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xamarin cross platform

i have source code made by C# xamarin cross platform the android part is working good but when i want to open the ios part its not working

NullPointerException

System can not reference null object.

Kĩ năng: Lập trình C#, Mobile App Development, iPhone, Android

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Về Bên Thuê:
( 0 nhận xét ) Saudi Arabia

ID dự án: #20339552

21 freelancer đang chào giá trung bình $158 cho công việc này

Yknox

Hi, I am very interested in your project and I have already enough experiences in projects like this. I have developed many kinds of xamarin apps for 10 years. I have checked your requirement in detail and I am sure I Thêm

$155 USD trong 3 ngày
(792 Nhận xét)
9.2
contact2phpsl

Hi I would appreciate if you please interact with me. I am a Xamarin specialist with extensive experience in developing mobile applications using C#, Net Framework, Xaml, [login to view URL] etc. Have a look at my work s Thêm

$250 USD trong 2 ngày
(581 Nhận xét)
9.2
Gates777

Hello. How are you? I am very interested in your project. I have read your project description very carefully. I can fix your mobile app for you using Xamarin. I have developed many android and ios apps for 6 years by Thêm

$140 USD trong 7 ngày
(214 Nhận xét)
7.6
Smart1902

Hello there, I am highly experienced with [login to view URL], C#, MMVM, and looking forward to assist you on a contract includes multiple tasks. My soft skills includes:- • Ability to communicate clearly • Dedication to m Thêm

$250 USD trong 7 ngày
(97 Nhận xét)
7.5
masterlancer999

Hello I've just read your job posting and I'm very interested. I am a expert mobile developer and I have many experiences in Xamarin app development for android and ios I know how to bring your idea alive and commun Thêm

$50 USD trong 7 ngày
(81 Nhận xét)
7.5
winlancerinc

Hello There, I've gone through job post and available with my team to handle this project which will have Oauth authentication, biometric devices, and API from our API platform About Me: ---------------------- We're Thêm

$250 USD trong 7 ngày
(26 Nhận xét)
6.1
fastestJohn

Hello. I have just read your proposal in detail. I am a Unity, C# ✮✮✮expert✮✮✮ and I have rich experiences in Unity and Mobile App Dev as you can see my portfolio and reviews. https://www.freelancer.com/u/fastestJohn Thêm

$100 USD trong 7 ngày
(43 Nhận xét)
5.9
KOKTech

Hi! How are you? I am a senior software developer who has rich experiences in xamarin cross platform app development. I read your description and i am really interested in your project. I guarantee I could provide you Thêm

$200 USD trong 7 ngày
(14 Nhận xét)
5.6
lalitatmt

Hello there, Hope you are doing well. As per your need, I am proficient with C#,xamarin . I am having around 15+ years of experience in mobile & .NET technologies. I am expert in asp.net MVC, Web API, asp.net, WPF, A Thêm

$200 USD trong 7 ngày
(7 Nhận xét)
4.9
valiksoin

Dear!!! Hiring Manager, As a web/mobile app programming expert with 10+ years of experience and powerful mathematics basics I always have designed and built awesome software products based on the strong logic and abs Thêm

$200 USD trong 7 ngày
(38 Nhận xét)
5.1
infodart

Hi There!! I am Sudesh a Xamarin expert with intense experience with Xamarin iOS /Xamarin forms/ Xamarin Android, XAML C#, .NET, Visual studio 2017, Xcode , objective C and Swift , MVVM and Binding technology, Package Thêm

$200 USD trong 3 ngày
(16 Nhận xét)
5.0
Gurvinder94

Hi, I have 3 year experience in xamarin forms.I have worked on several mobile apps on this freelancer platform and other platforms too. I would love to work for you on this [login to view URL] forward for a response. Tha Thêm

$50 USD trong 7 ngày
(10 Nhận xét)
4.4
ersahil1987

Hi There, Hope you're doing great!! As per the requirements, you want to I'm the Xamarin iOS/Android developer with a proven knack for designing and developing efficient, high-performance, user-friendly mobile appli Thêm

$140 USD trong 7 ngày
(11 Nhận xét)
5.1
phantom1222

Hi, I have read all your requirement and I wish to work for your project. I have rich experience with full-stack development and I can help you perfectly. I'm very interested in your job post.I believe my skills woul Thêm

$140 USD trong 7 ngày
(6 Nhận xét)
4.0
xamarinhub

Hi, Devanshi here. Thank you for posting your job opening for Mobile App. I have the 9 year of experience in .Net technologies and having 4+ year of experienced in xamarin. In my Mobile App, i have used Email Signu Thêm

$112 USD trong 5 ngày
(8 Nhận xét)
2.9
aleksandr201906

***Hello sir.*** I'm expert at front-end developing especially REACT JS AND REACT NATIVE. I have looked through your job description and I think my skill set perfectly matches your job to get the great success. If you Thêm

$140 USD trong 7 ngày
(2 Nhận xét)
1.3
pachanipratik

Hello Sir! I read your job posting carefully and am very interested in your project. I have always been giving clients satisfaction with the great quality of work. If you work with me, I will provide you top quality o Thêm

$200 USD trong 7 ngày
(2 Nhận xét)
1.2
anjanasingh729

Hands-on experience of Xamarin form development. I have good exposure to ios and android with Xamarin. Knowledge of building IPA and APK. I am an active member of C# Corner Community and awarded as Most Valuable Profes Thêm

$200 USD trong 16 ngày
(0 Nhận xét)
0.0
arunprabu2k19

Hello, hope you are great :) I'm happy to share you that, Congenial Studioss (CS) is an India-based Offshore Software Development Company Specializing in Web development, Mobile App development and 2D-Animation Desig Thêm

$60 USD trong 7 ngày
(0 Nhận xét)
0.0
amr2006

Hi , I'm expert Egyptian Xamarin Developer , I can solve your problem in time , just contact me to start work

$140 USD trong 7 ngày
(0 Nhận xét)
0.0