NSMutableArray addObject使iPhone应用程序崩溃_Iphone_Objective C_Cocoa Touch

NSMutableArray addObject使iPhone应用程序崩溃

iphone objective-c cocoa-touch

NSMutableArray addObject使iPhone应用程序崩溃,iphone,objective-c,cocoa-touch,Iphone,Objective C,Cocoa Touch,我有一个XMLParser类。只要我不删除将节点添加到NSMutableArray的行的注释，它就可以正常工作： [nodes addObject:self.currentNode]; 如果我这样做，应用程序就会崩溃，而不会在调试日志中留下任何跟踪。这怎么可能 XMLParser.m: #import "XMLParser.h" #import "MyViewController.h" #import "Node.h" @implementation XMLParser @synthes

我有一个XMLParser类。只要我不删除将节点添加到NSMutableArray的行的注释，它就可以正常工作：

[nodes addObject:self.currentNode];

如果我这样做，应用程序就会崩溃，而不会在调试日志中留下任何跟踪。这怎么可能

XMLParser.m:

#import "XMLParser.h"
#import "MyViewController.h"
#import "Node.h"


@implementation XMLParser
@synthesize currentNode, currentProperty, currentAddress, nodes;


- (NSMutableArray *)parseNodeData:(NSString *)url {
    NSURL *urlObj = [[NSURL alloc] initWithString:url];
    NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:urlObj];

    self.nodes = [[NSMutableArray alloc] init];

    [parser setDelegate:self];
    [parser setShouldProcessNamespaces:NO];
    [parser setShouldReportNamespacePrefixes:NO];
    [parser setShouldResolveExternalEntities:NO];
    [parser parse];
    NSLog(@"Proceeded from parser.");

    NSLog(@"Returning %@ rows", [nodes count]);
    //[parser release];
    return self.nodes;
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    if (self.currentProperty) {
        [currentProperty appendString:string];
    }
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
    if (qName) {
        elementName = qName;
    }

    NSLog(@"<%@>", elementName);

    if(self.currentNode)
    {
        if ([elementName isEqualToString:@"id"] || [elementName isEqualToString:@"name"])
        {
            self.currentProperty = [NSMutableString string];
        }
    } else {
        // We are outside of everything, so we need a
        // Check for deeper nested node
        if ([elementName isEqualToString:@"node"]) {
            self.currentNode = [[Node alloc] init];
            NSLog(@"Initialized new node...");
        }
    }
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if(self.currentNode)
    {
        if ([elementName isEqualToString:@"id"]) {
            NSLog(@"Tried setting node id: %@", self.currentProperty);
            self.currentNode.nodeId = self.currentProperty;

        } else if ([elementName isEqualToString:@"name"]) {
            NSLog(@"Tried setting node name: %@", self.currentProperty);
            self.currentNode.name = self.currentProperty;
        } else if ([elementName isEqualToString:@"node"]) {
            NSLog(@"Adding node to array");
            //[nodes addObject:self.currentNode];
            self.currentNode = nil;
        }
    }

    NSLog(@"</%@>", elementName);

    self.currentProperty = nil;
}

- (void) dealloc {
    [currentNode release];
    [currentAddress release];
    [currentProperty release];
    [super dealloc];
}


@end

#import <UIKit/UIKit.h>
#import "Address.h"
#import "Node.h"

@class XMLAppDelegate;

@interface XMLParser : NSObject {
    NSMutableString *currentProperty;
    Address *currentAddress;
    Node *currentNode;
    NSMutableArray *nodes;

}

@property (nonatomic, retain) NSMutableString *currentProperty;
@property (nonatomic, retain) Address *currentAddress;
@property (nonatomic, retain) Node *currentNode;
@property (nonatomic, retain) NSMutableArray *nodes;

- (NSMutableArray *)parseNodeData:(NSString *)data;

@end

导入“XMLParser.h” #导入“MyViewController.h” #导入“Node.h” @XMLParser的实现 @综合currentNode、currentProperty、currentAddress、nodes； -（NSMutableArray*）parseNodeData:（NSString*）url{ NSURL*urlObj=[[NSURL alloc]initWithString:url]； NSXMLParser*parser=[[NSXMLParser alloc]initwithcontentsofull:urlObj]； self.nodes=[[NSMutableArray alloc]init]； [解析器setDelegate:self]； [解析器setShouldProcessNamespaces:否]； [解析器setShouldReportNamespacePrefixes:否]； [解析器setShouldResolveExternalEntities:否]； [语法分析器解析]； NSLog（@“源于解析器”）； NSLog（@“返回%@行，[节点计数]）； //[解析器发布]；返回self.nodes； } -（void）解析器：（NSXMLParser*）解析器查找字符：（NSString*）字符串 { if（self.currentProperty）{ [currentProperty appendString:string]； } } -（void）parser:（NSXMLParser*）parser didStartElement:（NSString*）elementName namespaceURI:（NSString*）namespaceURI qualifiedName:（NSString*）qName属性：（NSDictionary*）attributeDict{ 如果（qName）{ elementName=qName； } NSLog（@“”，元素名称）； if（self.currentNode） { if（[elementName IsequalString:@“id”]| |[elementName IsequalString:@“name”]） { self.currentProperty=[NSMutableString]； } }否则{ //我们置身于一切之外，所以我们需要一个 //检查是否有更深的嵌套节点 if（[elementName IsequalString:@“node”]）{ self.currentNode=[[Node alloc]init]； NSLog（@“已初始化新节点…”）； } } } -（void）parser:（NSXMLParser*）parser didEndElement:（NSString*）elementName namespaceURI:（NSString*）namespaceURI qualifiedName:（NSString*）qName { if（self.currentNode） { if（[elementName IsequalString:@“id”]）{ NSLog（@“尝试设置节点id:%@”，self.currentProperty）； self.currentNode.nodeId=self.currentProperty； }else if（[elementName IsequalString:@“name”]）{ NSLog（@“尝试设置节点名称：%@”，self.currentProperty）； self.currentNode.name=self.currentProperty； }else if（[elementName IsequalString:@“node”]）{ NSLog（@“将节点添加到阵列”）； //[nodes addObject:self.currentNode]； self.currentNode=nil； } } NSLog（@“”，元素名称）； self.currentProperty=nil； } -（无效）解除锁定{ [当前节点释放]； [当前地址发布]； [currentProperty release]； [super dealoc]； } @结束 XMLParser.h:

#import "XMLParser.h"
#import "MyViewController.h"
#import "Node.h"


@implementation XMLParser
@synthesize currentNode, currentProperty, currentAddress, nodes;


- (NSMutableArray *)parseNodeData:(NSString *)url {
    NSURL *urlObj = [[NSURL alloc] initWithString:url];
    NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:urlObj];

    self.nodes = [[NSMutableArray alloc] init];

    [parser setDelegate:self];
    [parser setShouldProcessNamespaces:NO];
    [parser setShouldReportNamespacePrefixes:NO];
    [parser setShouldResolveExternalEntities:NO];
    [parser parse];
    NSLog(@"Proceeded from parser.");

    NSLog(@"Returning %@ rows", [nodes count]);
    //[parser release];
    return self.nodes;
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    if (self.currentProperty) {
        [currentProperty appendString:string];
    }
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
    if (qName) {
        elementName = qName;
    }

    NSLog(@"<%@>", elementName);

    if(self.currentNode)
    {
        if ([elementName isEqualToString:@"id"] || [elementName isEqualToString:@"name"])
        {
            self.currentProperty = [NSMutableString string];
        }
    } else {
        // We are outside of everything, so we need a
        // Check for deeper nested node
        if ([elementName isEqualToString:@"node"]) {
            self.currentNode = [[Node alloc] init];
            NSLog(@"Initialized new node...");
        }
    }
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if(self.currentNode)
    {
        if ([elementName isEqualToString:@"id"]) {
            NSLog(@"Tried setting node id: %@", self.currentProperty);
            self.currentNode.nodeId = self.currentProperty;

        } else if ([elementName isEqualToString:@"name"]) {
            NSLog(@"Tried setting node name: %@", self.currentProperty);
            self.currentNode.name = self.currentProperty;
        } else if ([elementName isEqualToString:@"node"]) {
            NSLog(@"Adding node to array");
            //[nodes addObject:self.currentNode];
            self.currentNode = nil;
        }
    }

    NSLog(@"</%@>", elementName);

    self.currentProperty = nil;
}

- (void) dealloc {
    [currentNode release];
    [currentAddress release];
    [currentProperty release];
    [super dealloc];
}


@end

#import <UIKit/UIKit.h>
#import "Address.h"
#import "Node.h"

@class XMLAppDelegate;

@interface XMLParser : NSObject {
    NSMutableString *currentProperty;
    Address *currentAddress;
    Node *currentNode;
    NSMutableArray *nodes;

}

@property (nonatomic, retain) NSMutableString *currentProperty;
@property (nonatomic, retain) Address *currentAddress;
@property (nonatomic, retain) Node *currentNode;
@property (nonatomic, retain) NSMutableArray *nodes;

- (NSMutableArray *)parseNodeData:(NSString *)data;

@end

#导入
#导入“Address.h”
#导入“Node.h”
@类XMLAppDelegate；
@接口XMLParser:NSObject{
NSMutableString*currentProperty；
地址*当前地址；
节点*当前节点；
NSMutableArray*节点；
}
@属性（非原子，保留）NSMutableString*currentProperty；
@属性（非原子，保留）地址*当前地址；
@属性（非原子，保留）节点*currentNode；
@属性（非原子，保留）NSMutableArray*节点；
-（NSMutableArray*）parseNodeData:（NSString*）数据；
@结束

编辑：调试日志的输出

[Session started at 2009-05-26 23:31:26 +0200.] 2009-05-26 23:31:28.352 HelloWorld[6914:20b] <response> 2009-05-26 23:31:28.353 HelloWorld[6914:20b] <nodesearchresult> 2009-05-26 23:31:28.354 HelloWorld[6914:20b] <resultsreturned> 2009-05-26 23:31:28.354 HelloWorld[6914:20b] </resultsreturned> 2009-05-26 23:31:28.354 HelloWorld[6914:20b] <resultsfound> 2009-05-26 23:31:28.354 HelloWorld[6914:20b] </resultsfound> 2009-05-26 23:31:28.355 HelloWorld[6914:20b] <nodes> 2009-05-26 23:31:28.355 HelloWorld[6914:20b] <node> 2009-05-26 23:31:28.356 HelloWorld[6914:20b] Initialized new node... 2009-05-26 23:31:28.356 HelloWorld[6914:20b] <id> 2009-05-26 23:31:28.356 HelloWorld[6914:20b] Tried setting node id: 614 2009-05-26 23:31:28.356 HelloWorld[6914:20b] </id> 2009-05-26 23:31:28.357 HelloWorld[6914:20b] <name> 2009-05-26 23:31:28.357 HelloWorld[6914:20b] Tried setting node name: Roberts coffee 2009-05-26 23:31:28.357 HelloWorld[6914:20b] </name> 2009-05-26 23:31:28.358 HelloWorld[6914:20b] <address> 2009-05-26 23:31:28.358 HelloWorld[6914:20b] <street> 2009-05-26 23:31:28.358 HelloWorld[6914:20b] </street> 2009-05-26 23:31:28.358 HelloWorld[6914:20b] <zipcode> 2009-05-26 23:31:28.359 HelloWorld[6914:20b] </zipcode> 2009-05-26 23:31:28.359 HelloWorld[6914:20b] </address> 2009-05-26 23:31:28.359 HelloWorld[6914:20b] <position> 2009-05-26 23:31:28.359 HelloWorld[6914:20b] <latitude> 2009-05-26 23:31:28.360 HelloWorld[6914:20b] </latitude> 2009-05-26 23:31:28.360 HelloWorld[6914:20b] <longitude> 2009-05-26 23:31:28.360 HelloWorld[6914:20b] </longitude> 2009-05-26 23:31:28.361 HelloWorld[6914:20b] </position> 2009-05-26 23:31:28.361 HelloWorld[6914:20b] <phone> 2009-05-26 23:31:28.361 HelloWorld[6914:20b] </phone> 2009-05-26 23:31:28.363 HelloWorld[6914:20b] <nodetypes> 2009-05-26 23:31:28.363 HelloWorld[6914:20b] <nodetype> 2009-05-26 23:31:28.363 HelloWorld[6914:20b] </nodetype> 2009-05-26 23:31:28.364 HelloWorld[6914:20b] </nodetypes> 2009-05-26 23:31:28.364 HelloWorld[6914:20b] <rating> 2009-05-26 23:31:28.364 HelloWorld[6914:20b] <score> 2009-05-26 23:31:28.365 HelloWorld[6914:20b] </score> 2009-05-26 23:31:28.365 HelloWorld[6914:20b] <votes> 2009-05-26 23:31:28.366 HelloWorld[6914:20b] </votes> 2009-05-26 23:31:28.366 HelloWorld[6914:20b] </rating> 2009-05-26 23:31:28.366 HelloWorld[6914:20b] <teaser> 2009-05-26 23:31:28.367 HelloWorld[6914:20b] </teaser> 2009-05-26 23:31:28.367 HelloWorld[6914:20b] Adding node to array 2009-05-26 23:31:28.367 HelloWorld[6914:20b] </node> 2009-05-26 23:31:28.367 HelloWorld[6914:20b] <node> 2009-05-26 23:31:28.368 HelloWorld[6914:20b] Initialized new node... 2009-05-26 23:31:28.368 HelloWorld[6914:20b] <id> 2009-05-26 23:31:28.368 HelloWorld[6914:20b] Tried setting node id: 326 2009-05-26 23:31:28.368 HelloWorld[6914:20b] </id> 2009-05-26 23:31:28.369 HelloWorld[6914:20b] <name> 2009-05-26 23:31:28.369 HelloWorld[6914:20b] Tried setting node name: Sort kaffe & vinyl 2009-05-26 23:31:28.369 HelloWorld[6914:20b] </name> 2009-05-26 23:31:28.369 HelloWorld[6914:20b] <address> 2009-05-26 23:31:28.370 HelloWorld[6914:20b] <street> 2009-05-26 23:31:28.370 HelloWorld[6914:20b] </street> 2009-05-26 23:31:28.371 HelloWorld[6914:20b] <zipcode> 2009-05-26 23:31:28.371 HelloWorld[6914:20b] </zipcode> 2009-05-26 23:31:28.372 HelloWorld[6914:20b] </address> 2009-05-26 23:31:28.372 HelloWorld[6914:20b] <position> 2009-05-26 23:31:28.372 HelloWorld[6914:20b] <latitude> 2009-05-26 23:31:28.373 HelloWorld[6914:20b] </latitude> 2009-05-26 23:31:28.373 HelloWorld[6914:20b] <longitude> 2009-05-26 23:31:28.373 HelloWorld[6914:20b] </longitude> 2009-05-26 23:31:28.374 HelloWorld[6914:20b] </position> 2009-05-26 23:31:28.374 HelloWorld[6914:20b] <phone> 2009-05-26 23:31:28.375 HelloWorld[6914:20b] </phone> 2009-05-26 23:31:28.375 HelloWorld[6914:20b] <nodetypes> 2009-05-26 23:31:28.375 HelloWorld[6914:20b] <nodetype> 2009-05-26 23:31:28.375 HelloWorld[6914:20b] </nodetype> 2009-05-26 23:31:28.376 HelloWorld[6914:20b] <nodetype> 2009-05-26 23:31:28.376 HelloWorld[6914:20b] </nodetype> 2009-05-26 23:31:28.376 HelloWorld[6914:20b] </nodetypes> 2009-05-26 23:31:28.376 HelloWorld[6914:20b] <rating> 2009-05-26 23:31:28.377 HelloWorld[6914:20b] <score> 2009-05-26 23:31:28.377 HelloWorld[6914:20b] </score> 2009-05-26 23:31:28.377 HelloWorld[6914:20b] <votes> 2009-05-26 23:31:28.377 HelloWorld[6914:20b] </votes> 2009-05-26 23:31:28.378 HelloWorld[6914:20b] </rating> 2009-05-26 23:31:28.378 HelloWorld[6914:20b] <teaser> 2009-05-26 23:31:28.379 HelloWorld[6914:20b] </teaser> 2009-05-26 23:31:28.379 HelloWorld[6914:20b] Adding node to array 2009-05-26 23:31:28.379 HelloWorld[6914:20b] </node> 2009-05-26 23:31:28.380 HelloWorld[6914:20b] </nodes> 2009-05-26 23:31:28.380 HelloWorld[6914:20b] </nodesearchresult> 2009-05-26 23:31:28.381 HelloWorld[6914:20b] </response> 2009-05-26 23:31:28.381 HelloWorld[6914:20b] Proceeded from parser. [Session started at 2009-05-26 23:31:28 +0200.] Loading program into debugger… GNU gdb 6.3.50-20050815 (Apple version gdb-962) (Sat Jul 26 08:14:40 UTC 2008) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-apple-darwin".warning: Unable to read symbols for "/System/Library/Frameworks/UIKit.framework/UIKit" (file not found). warning: Unable to read symbols from "UIKit" (not yet mapped into memory). warning: Unable to read symbols for "/System/Library/Frameworks/CoreLocation.framework/Versions/A/CoreLocation" (file not found). warning: Unable to read symbols from "CoreLocation" (not yet mapped into memory). warning: Unable to read symbols for "/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics" (file not found). warning: Unable to read symbols from "CoreGraphics" (not yet mapped into memory). Program loaded. sharedlibrary apply-load-rules all Attaching to program: `/Users/philipdahlstrm/Library/Application Support/iPhone Simulator/User/Applications/6BD1CC99-F133-4B97-A041-1D210851B6C6/HelloWorld.app/HelloWorld', process 6914. (gdb)

[会话于2009-05-26 23:31:26+0200开始。] 2009-05-26 23:31:28.352 HelloWorld[6914:20b] 2009-05-26 23:31:28.353希腊世界[6914:20b] 2009-05-26 23:31:28.354 HelloWorld[6914:20b] 2009-05-26 23:31:28.354 HelloWorld[6914:20b] 2009-05-26 23:31:28.354 HelloWorld[6914:20b] 2009-05-26 23:31:28.354 HelloWorld[6914:20b] 2009-05-26 23:31:28.355 HelloWorld[6914:20b] 2009-05-26 23:31:28.355 HelloWorld[6914:20b] 2009-05-26 23:31:28.356 HelloWorld[6914:20b]已初始化新节点。。。 2009-05-26 23:31:28.356 HelloWorld[6914:20b] 2009-05-26 23:31:28.356 HelloWorld[6914:20b]已尝试设置节点id:614 2009-05-26 23:31:28.356 HelloWorld[6914:20b] 2009-05-26 23:31:28.357 HelloWorld[6914:20b] 2009-05-26 23:31:28.357 HelloWorld[6914:20b]尝试设置节点名称：Roberts coffee 2009-05-26 23:31:28.357 HelloWorld[6914:20b] 2009-05-26 23:31:28.358 HelloWorld[6914:20b] 2009-05-26 23:31:28.358 HelloWorld[6914:20b] 2009-05-26 23:31:28.358 HelloWorld[6914:20b] 2009-05-26 23:31:28.358 HelloWorld[6914:20b] 2009-05-26 23:31:28.359 HelloWorld[6914:20b] 2009-05-26 23:31:28.359 HelloWorld[6914:20b] 2009-05-26 23:31:28.359 HelloWorld[6914:20b] 2009-05-26 23:31:28.359 HelloWorld[6914:20b] 2009-05-26 23:31:28.360 HelloWorld[6914:20b] 2009-05-26 23:31:28.360 HelloWorld[6914:20b] 2009-05-26 23:31:28.360 HelloWorld[6914:20b] 2009-05-26 23:31:28.361希腊世界[6914:20b] 2009-05-26 23:31:28.361希腊世界[6914:20b] 2009-05-26 23:31:28.361希腊世界[6914:20b] 2009-05-26 23:31:28.363希腊世界[6914:20b] 2009-05-26 23:31:28.363希腊世界[6914:20b] 2009-05-26 23:31:28.363希腊世界[6914:20b] 2009-05-26 23:31:28.364希腊世界[6914:20b] 2009-05-26 23:31:28.364希腊世界[6914:20b] 2009-05-26 23:31:28.364希腊世界[6914:20b] 2009-05-26 23:31:28.365 HelloWorld[6914:20b] 2009-05-26 23:31:28.365 HelloWorld[6914:20b] 2009-05-26 23:31:28.366 HelloWorld[6914:20b] 2009-05-26 23:31:28.366 HelloWorld[6914:20b] 2009-05-26 23:31:28.366 HelloWorld[6914:20b] 2009-05-26 23:31:28.367希腊世界[6914:20b] 2009-05-26 23:31:28.367 HelloWorld[6914:20b]向阵列添加节点 2009-05-26 23:31:28.367希腊世界[6914:20b] 2009-05-26 23:31:28.367希腊世界[6914:20b] 2009-05-26 23:31:28.368 HelloWorld[6914:20b]已初始化新节点。。。 2009-05-26 23:31:28.368希腊世界[6914:20b] 2009-05-26 23:31:28.368 HelloWorld[6914:20b]已尝试设置节点id:326 2009-05-26 23:31:28.368希腊世界[6914:20b] 2009-05-26 23:31:28.369 HelloWorld[6914 self.currentNode = [[[Node alloc] init] autorelease];