我的应用程序运行良好，我现在唯一的问题是实时数据查看器，如果没有发生任何事情，XML文件为空，如果它有2或2000个事件，应用程序现在不显示任何内容正在发生，它显示在我的实时数据查看器中，如果只有一个事件发生，当我到达那个视图时，我的应用程序崩溃。
我比较了XML结构，它们对于1或2个事件是相同的。
我在下面包含了我的XML解析器方法，我的cellForRowAtIndexPath和我的numberOfRows方法。
那里有人可以看到问题是什么吗？我再次提醒你，如果我的XML文件只有一个Match节点，这只会崩溃。适用于0或100000，但不适用于1。
最后你还会找到崩溃报告，我希望它有助于找到问题并修复它。
谢谢。
-(void) parseXMLLiveMatch
{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"something.xml"]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *xmlString = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
NSDictionary *xml = [NSDictionary dictionaryWithXMLString:xmlString];
NSMutableArray *items = [xml objectForKey:@"Match"];
NSMutableArray *newLiveMatchArray = [[NSMutableArray alloc] init];
for (NSDictionary *dict in items) {
NSLog(@"%@ %@", [dict class], dict);
LiveMatchObject *myMatches = [LiveMatchObject matchesFromXMLDictionary:dict];
[newLiveMatchArray addObject:myMatches];
}
NSNull *nullValue = [NSNull null];
[newLiveMatchArray insertObject:nullValue atIndex:0];
[self setTableDataLiveMatch:newLiveMatchArray];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"LiveIdent";
LiveViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
LiveMatchObject *item = [tableDataLiveMatch objectAtIndex:(int)([indexPath row]/2)];
...
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return tableDataLiveMatch.count * 2;
}
2014-02-17 14:40:56.419 Liga Zon Sagres Companion[2539:70b] __NSCFString HomeGoals
2014-02-17 14:40:56.420 Liga Zon Sagres Companion[2539:70b] -[__NSCFString objectForKeyedSubscript:]: unrecognized selector sent to instance 0x10d03d7f0
2014-02-17 14:40:56.424 Liga Zon Sagres Companion[2539:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString objectForKeyedSubscript:]: unrecognized selector sent to instance 0x10d03d7f0'
*** First throw call stack:
(
0 CoreFoundation 0x00000001019df795 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000101742991 objc_exception_throw + 43
2 CoreFoundation 0x0000000101a70bad -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00000001019d109d ___forwarding___ + 973
4 CoreFoundation 0x00000001019d0c48 _CF_forwarding_prep_0 + 120
5 Liga Zon Sagres Companion 0x00000001000014da +[LiveMatchObject matchesFromXMLDictionary:] + 138
6 Liga Zon Sagres Companion 0x0000000100003da6 -[LiveTableViewController parseXMLLiveMatch] + 790
7 Liga Zon Sagres Companion 0x0000000100003a48 -[LiveTableViewController viewWillAppear:] + 88
8 UIKit 0x00000001004943f4 -[UIViewController _setViewAppearState:isAnimating:] + 394
9 UIKit 0x00000001004c0ce5 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 524
10 UIKit 0x00000001004bd155 -[UITabBarController _setSelectedViewController:] + 259
11 UIKit 0x00000001004c046c -[UITabBarController _tabBarItemClicked:] + 248
12 UIKit 0x00000001003a6096 -[UIApplication sendAction:to:from:forEvent:] + 80
13 UIKit 0x00000001003a6044 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 17
14 UIKit 0x00000001005fb4cc -[UITabBar _sendAction:withEvent:] + 420
15 UIKit 0x00000001003a60ae -[UIApplication sendAction:to:from:forEvent:] + 104
16 UIKit 0x00000001003a6044 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 17
17 UIKit 0x000000010047a450 -[UIControl _sendActionsForEvents:withEvent:] + 203
18 UIKit 0x00000001003a6096 -[UIApplication sendAction:to:from:forEvent:] + 80
19 UIKit 0x00000001003a6044 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 17
20 UIKit 0x000000010047a450 -[UIControl _sendActionsForEvents:withEvent:] + 203
21 UIKit 0x00000001004799c0 -[UIControl touchesEnded:withEvent:] + 530
22 UIKit 0x00000001003dac15 -[UIWindow _sendTouchesForEvent:] + 701
23 UIKit 0x00000001003db633 -[UIWindow sendEvent:] + 988
24 UIKit 0x00000001003b4fa2 -[UIApplication sendEvent:] + 211
25 UIKit 0x00000001003a2d7f _UIApplicationHandleEventQueue + 9549
26 CoreFoundation 0x000000010196eec1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
27 CoreFoundation 0x000000010196e792 __CFRunLoopDoSources0 + 242
28 CoreFoundation 0x000000010198a61f __CFRunLoopRun + 767
29 CoreFoundation 0x0000000101989f33 CFRunLoopRunSpecific + 467
30 GraphicsServices 0x000000010300b3a0 GSEventRunModal + 161
31 UIKit 0x00000001003a5043 UIApplicationMain + 1010
32 Liga Zon Sagres Companion 0x000000010001fce3 main + 115
33 libdyld.dylib 0x000000010232b5fd start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
干杯谢谢。
如被要求：
@implementation LiveMatchObject
@synthesize homeGoals, awayGoals, homeName, awayName, matchDate, matchMinute, matchStatus, homeTeamLogo, awayTeamLogo, spectators, round, homeStartingGoalie, homeStartingDefense, homeStartingMiddlefield, homeStartingFoward, homeFormation, awayStartingGoalie, awayStartingDefense, awayStartingMiddlefield, awayStartingFoward, awayFormation;
+(LiveMatchObject *)matchesFromXMLDictionary:(NSDictionary *)dict{
LiveMatchObject *object =[[LiveMatchObject alloc]init];
object.homeGoals = dict[@"HomeGoals"];
object.awayGoals = dict[@"AwayGoals"];
object.homeName = dict[@"Hometeam"];
object.awayName = dict[@"Awayteam"];
object.matchDate = dict[@"Date"];
object.matchMinute = dict[@"Time"];
object.matchStatus = [UIImage imageNamed:dict[@"Time"]];
object.homeTeamLogo = [UIImage imageNamed:dict[@"HomeTeam_Id"]];
object.awayTeamLogo = [UIImage imageNamed:dict[@"AwayTeam_Id"]];
object.spectators = dict[@"Spectators"];
object.round = dict[@"Round"];
object.homeFormation = dict[@"HomeTeamFormation"];
object.homeStartingGoalie = dict[@"HomeLineupGoalkeeper"];
object.homeStartingMiddlefield = dict[@"HomeLineupMidfield"];
object.homeStartingFoward = dict[@"HomeLineupForward"];
object.awayFormation = dict[@"AwayTeamFormation"];
object.awayStartingGoalie = dict[@"AwayLineupGoalkeeper"];
object.awayStartingMiddlefield = dict[@"AwayLineupMidfield"];
object.awayStartingFoward = dict[@"AwayLineupForward"];
return object;
}
@end
XML
<CREPERR.COM >
<Match>
<Id>327080</Id>
<Date>2014-02-17T12:00:00-08:00</Date>
<League>Primeira Liga</League>
<Round>19</Round>
<Spectators/>
<Hometeam>Estoril-Praia</Hometeam>
<HomeTeam_Id>529</HomeTeam_Id>
<Awayteam>Braga</Awayteam>
<AwayTeam_Id>521</AwayTeam_Id>
<Time>9'</Time>
<HomeGoals>0</HomeGoals>
<AwayGoals>0</AwayGoals>
<HomeGoalDetails/>
<AwayGoalDetails/>
<HomeLineupGoalkeeper>Vagner</HomeLineupGoalkeeper>
<AwayLineupGoalkeeper>Eduardo</AwayLineupGoalkeeper>
<HomeLineupDefense>Yohan Tavares; Mano; Babanco; Ruben;</HomeLineupDefense>
<AwayLineupDefense>
Nurio; Aleksandar Miljkovic; Nuno André Coelho; Vincent Sasso;
</AwayLineupDefense>
<HomeLineupMidfield>
Javier Balboa; Goebel Evandro; Carlitos; Diogo Amado; Goncalo;
</HomeLineupMidfield>
<AwayLineupMidfield>
Custodio; Mauro; Leandro Kappel; Felipe Pardo; Alan;
</AwayLineupMidfield>
<HomeLineupForward>Seba;</HomeLineupForward>
<AwayLineupForward>Raul Andrei Rusescu;</AwayLineupForward>
<HomeSubDetails/>
<AwaySubDetails/>
<HomeTeamFormation>4-2-3-1</HomeTeamFormation>
<AwayTeamFormation>4-2-3-1</AwayTeamFormation>
<Location>Estádio António Coimbra da Mota</Location>
<Stadium>Estádio António Coimbra da Mota</Stadium>
<HomeTeamYellowCardDetails/>
<AwayTeamYellowCardDetails/>
<HomeTeamRedCardDetails/>
<AwayTeamRedCardDetails/>
</Match>
<AccountInformation>
Data requested at 2/17/2014
</AccountInformation>
</CREPERR.COM>
答案 0 :(得分：0)
您正在崩溃，因为当数组中只有一个对象时，dict对象是NSString，而不是NSDictionary。 NSString未响应string[@"Something"]界面，因此会导致您的应用程序崩溃。
测试此方法的一种方法是：
+(LiveMatchObject *)matchesFromXMLDictionary:(NSDictionary *)dict{
if([dict isKindOfClass:[NSDictionary class]])
{
//This is a valid dictionary
}
else
{
//This is not a dictionary object, do something different
}
}
为什么你在这里得到NSString而不是NSDictionary我不知道，你如何处理它以同样的方式获取数据是另一个问题。你将不得不在那里设置一个断点，看看你得到了什么NSString以及如何处理它。