最近搞環信聊天，需求是游客身份也可以進行聊天，當用戶注冊了我們的APP后也需要把游客身份切換過來進行聊天，首先我們的環信注冊，登錄全都放前段處理了，下面就按照我們的需求邏輯來如何切換游客
1.APP用戶的注冊，也就注冊環信，APP的登錄返回的有用戶ID，這個時候并沒有讓他登錄環信，只是保存了返回的ID，下面就是用ID來判斷該用戶是否注冊過環信的依據
下面用圖來表示：
下面就上代碼了，第一步從圖中第一步來說判斷userID是否存在
這個地方是在點擊聊天按鈕開始判斷的
-(void)releaseInfo:(UIButton*)sender{
NSString*Hxusername=[userdic objectForKey:@"useid"];//獲取保存的userID
NSString*phonestr=? [[NSUserDefaults standardUserDefaults]objectForKey:@"phonenum"];
NSString*chatid=[[phonestr md5String]substringFromIndex:16];//這個是獲取客服的歡信ID
//單例里面處理用戶是否登錄，以及游客隨機分配uuid來注冊環信IM號
DataManager*datamage= [DataManager shareDataManager];
//判斷用戶ID是否存在，也就證明是否注冊過環信
if (Hxusername.length>0) {
if ([datamage loginKefuSDK])//判斷用戶是否登錄
{//單聊
ChattingViewController *chatController = [[ChattingViewController alloc] initWithConversationChatter:chatid conversationType:EMConversationTypeChat];[self.navigationController pushViewController:chatController animated:YES];
}
}else{
//游客身份的判斷
if ([datamage customelogin]) {
//單聊
ChattingViewController *chatController = [[ChattingViewController alloc] initWithConversationChatter:chatid conversationType:EMConversationTypeChat];[self.navigationController pushViewController:chatController animated:YES];
}
}
}上面這是按鈕方法里面的數據下面來說，DataManager*datamage= [DataManager shareDataManager];這個單利的方法
DataManager.h
@interface DataManager : NSObject
-(BOOL)customelogin;//判斷游客之前是否有登錄
-(void)requestchattphone;//獲取美容院客服聊天的對象電話
@end
DataManager.m
@implementation DataManager
+(instancetype)shareDataManager{
static DataManager *manager;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
manager = [[DataManager alloc] init];
});
return manager;
}
//userID存在的時候 登錄IM
- (BOOL)loginKefuSDK {
NSDictionary*userdic=[[NSUserDefaults standardUserDefaults]objectForKey:@"userMessage"];//接受用戶是否登錄
NSString*loguser=[NSString stringWithFormat:@"%@",[userdic objectForKey:@"useid"] ];
EMClient *client = [EMClient sharedClient];
//用戶已經登錄
if (client.isLoggedIn) {
if ([loguser isEqualToString:client.currentUsername])//當前登錄用戶的ID和即將要登錄人的ID是否一樣
{
return YES;
}else
{
EMError *error = [[EMClient sharedClient] logout:YES];
if (!error) {
NSLog(@"退出成功");
}
}
}//這里APP用戶登錄環信的密碼統統是123456
EMError *error = [[EMClient sharedClient] loginWithUsername:loguser password:@"123456"];
if (!error) { //IM登錄成功
return YES;
} else { //登錄失敗
NSLog(@"登錄失敗 error code :%d,error description:%@",error.code,error.errorDescription);
return NO;
}
return NO;
}
//游客身份的登錄方法
-(BOOL)customelogin
{
EMClient *client = [EMClient sharedClient];
//用戶已經登錄
if (client.isLoggedIn) {
return YES;
}//該用戶沒有注冊，來用改設備UUID來給用戶注冊環信，并登錄環信
if (![self registerIMuser]) {
return NO;
}
EMError *error = [[EMClient sharedClient] loginWithUsername:self.Hxusername password:@"123456"];
if (!error) { //IM登錄成功
return YES;
} else { //登錄失敗
NSLog(@"登錄失敗 error code :%d,error description:%@",error.code,error.errorDescription);
return NO;
}
return NO;
}
- (BOOL)registerIMuser { //舉個栗子。注冊建議在服務端創建環信id與自己app的賬號一一對應，\
而不要放到APP中，可以在登錄自己APP時從返回的結果中獲取環信賬號再登錄環信服務器
EMError *error = nil;
NSString *newUser = [self getrandomUsername];
self.Hxusername = newUser;
error = [[EMClient sharedClient] registerWithUsername:newUser password:@"123456"];
if (error &&? error.code != EMErrorUserAlreadyExist) {
NSLog(@"注冊失敗;error code：%d,error description :%@",error.code,error.errorDescription);
return NO;
}return YES;
}
//創建一個隨機的用戶名，這里是設備UUID來代替的
- (NSString *)getrandomUsername {
//第一種方法：
/*NSString *username = nil;
UIDevice *device = [UIDevice currentDevice];//創建設備對象
NSString *deviceUID = [[NSString alloc] initWithString:[[device identifierForVendor] UUIDString]];
if ([deviceUID length] == 0) {
CFUUIDRef uuid = CFUUIDCreate(NULL);
if (uuid)
{
deviceUID = (__bridge_transfer NSString *)CFUUIDCreateString(NULL, uuid);
CFRelease(uuid);
}
username = [deviceUID stringByReplacingOccurrencesOfString:@"-" withString:@""];
username = [username stringByAppendingString:[NSString stringWithFormat:@"%u",arc4random()%100000]];
return username;*/
//第二種方法
//加上build ID是為了保證設備的唯一性，如果這里的buildID換了，設備的uuid也會變，這里的解決辦法也就是放倒了鑰匙串里面，不會因卸載程序，程序升級設備的標識會改變
NSString *SERVICE_NAME = NAVI_TEST_BUNDLE_ID;//最好用程序的bundle id
NSString * str =? [SFHFKeychainUtils getPasswordForUsername:@"UUID" andServiceName:SERVICE_NAME error:nil];? // 從keychain獲取數據
if ([str length]<=0)
{
str? = [[[UIDevice currentDevice] identifierForVendor] UUIDString];? // 保存UUID作為手機唯一標識符[SFHFKeychainUtils storeUsername:@"UUID" ? andPassword:str ? ?forServiceName:SERVICE_NAME?updateExisting:1 ?error:nil];? // 往keychain添加數據
}
str = [str stringByReplacingOccurrencesOfString:@"-" withString:@""];
return str;
}在這里用到了一個類來處理的UUID不變（APP卸載后不會改變）
SFHFKeychainUtils.h
#import@interface SFHFKeychainUtils : NSObject
+ (NSString *) getPasswordForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error;
+ (BOOL) storeUsername: (NSString *) username andPassword: (NSString *) password forServiceName: (NSString *) serviceName updateExisting: (BOOL) updateExisting error: (NSError **) error;
+ (BOOL) deleteItemForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error;
@end
SFHFKeychainUtils.m
#import "SFHFKeychainUtils.h"
static NSString *SFHFKeychainUtilsErrorDomain = @"SFHFKeychainUtilsErrorDomain";
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 30000 && TARGET_IPHONE_SIMULATOR
@interface SFHFKeychainUtils (PrivateMethods)
+ (SecKeychainItemRef) getKeychainItemReferenceForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error;
@end
#endif
@implementation SFHFKeychainUtils
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 30000 && TARGET_IPHONE_SIMULATOR
+ (NSString *) getPasswordForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error { if (!username || !serviceName) { *error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -2000 userInfo: nil]; return nil; }? ? ? SecKeychainItemRef item = [SFHFKeychainUtils getKeychainItemReferenceForUsername: username andServiceName: serviceName error: error];? ? ? if (*error || !item) { return nil; }
// from Advanced Mac OS X Programming, ch. 16
UInt32 length;
char *password;
SecKeychainAttribute attributes[8];
SecKeychainAttributeList list;
attributes[0].tag = kSecAccountItemAttr;
attributes[1].tag = kSecDescriptionItemAttr;
attributes[2].tag = kSecLabelItemAttr;
attributes[3].tag = kSecModDateItemAttr;
list.count = 4;
list.attr = attributes;
OSStatus status = SecKeychainItemCopyContent(item, NULL, &list, &length, (void **)&password);
if (status != noErr)
{
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
return nil;
}
NSString *passwordString = nil;
if (password != NULL)
{ char passwordBuffer[1024];
if (length > 1023) {length = 1023;
}
strncpy(passwordBuffer, password, length);
passwordBuffer[length] = '\0';
passwordString = [NSString stringWithCString:passwordBuffer];
}SecKeychainItemFreeContent(&list, password);CFRelease(item);return passwordString;
}
+ (void) storeUsername: (NSString *) username andPassword: (NSString *) password forServiceName: (NSString *) serviceName updateExisting: (BOOL) updateExisting error: (NSError **) error {
if (!username || !password || !serviceName) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -2000 userInfo: nil];
return;
}
OSStatus status = noErr;
SecKeychainItemRef item = [SFHFKeychainUtils getKeychainItemReferenceForUsername: username andServiceName: serviceName error: error];
if (*error && [*error code] != noErr) {
return;
}
*error = nil;
if (item) {
status = SecKeychainItemModifyAttributesAndData(item,
NULL,
strlen([password UTF8String]),
[password UTF8String]);
CFRelease(item);
}
else {
status = SecKeychainAddGenericPassword(NULL,
strlen([serviceName UTF8String]),
[serviceName UTF8String],
strlen([username UTF8String]),
[username UTF8String],
strlen([password UTF8String]),
[password UTF8String],
NULL);
}
if (status != noErr) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
}
}
+ (void) deleteItemForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error {
if (!username || !serviceName) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: 2000 userInfo: nil];
return;
}
*error = nil;
SecKeychainItemRef item = [SFHFKeychainUtils getKeychainItemReferenceForUsername: username andServiceName: serviceName error: error];
if (*error && [*error code] != noErr) {
return;
}
OSStatus status;
if (item) {
status = SecKeychainItemDelete(item);
CFRelease(item);
}
if (status != noErr) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
}
}
+ (SecKeychainItemRef) getKeychainItemReferenceForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error {
if (!username || !serviceName) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -2000 userInfo: nil];
return nil;
}
*error = nil;
SecKeychainItemRef item;
OSStatus status = SecKeychainFindGenericPassword(NULL,
strlen([serviceName UTF8String]),
[serviceName UTF8String],
strlen([username UTF8String]),
[username UTF8String],
NULL,
NULL,
&item);
if (status != noErr) {
if (status != errSecItemNotFound) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
}
return nil;
}
return item;
}
#else
+ (NSString *) getPasswordForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error {
if (!username || !serviceName) {
if (error != nil) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -2000 userInfo: nil];
}
return nil;
}
if (error != nil) {
*error = nil;
}
// Set up a query dictionary with the base query attributes: item type (generic), username, and service
NSArray *keys = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClass, kSecAttrAccount, kSecAttrService, nil];
NSArray *objects = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClassGenericPassword, username, serviceName, nil];
NSMutableDictionary *query = [[NSMutableDictionary alloc] initWithObjects: objects forKeys: keys];
// First do a query for attributes, in case we already have a Keychain item with no password data set.
// One likely way such an incorrect item could have come about is due to the previous (incorrect)
// version of this code (which set the password as a generic attribute instead of password data).
NSMutableDictionary *attributeQuery = [query mutableCopy];
[attributeQuery setObject: (id) kCFBooleanTrue forKey:(__bridge_transfer id) kSecReturnAttributes];
CFTypeRef attrResult = NULL;
OSStatus status = SecItemCopyMatching((__bridge_retained CFDictionaryRef) attributeQuery, &attrResult);
//NSDictionary *attributeResult = (__bridge_transfer NSDictionary *)attrResult;
if (status != noErr) {
// No existing item found--simply return nil for the password
if (error != nil && status != errSecItemNotFound) {
//Only return an error if a real exception happened--not simply for "not found."
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
}
return nil;
}
// We have an existing item, now query for the password data associated with it.
NSMutableDictionary *passwordQuery = [query mutableCopy];
[passwordQuery setObject: (id) kCFBooleanTrue forKey: (__bridge_transfer id) kSecReturnData];
CFTypeRef resData = NULL;
status = SecItemCopyMatching((__bridge_retained CFDictionaryRef) passwordQuery, (CFTypeRef *) &resData);
NSData *resultData = (__bridge_transfer NSData *)resData;
if (status != noErr) {
if (status == errSecItemNotFound) {
// We found attributes for the item previously, but no password now, so return a special error.
// Users of this API will probably want to detect this error and prompt the user to
// re-enter their credentials.? When you attempt to store the re-entered credentials
// using storeUsername:andPassword:forServiceName:updateExisting:error
// the old, incorrect entry will be deleted and a new one with a properly encrypted
// password will be added.
if (error != nil) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -1999 userInfo: nil];
}
}
else {
// Something else went wrong. Simply return the normal Keychain API error code.
if (error != nil) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
}
}
return nil;
}
NSString *password = nil;
if (resultData) {
password = [[NSString alloc] initWithData: resultData encoding: NSUTF8StringEncoding];
}
else {
// There is an existing item, but we weren't able to get password data for it for some reason,
// Possibly as a result of an item being incorrectly entered by the previous code.
// Set the -1999 error so the code above us can prompt the user again.
if (error != nil) {
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -1999 userInfo: nil];
}
}
return password;
}
+ (BOOL) storeUsername: (NSString *) username andPassword: (NSString *) password forServiceName: (NSString *) serviceName updateExisting: (BOOL) updateExisting error: (NSError **) error
{
if (!username || !password || !serviceName)
{
if (error != nil)
{
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -2000 userInfo: nil];
}
return NO;
}
// See if we already have a password entered for these credentials.
NSError *getError = nil;
NSString *existingPassword = [SFHFKeychainUtils getPasswordForUsername: username andServiceName: serviceName error:&getError];
if ([getError code] == -1999)
{
// There is an existing entry without a password properly stored (possibly as a result of the previous incorrect version of this code.
// Delete the existing item before moving on entering a correct one.
getError = nil;
[self deleteItemForUsername: username andServiceName: serviceName error: &getError];
if ([getError code] != noErr)
{
if (error != nil)
{
*error = getError;
}
return NO;
}
}
else if ([getError code] != noErr)
{
if (error != nil)
{
*error = getError;
}
return NO;
}
if (error != nil)
{
*error = nil;
}
OSStatus status = noErr;
if (existingPassword)
{
// We have an existing, properly entered item with a password.
// Update the existing item.
if (![existingPassword isEqualToString:password] && updateExisting)
{
//Only update if we're allowed to update existing.? If not, simply do nothing.
NSArray *keys = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClass,
kSecAttrService,
kSecAttrLabel,
kSecAttrAccount,
nil];
NSArray *objects = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClassGenericPassword,
serviceName,
serviceName,
username,
nil];
NSDictionary *query = [[NSDictionary alloc] initWithObjects: objects forKeys: keys];
status = SecItemUpdate((__bridge_retained CFDictionaryRef) query, (__bridge_retained CFDictionaryRef) [NSDictionary dictionaryWithObject: [password dataUsingEncoding: NSUTF8StringEncoding] forKey: (__bridge_transfer NSString *) kSecValueData]);
}
}
else
{
// No existing entry (or an existing, improperly entered, and therefore now
// deleted, entry).? Create a new entry.
NSArray *keys = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClass,
kSecAttrService,
kSecAttrLabel,
kSecAttrAccount,
kSecValueData,
nil];
NSArray *objects = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClassGenericPassword,
serviceName,
serviceName,
username,
[password dataUsingEncoding: NSUTF8StringEncoding],
nil];
NSDictionary *query = [[NSDictionary alloc] initWithObjects: objects forKeys: keys];
status = SecItemAdd((__bridge_retained CFDictionaryRef) query, NULL);
}
if (error != nil && status != noErr)
{
// Something went wrong with adding the new item. Return the Keychain error code.
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
return NO;
}
return YES;
}
+ (BOOL) deleteItemForUsername: (NSString *) username andServiceName: (NSString *) serviceName error: (NSError **) error
{
if (!username || !serviceName)
{
if (error != nil)
{
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: -2000 userInfo: nil];
}
return NO;
}
if (error != nil)
{
*error = nil;
}
NSArray *keys = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClass, kSecAttrAccount, kSecAttrService, kSecReturnAttributes, nil];
NSArray *objects = [[NSArray alloc] initWithObjects: (__bridge_transfer NSString *) kSecClassGenericPassword, username, serviceName, kCFBooleanTrue, nil];
NSDictionary *query = [[NSDictionary alloc] initWithObjects: objects forKeys: keys];
OSStatus status = SecItemDelete((__bridge_retained CFDictionaryRef) query);
if (error != nil && status != noErr)
{
*error = [NSError errorWithDomain: SFHFKeychainUtilsErrorDomain code: status userInfo: nil];
return NO;
}
return YES;
}
#endif
@end
