iphone - NSInternalInconsistencyException 原因 : '-[__NSCFArray replaceObjectAtIndex:withObject:]: mutating method sent to immutable object'

Question

你能帮我解决以下错误吗:

由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因:“-[__NSCFArray replaceObjectAtIndex:withObject:]: mutating method sent to immutable object”

array_Info = [[NSMutableArray alloc] init];
array_Info = [dict_Temp objectForKey:@"Children"];

NSMutableArray *temp = [[NSMutableArray alloc] initWithArray:self.array_Info];

            int ran, arrayIndexing = 0;
            while ([temp count] != 0)
            {
                ran = arc4random();
                if(ran < 0)
                    ran*=-1;
                ran = ran % [temp count];

                if([temp count] == 1)
                    ran = 0;

                NSLog(@"%d  %d",arrayIndexing,ran);

                [self.array_Info replaceObjectAtIndex:arrayIndexing withObject:[temp objectAtIndex:ran]];

                [temp removeObjectAtIndex:ran];
                arrayIndexing++;
            }

Answer 1

假设 array_Info是 self.array_Info 的支持变量属性，您应该将第二行更改为:

array_Info = [[dict_Temp objectForKey:@"Children"] mutableCopy];

这将为您提供 replaceObjectAtIndex:withObject: 所需的可变数组称呼。