Iphone 与PC相比，移动设备中显示的引脚数量有限

我正在加载地图视图。我根据通讯录中联系人的地址在地图上添加PIN。我遇到了一些奇怪的情况，其中一些引脚（可能是10个引脚中的2个）没有在地图视图中出现。我查过地址了，地址是有效的。但大头针没有掉下来。这可能是什么原因呢

    for (i = 0; i<[groupContentArray count]; i++) {
        person = ABAddressBookGetPersonWithRecordID(addressbook,[[groupContentArray objectAtIndex:i] intValue]);
        ABMultiValueRef addressProperty = ABRecordCopyValue(person, kABPersonAddressProperty);
        NSArray *address = (NSArray *)ABMultiValueCopyArrayOfAllValues(addressProperty);
        NSLog(@"Address %@", address);
        for (NSDictionary *addressDict in address) 
        {
            addAnnotation = nil;
            firstName = (NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty); 
            lastName = (NSString *)ABRecordCopyValue(person, kABPersonLastNameProperty); 

            NSString *country = [addressDict objectForKey:@"Country"];
            NSString *streetName = [addressDict objectForKey:@"Street"];
            NSString *cityName = [addressDict objectForKey:@"City"];
            NSString *stateName = [addressDict objectForKey:@"State"];

            if (streetName == (id)[NSNull null] || streetName.length == 0 ) streetName = @"";
            if (stateName == (id)[NSNull null] || stateName.length == 0 ) stateName = @"";
            if (cityName == (id)[NSNull null] || cityName.length == 0 ) cityName = @"";
            if (country == (id)[NSNull null] || country.length == 0 ) country = @"";


            NSString *fullAddress = [streetName stringByAppendingFormat:@"%@/%@/%@", cityName, stateName, country];
            mapCenter = [self getLocationFromAddressString:fullAddress];
            if(stateName != NULL || country != NULL || streetName != NULL || cityName != NULL){

                if ((mapCenter.latitude == 0) && (mapCenter.longitude == 0))
                {
                    // Alert View
                }
                else{
                addAnnotation = (MyAddressAnnotation *)[mapView dequeueReusableAnnotationViewWithIdentifier:[groupContentArray objectAtIndex:i]];

                if(addAnnotation == nil){
                    addAnnotation = [[[MyAddressAnnotation alloc] initWithCoordinate:mapCenter title:firstName SubTitle:lastName Recordid:[groupContentArray objectAtIndex:i] ]autorelease];

                    [mapView addAnnotation:addAnnotation];}
                                    }
            }
        }
        CFRelease(addressProperty);

    }

对于（i=0；i此代码：

else {
    addAnnotation = (MyAddressAnnotation *)[mapView dequeueReusableAnnotationViewWithIdentifier:[groupContentArray objectAtIndex:i]];

    if (addAnnotation == nil) {
        addAnnotation = [[[MyAddressAnnotation alloc] initWithCoordinate:mapCenter title:firstName SubTitle:lastName Recordid:[groupContentArray objectAtIndex:i] ]autorelease];

        [mapView addAnnotation:addAnnotation];
    }
}

毫无意义



dequeueReusableAnnotationViewWithIdentifier
方法用于将
MKAnnotationView
对象（而不是
id
对象）排挤出队列

出列代码属于
viewForAnnotation
delegate方法，但不属于此处

在这里，您只需创建注释对象（
MyAddressAnnotation
）并对其调用
addAnnotation
）

我还强烈建议您将注释变量的名称从
addAnnotation
更改为其他名称，这样您就不会将其与地图视图的方法
addAnnotation
My bad混淆。在我使用的“fulladdress”字符串（streetName和cityName之间）中，没有用空格或“、”或“/”分隔。因此，一些地址没有被识别。
你能展示一些编码吗？如果没有任何编码，我很确定不可能说出错误所在。换句话说：请提供更多信息，如编码。完全同意哈德利的观点……请提供你编码的内容……我能为你做些什么吗e地图加载速度更快。现在加载速度太慢。