address doesn't contain a section that points to a section in a object file

Question

int (*MobileInstallationBrowse)(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value);static int callback(NSDictionary *dict, id result)
{
    NSArray *currentlist = [dict objectForKey:@"CurrentList"];
    if (currentlist)
    {
        for (NSDictionary *appinfo in currentlist)
        {
            [(NSMutableArray*)result addObject:[appinfo copy]];
        }
    }
    return 0;
}
-(IBAction)btnGetApp:(UIButton *)sender
{
   
    NSMutableArray *result = [NSMutableArray new];
    MobileInstallationBrowse([NSDictionary dictionaryWithObject:@"Any" forKey:@"ApplicationType"],&callback, result);  //Any 代表所有程序，这里可以用 “System” “User”来区分系统和普通软件
}
为什么运行红色那行代码时提示：
error: address doesn't contain a section that points to a section in a object file

Answer 1

因为那个MobileInstallationBrowse只是一个函数指针，不能直接用，要指向一个实现了的函数
加上实现就OK了 
int (*MobileInstallationBrowse)(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value);int MobileInstallationBrowseImplementation(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value)
{
    NSLog(@"MobileInstallationBrowseImplementation");
    return 0;
}static int callback(NSDictionary *dict, id result)
{
    NSArray *currentlist = [dict objectForKey:@"CurrentList"];
    if (currentlist)
    {
        for (NSDictionary *appinfo in currentlist)
        {
            [(NSMutableArray*)result addObject:[appinfo copy]];
        }
    }
    return 0;
}-(void)btnGetApp
{
    NSMutableArray *result = [NSMutableArray new];
    MobileInstallationBrowse = MobileInstallationBrowseImplementation;
    
    MobileInstallationBrowse([NSDictionary dictionaryWithObject:@"Any" forKey:@"ApplicationType"], callback, result);  //Any 代表所有程序，这里可以用 “System” “User”来区分系统和普通软件
}

Answer 2

int (*MobileInstallationBrowse)(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value);
 
<span style="color: #FF0000;">int MobileInstallationBrowseImplementation(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value)
{
    NSLog(@"MobileInstallationBrowseImplementation");
    return 0;
}</span>
 
static int callback(NSDictionary *dict, id result)
{
    NSArray *currentlist = [dict objectForKey:@"CurrentList"];
    if (currentlist)
    {
        for (NSDictionary *appinfo in currentlist)
        {
            [(NSMutableArray*)result addObject:[appinfo copy]];
        }
    }
    return 0;
}
 
-(void)btnGetApp
{
    NSMutableArray *result = [NSMutableArray new];
    MobileInstallationBrowse = MobileInstallationBrowseImplementation;
     
    MobileInstallationBrowse([NSDictionary dictionaryWithObject:@"Any" forKey:@"ApplicationType"], callback, result);  //Any 代表所有程序，这里可以用 “System” “User”来区分系统和普通软件
}

Answer 3

晕，发错了，看红色那块代码int (*MobileInstallationBrowse)(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value);
 
int MobileInstallationBrowseImplementation(NSDictionary *options, int (*callback)(NSDictionary *dict, id value), id value)
{
    NSLog(@"MobileInstallationBrowseImplementation");
    return 0;
}
 
static int callback(NSDictionary *dict, id result)
{
    NSArray *currentlist = [dict objectForKey:@"CurrentList"];
    if (currentlist)
    {
        for (NSDictionary *appinfo in currentlist)
        {
            [(NSMutableArray*)result addObject:[appinfo copy]];
        }
    }
    return 0;
}
 
-(void)btnGetApp
{
    NSMutableArray *result = [NSMutableArray new];
    MobileInstallationBrowse = MobileInstallationBrowseImplementation;
     
    MobileInstallationBrowse([NSDictionary dictionaryWithObject:@"Any" forKey:@"ApplicationType"], callback, result);  //Any 代表所有程序，这里可以用 “System” “User”来区分系统和普通软件
}