourapp.bundle-id
aps-sandbox
```
2. 配置推送服务器
在推送服务器中，配置推送证书和描述文件，并设置推送内容。
3. 发送推送通知
在推送服务器中，使用推送API发送推送通知。以下是一个示例：
```objective-c
NSString *deviceToken = @"推送证书中的deviceToken";
NSMutableDictionary *payload = [NSMutableDictionary dictionary];
[payload setObject:@"消息内容" forKey:@"alert"];
[payload setObject:@"消息标题" forKey:@"title"];
[payload setObject:@"com.yourapp" forKey:@"bundleId"];
[payload setObject:@"消息ID" forKey:@"id"];
[payload setObject:@"消息类型" forKey:@"type"];
NSData *data = [NSJSONSerialization dataWithJSONObject:payload options:NSJSONWritingPrettyPrinted error:nil];
NSData *encryptedData = [self encryptData:data];
NSData *payloadData = [NSData dataWithBytes:encryptedData length:[encryptedData length]];
NSData *pushData = [NSData dataWithBytes:[deviceToken UTF8String] length:[deviceToken length]];
NSData *combinedData = [NSData dataWithBytesNoCopy:[[NSData alloc] initWithBytes:pushData.bytes length:pushData.length] freeWhenDone:NO];
[combinedData appendBytes:payloadData.bytes length:payloadData.length];
[APNSClient pushNotification:combinedData toDeviceToken:deviceToken];
```
4. 接收推送通知
在App中，监听推送通知的接收回调：
```objective-c
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
// 处理推送通知
completionHandler(UIBackgroundFetchResultNewData);
}
```
三、自定义提醒
1. 使用第三方库
可以使用第三方库，如Localize，实现自定义提醒。在项目中添加Localize库，然后在消息接收回调中，设置提醒内容：
```objective-c
Localize *localize = [Localize sharedLocalize];
[localize scheduleNotificationWithMessage:@"您有一条新消息！" title:@"消息提醒" badge:1 fireDate:nil repeats:NO userInfo:nil];
```
2. 使用自定义提醒类
创建一个自定义提醒类，封装提醒功能：
```objective-c
@interface LocalNotification : NSObject
+ (void)scheduleNotificationWithMessage:(NSString *)message title:(NSString *)title badge:(NSInteger)badge fireDate:(NSDate *)fireDate repeats:(BOOL)repeats userInfo:(NSDictionary *)userInfo;
@end
@implementation LocalNotification
+ (void)scheduleNotificationWithMessage:(NSString *)message title:(NSString *)title badge:(NSInteger)badge fireDate:(NSDate *)fireDate repeats:(BOOL)repeats userInfo:(NSDictionary *)userInfo {
UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
content.title = title;
content.body = message;
content.badge = @(badge);
content.userInfo = userInfo;
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"localNotification" content:content trigger:nil];
[[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(UNNotificationPresentationOptions error) {
if (error) {
// 处理错误
}
}];
}
@end
```
在消息接收回调中，调用自定义提醒类：
```objective-c
[LocalNotification scheduleNotificationWithMessage:@"您有一条新消息！" title:@"消息提醒" badge:1 fireDate:nil repeats:NO userInfo:nil];
```
通过以上方法，可以轻松实现环信即时通信iOS版的消息提醒功能。开发者可以根据实际需求，选择合适的实现方式，提升用户体验。