1. 退出登錄時(shí)，保存用戶手機(jī)號(hào)，以便下次登錄時(shí)，直接帶出手機(jī)號(hào)

// 退出登錄時(shí)，調(diào)用此方法，存當(dāng)前時(shí)間戳
- (void)saveDateMobileNoWhenLogout {
    NSDate *logoutDate = [NSDate date];
    NSDictionary *dict = @{kAppMobileNo:[JFUserInfoModel getMobileNo],
                           kAppLogoutDate:logoutDate};
    [[WXLocalSettings sharedSettings] setSettings:dict forKey:kAppLogout];
}

2. 新建工具類(lèi)，取出退出登錄時(shí)記錄的手機(jī)號(hào)

+ (NSString *)getMobileNoWhenLogin {
    // 拿到退出登錄時(shí)的手機(jī)號(hào)和時(shí)間
    NSDictionary *userLogout = [[WXLocalSettings sharedSettings] getSettings:kAppLogout];
    NSDate *nowDate = [NSDate date];
    NSDate *logoutDate = userLogout[kAppLogoutDate];
    if (!logoutDate) {
        return nil;
    }
//     兩個(gè)時(shí)間戳的間隔   返回的是秒
    NSTimeInterval time = [nowDate timeIntervalSinceDate:logoutDate];
    if (time/60/60 >= 72) {
        return nil;
    }
    else {
        return userLogout[kAppMobileNo];
    }
}