Tulsa Dev Lunch iOS at Work

iOS at Work:
Integrating iOS Apps with
Back End Systems
Tulsa Dev Lunch
February 13, 20
1 3
Mat llowaoydinaire)
t Ga a r
obile Develo per Extr
(Fr eelance M

Wednesday, February 13, 13

h at a bo ut
W d?
A n dr oi


Android s
ucks.
(Espec ially for business.)


Most Consistent API

Consistent Hcxrdwcxre

--

Best Securit.Y

1=eel G-ood Kumb·,cx Pseudo Open
Source-ness

aid, most of what I’m gonna say a bout iOS applies to Android too.
That s Meh.


Th ink m obile!
Th ink n ow!

Ch aracteristi cs of Mobile
not a keyboard /mouse paradigm
small screen
unreliable low bandwidth high latency network connection

ocessing power a nd local storage
limited pr
limited battery life
hostile work environment
untapped resources: camera(s), acceler
ometers,
GPS, phone, speaker, mic, LED flash


Mo bile w eb or die.


Natrve (iOS, Android,
Blackberry, Windows
Phone) App Window

Flll~dwith a single
Awesome Dashboard We.bVIeW widget loaded
"App" With your mobile web
content.

Awesome Dashboard
"App"


When the web wo n’t do.
Performance/Responsiveness/UX.
Complex lo cal data store.
Ne twork optional.
Hardware control.
Sophisticated UI.
3D/a ccelerated graphics.

re ent erprise mobile
How a
ap ps diff erent?
Complex local data st
res. o
I ntegration wi th back office
systems.

,..__---------~----~~

Mob.1le Inte_gr~t:1on J>os &- J>on'ts
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Discl aimer : I’m
not .NET devel oper,
bu tIe xper iment ed a
little in co llege.

In Vis ual St udio...
1.) Create a Web Project
a new Entity Model
2.) Create
3.) Reverse enginee r Entity Model
from Database
reate a WCF Dat a Service o
4.) C odel Cl ass t
Add y our En tity M
5.) ration
decla .
class cess
the S ervice a ac
onf igure dat
6.) C

[JSONPSupportBehavior]
public class Service : DataService<YourEnterpriseEntities>
{
// This method is called only once to initialize service-wide policies.
public static void InitializeService(DataServiceConfiguration config)
{
// config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
config.SetEntitySetAccessRule("Locations", EntitySetRights.AllRead);
config.SetEntitySetAccessRule("Customers", EntitySetRights.All);
config.SetEntitySetAccessRule("SalesOrders", EntitySetRights.All);
config.SetEntitySetAccessRule("Secrets", EntitySetRights.None);

//Set a reasonable paging site
config.SetEntitySetPageSize("*", 25);

config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
}
}

Source:
http://www.hanselman.com/blog/CreatingAnODataAPIForStackOverflowIncludingXMLAndJSONIn30Minutes.aspx

http:LLyourhost.comLservice.svcLCustomers()

http:LLyourhost.comLservice.svcLCustomers(34)

http:LLyourhost.comLservice.svcLCustomers()?
$filter=substringof('itactile',Name) or
substringof('Galloway' ,ContactLastName)&
$format=json

http:LLyourhost.comLservice.svcLCustomers(34)?
$expand=Sales0rders$format=json


http:LLyourhost.comLservice.svcL?~format=json

{
"d" •
• {
"Enti tySets" : [
"Batches", "Drawings", "DrawingTypes", "Elements", "ElernentAnswers",
"ElernentAnswerPhotoes", "ElernentGroups", "Elernenticons",
"ElernentQuestions", "ElernentRequirernents", "ElernentTypes",
"LocationMetaDatas", "LocationMetaDataFields", "Locations",
"PickListirnages", "Projects", "StoreAccesses", "sysdiagrarns",
"TestTables", "tlkDivisions", "UpdElernents", "UpdElernentAnswers",
"UpdElernentAnswerPhotoes", "UpdLocationMetaDatas", "Users"
]
}
}


http://yourhost.com/service.svc/ElementTypes?Sfor.mat=json

{
"d" : [
{
" metadata": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(1)", "type": "YourDataModel.ElementType"
}, "elementTypeid": 1, "name": "POS 1&2 Camera", "elementGroupid": 1, "lastModified": "/Date(1340728631167)/",
"active": true, "elementiconid" : 3 4, "Elements" : {
"_deferred": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(1) / Elements"
}
} , "ElementGroup": {
"_deferred": {
"uri": "http://yourhost.com/service.svc/ElementTypes(1)/ElementGroup"
}
} , "Elementicon" : {
"_deferred": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(1) / Elementicon"
}
}, "ElementRequirements": {
"_deferred": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(1) / ElementReguirements"
}
}, "DrawingTypes": {
"_deferred": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(1) /DrawingTypes "
}
}, "ElementQuestions": {
"_deferred": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(1) / ElementOuestions"
}
}
}' {
" metadata": {
"uri": "http: //yourhost.com/service.svc / ElementTypes(2)", "type": "YourDataModel.ElementType"
}, "elementTypeid": 2, "name": "POS 3&4 Camera", "elementGroupid": 1, "lastModified": "/Date(1340728631167)/",


http://yourhost.com/service.svc/ElementTypes(l)?Sformat=json&
Sexpand=ElementGroup
{
"d" : {
" metadata" : {
"uri": "http : //yourhost.com/service.svc/ElementTypes(1)", "type" : "QTSecurityModel . ElementType"
}, "elementTypei d": 1, "name" : "POS 1&2 Camera", "elementGroupid" : 1 , "lastModif i ed" : "/Date( 1340728631167) /", "active":
true, "elementiconi d" : 34, "Elements" : {
"_ de f erred" : {
"uri": "http : //yourhost.com/service.svc/ElementTypes(1)/Elements"
}
} , "ElementGroup": {
"_metadata": {
"uri": "http://yourhost.com/service.svc/ElementGroups(1)", "type": "QTSecurityModel.ElementGroup"
}, "elementGroupid": 1, " name": "Cameras", "sortOrder": 1, "lastModified": "/ Date(1340289282327)/", " active": true,
"ElementTypes": {
"_deferred": {
"uri": "http://yourhost.com/service.svc/ElementGroups(1)/ElementTypes"
}
}
} , "Element i con" : {
"_ de f erred" : {
"uri": "http : //yourhost.com/service.svc/ElementTypes(1)/Element i con"
}
}, "ElementRequirements" : {
"_ de f erred" : {
"uri": "http : //yourhost.com/service.svc/ElementTypes(1)/ElementReguirements"
}
} , "DrawingTypes" : {
"_ de f erred" : {
"uri": "http : //yourhost.com/service.svc/ElementTypes(1)/DrawingTypes"
}
}, "ElementQuestions" : {
"_ de f erred" : {
"uri": "http : //yourhost.com/service.svc/ElementTypes(1)/ElementOu estions"
}
}
}
}


The M obile Dev
POV


Reading Data
+(id) syncRequest: (NSString *) urlString error:(NSError **) error {

NSLog(@"syncRequest: %@",urlString);

urlString=[SyncHelper addJsonToUri:urlString]; // Adds ?$format=json to URL

NSURL *url = [NSURL URLWithString:urlString];

NSError *internalError = nil;

NSURLResponse *response=nil;

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

if (HTTP_USER!=nil && [HTTP_USER length]>0 && HTTP_PASSWORD!=nil && [HTTP_PASSWORD length]>0) {
NSString *authStr = [NSString stringWithFormat:@"%@:%@",HTTP_USER,HTTP_PASSWORD];
NSData *authData = [authStr dataUsingEncoding:NSASCIIStringEncoding];
NSString *authValue = [NSString stringWithFormat:@"Basic %@", [authData base64EncodingWithLineLength:80]];
[request setValue:authValue forHTTPHeaderField:@"Authorization"];
}

NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&internalError];

if (!internalError) {
internalError=nil;

NSDictionary *interimDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers|NSJSONReadingAllowFragments
error:&internalError];

if (internalError!=nil) {
NSLog(@"Error parsing JSON from syncRequest: %@ ",[internalError debugDescription]);

if (error!=nil) *error=internalError;
return nil;
}

NSDictionary *errorDict = [interimDict objectForKey:@"error"];
if (errorDict!=nil) {
NSDictionary *messageDict = [errorDict objectForKey:@"message"];
NSString *errorMessage = [messageDict objectForKey:@"value"];
if (error!=nil) *error=[NSError errorWithDomain:ERROR_DOMAIN code:4000 localizedDescription:[NSString stringWithFormat:@"Error received from
server: %@",errorMessage]];
return nil;
}


id retVal = [interimDict objectForKey:@"d"];
if ([retVal isKindOfClass:[NSDictionary class]] && [((NSDictionary *)retVal) objectForKey:@"results"]!=nil) {
return [((NSDictionary *)retVal) objectForKey:@"results"];
} else {
return retVal;
}

} else {
NSLog(@"Error: unable to complete web request because - %@",[internalError localizedDescription]);
if (error!=nil) *error=internalError;
return nil;
}

NSArray
}

If result is a list, an
NSMutab leDiction ary’s is
of
ret urned.
Otherwise, an
NSMutableDictionary
is returned.

Inserting New Data
+(BOOL) insertEntity:(id) entity entityName:(NSString *)entityName error:(NSError **) error
{
NSString *urlString = [SyncHelper urlStringForEntity:entityName]; // Turns “EntityName” into “http://yourserver/service.svc/EntityName

NSURL *url = [NSURL URLWithString:urlString];


[request setHTTPMethod:@"POST"];
[request addValue:@"Application/json" forHTTPHeaderField:@"content-type"];
[request addValue:@"Application/json" forHTTPHeaderField:@"accept"];
[request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];

}


NSData *payload = [NSJSONSerialization dataWithJSONObject:entity options:NSJSONWritingPrettyPrinted error:&internalError];

if (internalError != nil) {
if (error!=nil) *error = internalError;
return NO;
}

[request setHTTPBody: payload];

NSHTTPURLResponse *response = nil;
internalError = nil;


return NO;
}

NSString *responseStatus = [NSHTTPURLResponse localizedStringForStatusCode:[response statusCode]];

if ([response statusCode]!=201) {
if (error!=nil) *error = [NSError errorWithDomain:ERROR_DOMAIN code:100
localizedDescription:[NSString stringWithFormat:@"HTTP ERROR (%i) %@",[response statusCode],responseStatus]];
}

return [response statusCode]==201;

}


+(BOOL) updateEntity:(NSMutableDictionary *)entity forKeys:(NSArray *)keys error:(NSError **) error {

NSDictionary *metadata = [entity valueForKey:@"__metadata"];
if (metadata==nil) return NO;

NSURL *url = [NSURL URLWithString:[metadata valueForKey:@"uri"]];

[request
[request
setHTTPMethod:@"POST"];
addValue:@"MERGE" forHTTPHeaderField:@"X-HTTP-Method"];
Updating Data
[request addValue:@"Application/json" forHTTPHeaderField:@"content-type"];
[request addValue:@"Application/json" forHTTPHeaderField:@"accept"];
[request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];

}

NSMutableDictionary *payloadDict = [NSMutableDictionary dictionaryWithCapacity:10];

[payloadDict setValue:metadata forKey:@"__metadata"];
for (NSString *key in keys) {
[payloadDict setValue:[entity valueForKey:key] forKey:key];
}


NSData *payload = [NSJSONSerialization dataWithJSONObject:payloadDict options:NSJSONWritingPrettyPrinted error:&internalError];

return NO;
}

[request setHTTPBody: payload];

NSHTTPURLResponse *response = nil;
internalError = nil;


return NO;
}

NSString *responseStatus = [NSHTTPURLResponse localizedStringForStatusCode:[response statusCode]];

if ([response statusCode]!=204) {
if (error!=nil) *error = [NSError errorWithDomain:ERROR_DOMAIN code:5000
localizedDescription:[NSString stringWithFormat:@"HTTP ERROR (%i) %@",[response statusCode],responseStatus]];
}

return [response statusCode]==204;
}


What to Do With an NSMutableDictionary?
1.) Parse into proper objects
2.) Create a wrapper object that
stores NSMutableDictionary internally
3.) Use Objective-C Categories to add
field-like methods to NSMutableDictionary
But don’t just
[object objectForKey: @“propertyName“]

//
// NSMutableDictionary+Customer.m
// Yale Cleaners
//
// Created by Matt Galloway on 8/31/12.
// Copyright (c) 2012 Architactile LLC. All rights reserved.
//

#import "NSMutableDictionary+Customer.h"

@implementation NSMutableDictionary (Customer)

#pragma mark - Customer Custom Getters

-(NSString *) mobileNumber {

ple
return [self filteredObjectForKey:@"Mobile_no"];
}

am
-(NSString *) sendEmail {
return [self filteredObjectForKey:@"SendEmail"];
}

Ex
-(NSString *) sendReceipt {
return [self filteredObjectForKey:@"SendReceipt"];
}

ry
-(NSString *) sendText {
return [self filteredObjectForKey:@"SendText"];
}

ego
-(NSString *) username {
return [self filteredObjectForKey:@"User_Name"];
}

t
-(NSString *) uri {
return [self filteredObjectForKey:@"uri"];

Ca
}

-(NSString *) address {
return [self filteredObjectForKey:@"address"];

-(NSString *) area {
return [self filteredObjectForKey:@"area"];
}

-(NSString *) charge {
return [self filteredObjectForKey:@"charge"];
}

-(NSString *) city {
return [self filteredObjectForKey:@"city"];
}
.
.
.


Use HTT PS +
Au then tica tion
(at a mini mum)

Loca l Data Store?

M eet SQ Lite &
Cor eData


ata is one of iOS’s
CoreD
greate st adv antag es over
d for b usiness apps.
Androi


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To Re cap...
A ndroid sucks.
Mobilize your web assets.
he mob ile web first.
Con sider t
Avoid SQL & SOAP.
Use RESTful APIs.
Co reData i s way w orth it.

Mat llowaoydinaire)
t Ga a r
o bile Develo per Extr
(Fre elance M

matt@architactile.c
om
918 -808- 3072


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