ios - NSArray : 'NSInvalidArgumentException' 上无法识别的选择器

Question

我已经坐了一个小时了，因为一些奇怪的异常。 我尝试调用一些方法:

for (int i = 0; i < [[DBElements objectAtIndex:index] count]; i++) {
            NSLog(@"selected Element: %@", [[DBElements objectAtIndex:index] objectAtIndex:i]);
            [self addElementsToView:dash withString:[[DBElements objectAtIndex:index] objectAtIndex:i] index:index andSubindex:i];
        }

该方法属于以下类型:- (void) addElementsToView: (UIView *) dash withString: (NSString *) type index:(NSInteger)index andSubindex : (int) i {}

NSLog 显示:

selected Element: NUMBER so the index stuff is ok. Why I get on the next step the following exception:

[__NSArrayI intValue]: unrecognized selector sent to instance 0x14d44f70 * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI intValue]: unrecognized selector sent to instance 0x14d44f70'

更新:DBElements 是:

( ( NUMBER, LABEL ), LABEL )

索引为0 i 是 0。所以它显示为 NSString 类型的 NUMBERS。

Answer 1

尝试转换

withString:[[DBElements objectAtIndex:index] objectAtIndex:i]

像这样:

withString:(NSString *)[[DBElements objectAtIndex:index] objectAtIndex:i]

希望对您有所帮助!