当我尝试将对象添加到NSMutableArray时,我得到“ - [__ NSArrayI addObject:]:发送到实例0x10dd15ee0的无法识别的选择器”。我不知道为什么。添加对象到NSMutableArray属性崩溃与无法识别的选择器?
我有一组嵌套的自定义类。 WTEvent有一个名为mats的NSMutableArray属性,它由WTMat对象组成。垫子有一个名为bouts的WTBout对象的NSMutableArray。
我希望能够在较量中更新一个回合而仅剩下其他的回合。在这里,我找到了我需要分配布特的垫子。如果它没有被初始化,我将它初始化。然后,如果它是空的,我尝试添加一个newBout,并崩溃。
我不应该能够像这样更改NSMutableArray的元素吗?
// Locate the correct mat
WTMat* mat = [self getMatFromBoutKey:[updateData valueForKey:@"boutKey"]];
WTBout* newBout = [WTBout buildBoutFromDictionary:updateData];
// need to initialize bouts
if ([mat bouts] == nil) {
NSLog(@"Initializing bouts");
NSMutableArray* newBouts = [[NSMutableArray alloc] init ];
[mat setBouts:newBouts];
}
if ([[mat bouts] count]) {
// if bouts has bouts, then adjust the bout stack
NSLog(@"bouts is not empty");
} else {
// if bouts is empty, just add a bout
NSLog(@"Adding a newBout");
NSMutableArray* oldBouts = [mat bouts];
NSLog(@"oldbouts: %@", [oldBouts description]);
[oldBouts addObject:newBout]; // -[__NSArrayI addObject:]: unrecognized selector sent to instance 0x10dd15ee0
}
WTMat.h:
#import <Foundation/Foundation.h>
@interface WTMat : NSObject
{
NSString* matName;
NSString* boutKey;
NSString* multicastAddress;
NSMutableArray* bouts;
}
@property (strong, nonatomic) NSString* matName;
@property (strong, nonatomic) NSString* boutKey;
@property (strong, nonatomic) NSString* multicastAddress;
@property (copy, nonatomic) NSMutableArray* bouts;
@end
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2012-05-12 08:14:00.491 Wrestling Tools[12623:403] Initializing bouts
2012-05-12 08:14:00.492 Wrestling Tools[12623:403] Adding a newBout
2012-05-12 08:14:00.492 Wrestling Tools[12623:403] oldbouts: (
)
2012-05-12 08:14:00.492 Wrestling Tools[12623:403] -[__NSArrayI addObject:]: unrecognized selector sent to instance 0x10dd15ee0
2012-05-12 08:14:00.492 Wrestling Tools[12623:403] -[__NSArrayI addObject:]: unrecognized selector sent to instance 0x10dd15ee0
2012-05-12 08:14:00.494 Wrestling Tools[12623:403] (
0 CoreFoundation 0x00007fff96783fc6 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff92375d5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff968102ae -[NSObject doesNotRecognizeSelector:] + 190
3 CoreFoundation 0x00007fff96770e73 ___forwarding___ + 371
4 CoreFoundation 0x00007fff96770c88 _CF_forwarding_prep_0 + 232
5 Wrestling Tools 0x000000010dc49343 -[WTUpdater fullUpdate:] + 835
在调试器中键入'po 0x10dd15ee0'来查看哪个对象正在发送错误的选择器。 – fannheyward
我看到的问题是我将bouts属性设置为'copy',这给了我一个不可变的副本,它不知道方法addObject:我已经将它改回为强壮,就像我的其他属性一样,我不知道这会对我的应用程序造成什么样的破坏。我如何管理从其他类的多个实例访问的可变数组。这会是一场噩梦吗? – Adam