我有NSMutableArray *myArray
,这是使用TouchXML
正确.xml解析文件的结果。
我只想用密钥name
提取所有元素,然后将其存储在单独的NSMutableArray
中,但我的最终NSMutableArray *namesList
无法访问,立即崩溃我的iPhone应用程序,因为它只包含最后一个枚举字符串,而不是整个数组。
以下是代码:
NSMutableArray *namesList = [[NSMutableArray alloc] initWithArray:myArray copyItems:YES];
int i;
for (i = 0; i < [myArray count]; i++)
{
namesList = [[myArray objectAtIndex:i] objectForKey:@"name"];
NSLog(@"All Names: %@", namesList);
}
NSLog(@"First Name: %@", [namesList objectAtIndex:0]); <-- crashing line
这是NSLog:
-[__NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x6a42540
2012-04-04 10:34:07.882 Sections[3610:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x6a42540'
答案 0 :(得分:2)
[[myArray objectAtIndex:i] objectForKey:@"name"];
会返回NSString
个对象而不是其他数组,因此您无法向其发送objectAtIndex
。检查阵列的结构。
答案 1 :(得分:2)
你应该可以这样做:
NSMutableArray * namesList = [NSMutableArray alloc] init];
for(i = 0; i < [myArray count]; i++)
{
NSString * tempString = [NSString stringWithString:[[myArray objectAtIndex:i] objectForKey:@"name"]];
[namesList addobject:tempString];
}
NSLog(@"First Name: %@", [namesList objectAtIndex:0]);