Get network request method of string concatenation

<span style= "FONT-FAMILY:SIMHEI;FONT-SIZE:24PX;" ></span>

</pre><pre name= "code" class= "OBJC" ><span style= "FONT-FAMILY:SIMHEI;FONT-SIZE:24PX;" ></span>

</pre><pre name= "code" class= "OBJC" ><span style= "FONT-FAMILY:SIMHEI;FONT-SIZE:24PX;" > We often get the data through a network request in code, one of the methods is the Getting method, the following is the asynchronous request method:</span>

<span style= "FONT-FAMILY:SIMHEI;FONT-SIZE:24PX;" > First create a class that inherits from NSObject named Connection;</span>

<span style= "FONT-FAMILY:SIMHEI;FONT-SIZE:24PX;" > in. h files need to follow <<span style= "Color:rgb (52, 149, 175);" >nsurlconnectiondatadelegate</span>><span style= "Color:rgb (52, 149, 175);" > Agreement </span></span>

<span style= "FONT-FAMILY:SIMHEI;FONT-SIZE:24PX;" > Then write a class method group as an interface:</span>

+ (void) Connectionwithurl: (NSString *) strURL parmaters: (nsdictionary *) parmaters delegate: (Id<connectiondelegate >) Delegate flag: (Nsinteger) flag;

The web site is divided into two parts, part fixed, and some parameters

-(void) Startrequest: (NSString *) urlstr parmaters: (nsdictionary *) parmaters

{

NSString *str = @ "";

URL of the mosaic:

For (NSString *key in [parmaters AllKeys]) {

if ([str length] = = 0) {

str = [NSString stringwithformat:@ "?%@=%@", Key, [Parmaters Objectforkey:key]];

}

Else

{

str = [NSString stringwithformat:@ "%@&%@=%@", str, key, [Parmaters Objectforkey:key]];

}

}

URL can not have spaces and Chinese characters

str = [NSString stringwithformat:@ "%@%@", Urlstr, str];

str = [STR stringbyreplacingpercentescapesusingencoding:nsutf8stringencoding];

NSLog (@ "%@", str);

Nsurl *url = [Nsurl urlwithstring:str];

Encapsulated as request requests:

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

[Request sethttpmethod:@ "get"];

To establish a connection:

[Nsurlconnection connectionwithrequest:request delegate:self];

}

+ (void) Connectionwithurl: (NSString *) strURL parmaters: (nsdictionary *) parmaters delegate: (Id<connectiondelegate >) Delegate flag: (Nsinteger) flag

{

Connection *con = [[Connection alloc] init];

Con.delegate = delegate;

Con.flag = Flag;

[Con startrequest:strurl parmaters:parmaters];

[Con release];

}

Protocol execution:

-(void) connection: (Nsurlconnection *) connection didreceiveresponse: (Nsurlresponse *) response

{

}

-(void) connection: (Nsurlconnection *) connection didreceivedata: (NSData *) data

{

To splice data:

[Self.data Appenddata:data];

}

-(void) connectiondidfinishloading: (nsurlconnection *) connection

{

To return data with a protocol:

if ([Self.delegate respondstoselector: @selector (seldata:flag:)]) {

[Self.delegate SelData:self.data Flag:self.flag];

}

}

-(void) connection: (Nsurlconnection *) connection didfailwitherror: (Nserror *) error

{

}

<span style= "Font-family:simhei;" ></span>