ios--请求接口并解析xml

工具类：

1、请求接口要用到的工具类：webservice

webservice.h

#import <Foundation/Foundation.h>
#import "XMLParser.h"
#import "WeiboSDK/WeiboSDK.h"
@interface webservice : NSObject<MBProgressHUDDelegate>
{
MBProgressHUD *HUD;
}
-(NSDictionary *)insertCatalogWithJsonForJson:(NSURL*)strurl send:(NSDictionary *)sendinfo;
-(TreeNode *)insertCatalogWithJson:(NSURL*)strurl send:(NSDictionary *)sendinfo;
-(TreeNode *)insertCatalogWithJsondata:(NSURL*)strurl send:(NSData *)sendinfo;
-(TreeNode *)insertCatalogWithJsonmul:(NSURL*)strurl send:(NSMutableDictionary *)sendinfo ;
-(void *)getxmldata:(TreeNode *)node receive:(NSMutableArray *)arrreceive result:(NSMutableArray *)resultarry;
@property (strong, nonatomic) IBOutlet UIView *fatherview;
@property (nonatomic) bool show;
@property (nonatomic) bool errorconnect;
@end


webservice.m
#import "webservice.h"
#import "AppDelegate.h"
@implementation webservice
//傳送至web Service
-(NSDictionary *)insertCatalogWithJsonForJson:(NSURL*)strurl send:(NSDictionary *)sendinfo {
NSLog(@"strurl=%@,dic=%@",[strurl debugDescription],[sendinfo debugDescription]);
NSError *error = NULL;
//壓縮成NSData，這時的編碼會成UTF8格式
NSData *jsonData = [NSJSONSerialization
dataWithJSONObject:sendinfo
options:NSJSONWritingPrettyPrinted
error:&error];

NSString *urlAsString = [[NSString alloc]initWithString: [strurl absoluteString]];
urlAsString = [urlAsString stringByAppendingString:@"?action=insert"];

NSURL *url = [NSURL URLWithString:urlAsString];

NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
[urlRequest setTimeoutInterval:50.0f];
[urlRequest setHTTPMethod:@"POST"];
//直接把NSData(這時的編碼為UTF8)做為傳送的內容
[urlRequest setHTTPBody:jsonData];
NSURLResponse *response = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:urlRequest
returningResponse:&response error:&error];

if ([data length] >0 && error == nil)
{
//获得到数据
NSString *html = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"html = %@",html);

NSData *data1 = [html dataUsingEncoding:NSUTF8StringEncoding];
//NSLog(@"data1 = %@", [data1 debugDescription]);

NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data1 options:kNilOptions error:&error];
NSMutableArray *arr=[dic mutableArrayValueForKey:@"jsonOK"];
return [arr objectAtIndex:0];
//return node;
}else if ([data length] == 0 && error == nil)
{
NSLog(@"Nothing was downloaded.");

}
else if (error != nil)
{
NSLog(@"Error happened = %@", error);
//if ([error code]==-1009) {
[self errordo:[error localizedDescription]];
//}
}
return nil;
}

//傳送至web Service
-(TreeNode *)insertCatalogWithJson:(NSURL*)strurl send:(NSDictionary *)sendinfo {

NSError *error = NULL;
//壓縮成NSData，這時的編碼會成UTF8格式
NSData *jsonData = [NSJSONSerialization
dataWithJSONObject:sendinfo
options:NSJSONWritingPrettyPrinted
error:&error];

NSString *urlAsString = [[NSString alloc]initWithString: [strurl absoluteString]];
urlAsString = [urlAsString stringByAppendingString:@"?action=insert"];

NSURL *url = [NSURL URLWithString:urlAsString];

NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
[urlRequest setTimeoutInterval:50.0f];
[urlRequest setHTTPMethod:@"POST"];
//直接把NSData(這時的編碼為UTF8)做為傳送的內容
[urlRequest setHTTPBody:jsonData];
NSURLResponse *response = nil;

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

if ([data length] >0 && error == nil)
{
// 使用下面代码获取web服务器上的xml，并将xml转换成树：
XMLParser *parser = [[XMLParser alloc] init];
// NSURL * url = [[NSURL alloc] initWithString:@"Login.xml"];
TreeNode *node = [parser parseXMLFromData:data];
//NSLog(@"node = %@", [node debugDescription]);
return node;
}else if ([data length] == 0 && error == nil)
{
NSLog(@"Nothing was downloaded.");

}
else if (error != nil)
{
NSLog(@"Error happened = %@", error);
//if ([error code]==-1009) {
[self errordo:[error localizedDescription]];
//}
}
return nil;
}

-(TreeNode *)insertCatalogWithJsonmul:(NSURL*)strurl send:(NSMutableDictionary *)sendinfo {

NSError *error = NULL;
//壓縮成NSData，這時的編碼會成UTF8格式
NSData *jsonData = [NSJSONSerialization
dataWithJSONObject:sendinfo
options:NSJSONWritingPrettyPrinted
error:&error];
NSLog(@"%@",error);
NSString *urlAsString = [[NSString alloc]initWithString: [strurl absoluteString]];
urlAsString = [urlAsString stringByAppendingString:@"?action=insert"];

NSURL *url = [NSURL URLWithString:urlAsString];

NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
[urlRequest setTimeoutInterval:30.0f];
[urlRequest setHTTPMethod:@"POST"];
//直接把NSData(這時的編碼為UTF8)做為傳送的內容
[urlRequest setHTTPBody:jsonData];

NSURLResponse *response = nil;

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

if ([data length] >0 && error == nil)
{
// 使用下面代码获取web服务器上的xml，并将xml转换成树：
XMLParser *parser = [[XMLParser alloc] init];
// NSURL * url = [[NSURL alloc] initWithString:@"Login.xml"];
TreeNode *node = [parser parseXMLFromData:data];

return node;
}else if ([data length] == 0 && error == nil)
{
NSLog(@"Nothing was downloaded.");

}
else if (error != nil)
{
NSLog(@"Error happened = %@", error);
//if ([error code]==-1009) {
[self errordo:[error localizedDescription]];
//}
}
return nil;
}
-(TreeNode *)insertCatalogWithJsondata:(NSURL*)strurl send:(NSData *)sendinfo {

NSError *error = NULL;
NSString *urlAsString = [[NSString alloc]initWithString: [strurl absoluteString]];
urlAsString = [urlAsString stringByAppendingString:@"&action=insert"];
NSURL *url = [NSURL URLWithString:urlAsString];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
[urlRequest setTimeoutInterval:20.0f];
[urlRequest setHTTPMethod:@"POST"];
//直接把NSData(這時的編碼為UTF8)做為傳送的內容
[urlRequest setHTTPBody:sendinfo];
NSURLResponse *response = nil;

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

if ([data length] >0 && error == nil)
{
// 使用下面代码获取web服务器上的xml，并将xml转换成树：
XMLParser *parser = [[XMLParser alloc] init];
// NSURL * url = [[NSURL alloc] initWithString:@"Login.xml"];
TreeNode *node = [parser parseXMLFromData:data];

return node;
}else if ([data length] == 0 && error == nil)
{
NSLog(@"Nothing was downloaded.");

}
else if (error != nil)
{
NSLog(@"Error happened = %@", error);
//if ([error code]==-1009) {
[self errordo:[error localizedDescription]];
//}
}
return nil;
}
-(void *)getxmldata:(TreeNode *) node receive:(NSMutableArray *)arrreceive result:(NSMutableArray *)resultarry
{
// NSString *html = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
// NSMutableArray *dataarry = [[NSMutableArray alloc] init];
// NSLog(@"HTML = %@", html);

//获取xml中的登录结果：
for(NSString *string in arrreceive)
{
NSRange range;
range=[string rangeOfString:@"#"];
if (range.length ==0) {
NSString * strkey=[node leafForKey:string];
if (strkey ==nil) {
strkey = @"";
}
NSString * result = [[NSString alloc] initWithString:strkey];
// NSLog(@"result=%@",result);
if ([result isEqual:nil]||[result isEqualToString:@""]) {
continue;
}
[resultarry addObject:result];
}
else
{
//类似xpath去取值：
NSArray *array = [string componentsSeparatedByString:@"#"];
NSString * result = [[NSString alloc] initWithString:[node leafForKeys:array]];
// NSLog(@"result=%@",result);
if ([result isEqual:nil]||[result isEqualToString:@""]) {
continue;
}
[resultarry addObject:result];
}
}
//重新從WebService讀取資料
// [self wsLookingFun];

}

- (void)errordo:(NSString *)content {
// Do something usefull in here instead of sleeping ...
//sleep(1);
self.errorconnect=true;
if (!self.show) {
AppDelegate *appDelegate=[[UIApplication sharedApplication] delegate];
[appDelegate.crtabBarController performSelectorOnMainThread:@selector(errordo:) withObject:content waitUntilDone:YES];
}

// UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:content delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
// [alter show];
}
- (void)myTask {
// Do something usefull in here instead of sleeping ...
sleep(3);
}

@end


2、xml解析要用到两个工具类：XMLParser和TreeNode

XMLParser.h

#import <CoreFoundation/CoreFoundation.h>
#import "TreeNode.h"
@interface XMLParser : NSObject
{
NSMutableArray *stack;
}
+ (XMLParser *) sharedInstance;
- (TreeNode *) parseXMLFromURL: (NSURL *) url;
- (TreeNode *) parseXMLFromData: (NSData*) data;
@end

XMLParser.m

#import "XMLParser.h"
@implementation XMLParser
static XMLParser *sharedInstance = nil;
// Use just one parser instance at any time
+(XMLParser *) sharedInstance
{
if(!sharedInstance) {
sharedInstance = [[self alloc] init];
}
return sharedInstance;
}
// Parser returns the tree root. You may have to go down one node to the real results
- (TreeNode *) parse: (NSXMLParser *) parser
{
stack = [NSMutableArray array];
TreeNode *root = [TreeNode treeNode];
root.parent = nil;
root.leafvalue = nil;
root.children = [NSMutableArray array];
[stack addObject:root];
[parser setDelegate:self];
[parser parse];
// [parser release];
// pop down to real root
TreeNode *realroot = [[root children] lastObject];
root.children = nil;
root.parent = nil;
root.leafvalue = nil;
root.key = nil;
realroot.parent = nil;
return realroot;
}

- (TreeNode *)parseXMLFromURL: (NSURL *) url
{
TreeNode *results;
// NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
results = [self parse:parser];
// [pool drain];
return results;
}
- (TreeNode *)parseXMLFromData: (NSData *) data
{
TreeNode *results;
// NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
results = [self parse:parser];
// [pool drain];
return results;
}
// Descend to a new element

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)
namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if (qName) elementName = qName;
TreeNode *leaf = [TreeNode treeNode];
leaf.parent = [stack lastObject];
[(NSMutableArray *)[[stack lastObject] children] addObject:leaf];
leaf.key = [NSString stringWithString:elementName];
leaf.leafvalue = nil;
leaf.children = [NSMutableArray array];
[stack addObject:leaf];
}
// Pop after finishing element

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
[stack removeLastObject];
}
// Reached a leaf

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
if (![[stack lastObject] leafvalue])
{
[[stack lastObject] setLeafvalue:[NSString stringWithString:string]];
return;
}
[[stack lastObject] setLeafvalue:[NSString stringWithFormat:@"%@%@", [[stack lastObject] leafvalue], string]];
}
@end


TreeNode.h

#import <CoreFoundation/CoreFoundation.h>
@interface TreeNode : NSObject
{
TreeNode *parent;
NSMutableArray *children;
NSString *key;
NSString *leafvalue;
}
@property (nonatomic, retain) TreeNode *parent;
@property (nonatomic, retain) NSMutableArray *children;
@property (nonatomic, retain) NSString *key;
@property (nonatomic, retain) NSString *leafvalue;
@property (nonatomic, readonly) BOOL isLeaf;
@property (nonatomic, readonly) BOOL hasLeafValue;
@property (nonatomic, readonly) NSArray *keys;
@property (nonatomic, readonly) NSArray *allKeys;
@property (nonatomic, readonly) NSArray *uniqKeys;
@property (nonatomic, readonly) NSArray *uniqAllKeys;
@property (nonatomic, readonly) NSArray *leaves;
@property (nonatomic, readonly) NSArray *allLeaves;
@property (nonatomic, readonly) NSString *dump;
+ (TreeNode *) treeNode;
- (NSString *) dump;
- (void) teardown;
// Leaf Utils
- (BOOL) isLeaf;
- (BOOL) hasLeafValue;
- (NSArray *) leaves;
- (NSArray *) allLeaves;
// Key Utils
- (NSArray *) keys;
- (NSArray *) allKeys;
- (NSArray *) uniqKeys;
- (NSArray *) uniqAllKeys;
// Search Utils
- (TreeNode *) objectForKey: (NSString *) aKey;
- (NSString *) leafForKey: (NSString *) aKey;
- (NSMutableArray *) objectsForKey: (NSString *) aKey;
- (NSMutableArray *) leavesForKey: (NSString *) aKey;
- (TreeNode *) objectForKeys: (NSArray *) keys;
- (NSString *) leafForKeys: (NSArray *) keys;
- (NSMutableArray *) childrenForKeys: (NSArray *) keys;
// Convert Utils
- (NSMutableDictionary *) dictionaryForChildren;
@end


TreeNode.m

#import "TreeNode.h"
// String stripper utility macro
#define STRIP(X) [X stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]
@implementation TreeNode
@synthesize parent;
@synthesize children;
@synthesize key;
@synthesize leafvalue;
#pragma mark Create and Initialize TreeNodes
- (TreeNode *) init
{
if (self = [super init])
{
self.key = nil;
self.leafvalue = nil;
self.parent = nil;
self.children = nil;
}
return self;
}
+ (TreeNode *) treeNode
{
return [[self alloc] init];
}
#pragma mark TreeNode type routines
- (BOOL) isLeaf
{
return (self.children.count == 0);
}
- (BOOL) hasLeafValue
{
return (self.leafvalue != nil);
}
#pragma mark TreeNode data recovery routines
// Return an array of child keys. No recursion
- (NSArray *) keys
{
NSMutableArray *results = [NSMutableArray array];
for (TreeNode *node in self.children) [results addObject:node.key];
return results;
}
// Return an array of child keys with depth-first recursion.
- (NSArray *) allKeys
{
NSMutableArray *results = [NSMutableArray array];
for (TreeNode *node in self.children)
{
[results addObject:node.key];
[results addObjectsFromArray:node.allKeys];
}
return results;
}
- (NSArray *) uniqArray: (NSArray *) anArray
{
NSMutableArray *array = [NSMutableArray array];
for (id object in [anArray sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)])
if (![[array lastObject] isEqualToString:object]) [array addObject:object];
return array;
}
// Return a sorted, uniq array of child keys. No recursion

- (NSArray *) uniqKeys
{
return [self uniqArray:[self keys]];
}
// Return a sorted, uniq array of child keys. With depth-first recursion

- (NSArray *) uniqAllKeys
{
return [self uniqArray:[self allKeys]];
}
// Return an array of child leaves. No recursion

- (NSArray *) leaves
{
NSMutableArray *results = [NSMutableArray array];
for (TreeNode *node in self.children) if (node.leafvalue) [results addObject:node.leafvalue];
return results;
}
// Return an array of child leaves with depth-first recursion.

- (NSArray *) allLeaves
{
NSMutableArray *results = [NSMutableArray array];
for (TreeNode *node in self.children)
{
if (node.leafvalue) [results addObject:node.leafvalue];
[results addObjectsFromArray:node.allLeaves];
}
return results;
}
#pragma mark TreeNode search and retrieve routines
// Return the first child that matches the key, searching recursively breadth first
- (TreeNode *) objectForKey: (NSString *) aKey
{
TreeNode *result = nil;
for (TreeNode *node in self.children)
if ([node.key isEqualToString: aKey])
{
result = node;
break;
}
if (result) return result;
for (TreeNode *node in self.children)
{
result = [node objectForKey:aKey];
if (result) break;
}
return result;
}
// Return the first leaf whose key is a match, searching recursively breadth first

- (NSString *) leafForKey: (NSString *) aKey
{
TreeNode *node = [self objectForKey:aKey];
return node.leafvalue;
}
// Return all children that match the key, including recursive depth first search.

- (NSMutableArray *) objectsForKey: (NSString *) aKey
{
NSMutableArray *result = [NSMutableArray array];
for (TreeNode *node in self.children)
{
if ([node.key isEqualToString: aKey])
[result addObject:node];
[result addObjectsFromArray:[node objectsForKey:aKey]];
}
return result;
}
// Return all leaves that match the key, including recursive depth first search.

- (NSMutableArray *) leavesForKey: (NSString *) aKey
{
NSMutableArray *result = [NSMutableArray array];
for (TreeNode *node in [self objectsForKey:aKey])
if (node.leafvalue)
[result addObject:node.leafvalue];
return result;
}
// Follow a key path that matches each first found branch, returning object

- (TreeNode *) objectForKeys: (NSArray *) keys

{
if ([keys count] == 0) return self;
NSMutableArray *nextArray = [NSMutableArray arrayWithArray:keys];
[nextArray removeObjectAtIndex:0];
for (TreeNode *node in self.children)
{
if ([node.key isEqualToString:[keys objectAtIndex:0]])
return [node objectForKeys:nextArray];
}
return nil;
}
//获取指定节点下的所有子节点
- (NSMutableArray *) childrenForKeys: (NSArray *) keys
{
TreeNode *fathernode = [self objectForKeys:keys];
NSMutableArray *result = [NSMutableArray array];
for (TreeNode *node in fathernode.children)
{
NSMutableDictionary * dictionary = [[NSMutableDictionary alloc] init];

dictionary = [node dictionaryForChildren];
[result addObject:dictionary];
// [result addObjectsFromArray:[node childrenForKeys:keys]];
}
return result;
}

// Follow a key path that matches each first found branch, returning leaf

- (NSString *) leafForKeys: (NSArray *) keys
{
TreeNode *node = [self objectForKeys:keys];
return node.leafvalue;
}
#pragma mark output utilities
// Print out the tree

- (void) dumpAtIndent: (int) indent into:(NSMutableString *) outstring
{
for (int i = 0; i < indent; i++) [outstring appendString:@"--"];
[outstring appendFormat:@"[%2d] Key: %@ ", indent, key];
if (self.leafvalue) [outstring appendFormat:@"(%@)", STRIP(self.leafvalue)];
[outstring appendString:@"\n"];
for (TreeNode *node in self.children) [node dumpAtIndent:indent + 1 into: outstring];
}
- (NSString *) dump
{
NSMutableString *outstring = [[NSMutableString alloc] init];
[self dumpAtIndent:0 into:outstring];
return outstring ;
}
#pragma mark conversion utilities
// When you're sure you're the parent of all leaves, transform to a dictionary

- (NSMutableDictionary *) dictionaryForChildren
{
NSMutableDictionary *results = [NSMutableDictionary dictionary];
for (TreeNode *node in self.children)
if (node.hasLeafValue) [results setObject:node.leafvalue forKey:node.key];
return results;
}
#pragma mark invocation forwarding
// Invocation Forwarding lets node act like array

- (id)forwardingTargetForSelector:(SEL)sel
{
if ([self.children respondsToSelector:sel]) return self.children;
return nil;
}
// Extend selector compliance
- (BOOL)respondsToSelector:(SEL)aSelector

{
if ( [super respondsToSelector:aSelector] ) return YES;
if ([self.children respondsToSelector:aSelector]) return YES;
return NO;
}
// Allow posing as NSArray class for children
- (BOOL)isKindOfClass:(Class)aClass

{
if (aClass == [TreeNode class]) return YES;
if ([super isKindOfClass:aClass]) return YES;
if ([self.children isKindOfClass:aClass]) return YES;
return NO;
}
#pragma mark cleanup

- (void) teardown
{
for (TreeNode *node in [self.children copy]) [node teardown];
[self.parent.children removeObject:self];
self.parent = nil;
}

- (void) dealloc
{
self.parent = nil;
self.children = nil;
self.key = nil;
self.leafvalue = nil;

}
@end

调用接口获取xml数据并解析xml：
anticounterfeitSections = [[NSMutableArray alloc] initWithObjects:nil];//用来与UITableViewSection对应
[anticounterfeitSections addObject:@""];
webservice *service= [[webservice alloc] init];
NSDictionary *info = [NSDictionary dictionaryWithObjectsAndKeys:
value,@"key",
nil];//请求参数
NSURL *strurl = [NSURL URLWithString:urlString];//请求网址 NSURL类型
//完成Json格式後，進行新增
TreeNode *refdata= [[TreeNode alloc] init];
refdata=[service insertCatalogWithJson:strurl send:info];//将请求到的数据以TreeNode格式存放到refdata
service=nil;//请求完毕后，释放webservice类
//[NSThread sleepForTimeInterval:3];
NSMutableDictionary * rootdic = [refdata dictionaryForChildren];//根目录下面的节点集
NSLog(@"info=%@",[rootdic objectForKey:@"Info"]);//打印该节点集里面的名称为Info的节点的value
NSMutableArray *test = [[NSMutableArray alloc] initWithObjects:
@"items",
nil];//定义一个名称为items的节点集
//获取地址列表
NSMutableArray * test1 = [refdata childrenForKeys:test];//从该节点集里面读取到名称为items的节点集
refdata=nil;//释放
NSMutableArray *demaxiyaHeros = [[NSMutableArray alloc] init];
NSLog(@"%@",test1);
if ([[rootdic objectForKey:@"isSuccess"] isEqualToString:@"1"]) {
for (NSMutableDictionary *dic in test1) {
//to-do
}
anticounterfeitData = [[NSMutableArray alloc] initWithObjects:demaxiyaHeros, nil];//将items里面的每个item解析并放入NSMutableArray类型中
}