當我嘗試將對象添加到NSMutableArray時,我得到「 - [__ NSArrayI addObject:]:發送到實例0x10dd15ee0的無法識別的選擇器」。我不知道爲什麼。添加對象到NSMutableArray屬性崩潰與無法識別的選擇器?
我有一組嵌套的自定義類。 WTEvent有一個名爲mats的NSMutableArray屬性,它由WTMat對象組成。墊子有一個名爲bouts的WTBout對象的NSMutableArray。
我希望能夠在較量中更新一個回合而僅剩下其他的回合。在這裏,我找到了我需要分配布特的墊子。如果它沒有被初始化,我將它初始化。然後,如果它是空的,我嘗試添加一個newBout,並崩潰。
我不應該能夠像這樣更改NSMutableArray的元素嗎?
// 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
登錄:
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
在調試器中鍵入'po 0x10dd15ee0'來查看哪個對象正在發送錯誤的選擇器。 – fannheyward
我看到的問題是我將bouts屬性設置爲'copy',這給了我一個不可變的副本,它不知道方法addObject:我已經將它改回爲強壯,就像我的其他屬性一樣,我不知道這會對我的應用程序造成什麼樣的破壞。我如何管理從其他類的多個實例訪問的可變數組。這會是一場噩夢嗎? – Adam