Error in this code happen inside Infaragistics Framework -[IGGridViewColumnDefinition resolveValueForObject:inDataSource:] + 112. I'm creating an NSObject in runtime and setting the datasource value to the retuned NSArray of getArrayOfRecrodsFrom function. If I commented the lines indicated in the function the code runs fine with no issues but w…

details.json

{
    "replyCode": "0",
    "replyMessage": "Succcess",
    "responseDetails": [
        {
            "unrealizedGainLossPercentage": "15.23",
            "marketValueProductCurrency": "131223845.03",
            "marketValueSAR": "131223845.03",
            "unrealizedGainLoss": "3170616.28",
            "totalCost": "128053228.75",
            "marketName": "Saudi Market",
            "allocationPercentage": "40.96",
            "currency": "SAR"
        },
        {
            "unrealizedGainLossPercentage": "6.23",
            "marketValueProductCurrency": "27888382.02",
            "marketValueSAR": "104581301.86",
            "unrealizedGainLoss": "1288382.02",
            "totalCost": "26600000",
            "marketName": "Dubai Financial Market",
            "allocationPercentage": "32.66",
            "currency": "SAR"
        },
        {
            "unrealizedGainLossPercentage": "35.01",
            "marketValueProductCurrency": "76165664.43",
            "marketValueSAR": "76165664.43",
            "unrealizedGainLoss": "1165664.43",
            "totalCost": "75000000",
            "marketName": "Kuwait",
            "allocationPercentage": "23.78",
            "currency": "SAR"
        }
    ]
}

fields.json

{
    "replyCode": "0",
    "replyMessage": "Succcess",
    "responseDetails": [
        {
            "order": "1",
            "fieldType": "TEXT",
            "columnName": "Market Name",
            "fieldName": "marketName"
        },
        {
            "order": "2",
            "fieldType": "TEXT",
            "columnName": "Currency",
            "fieldName": "currency"
        },
        {
            "order": "3",
            "fieldType": "PRICE",
            "columnName": "Total Cost",
            "fieldName": "totalCost"
        },
        {
            "order": "4",
            "fieldType": "PRICE",
            "columnName": "Market Value Product Currency",
            "fieldName": "marketValueProductCurrency"
        },
        {
            "order": "5",
            "fieldType": "PRICE",
            "columnName": "Market Value SAR",
            "fieldName": "marketValueSAR"
        },
        {
            "order": "6",
            "fieldType": "PRICE",
            "columnName": "Unrealized Gain/Loss Value",
            "fieldName": "unrealizedGainLoss"
        },
        {
            "order": "7",
            "fieldType": "PRICE",
            "columnName": "Unrealized Gain/Loss Value %",
            "fieldName": "unrealizedGainLossPercentage"
        },
        {
            "order": "8",
            "fieldType": "PRICE",
            "columnName": "Allocation %",
            "fieldName": "allocationPercentage"
        }
    ]
}

Functions.c

@implementation MainWidgetViewController

- (NSArray *)getArrayOfRecrodsFrom: (NSArray *)response {
    NSMutableArray * rows = [[NSMutableArray alloc] init];
    if ([response count] != 0) {
        // 1. get all NSDictionary keys
        NSDictionary * temp = response[0];
        NSArray * keys = [temp allKeys];
        
        if (!NSClassFromString(self.ServiceName)) {
            // 2. create a class
            self.ModelClass = objc_allocateClassPair([NSObject class], [self.ServiceName UTF8String], 0);
            
            // 3. all class variables with the same name as key retrieved from NSDictionary
            for (NSString * key in keys) {
                const char * name = [key UTF8String];
                class_addIvar(self.ModelClass, name, sizeof(id), rint(log2(sizeof(id))), @encode(id));
                objc_property_attribute_t type = {"T", "@\"NSString\""}; // type
                objc_property_attribute_t ownership1 = {"&", "" }; // stong
                objc_property_attribute_t ownership2 = {"N", "" }; //
                objc_property_attribute_t backingivar = {"V", name}; // name
                objc_property_attribute_t attrs[] = {type, ownership1, ownership2, backingivar};
                unsigned int attrCount = sizeof(attrs)/sizeof(attrs[0]);
                class_addProperty(self.ModelClass, name, attrs, attrCount);
            }
            
            // 4. register a class to be used
            @try {
                objc_registerClassPair(self.ModelClass);
            } @catch (NSException * e) {
                NSLog(@"Exception in class registeration: %@", e);
            }
        } else {
            self.ModelClass = NSClassFromString(self.ServiceName);
        }
        
        for (NSDictionary * curr in response) {
            // create object
            id MC = [[self.ModelClass alloc] init];
            for (int i = 0, size = (int)[keys count]; i < size; i++) {
                
                NSString * newValue = [[NSString alloc] init];
                NSString * type = [self getColumnType: keys[i]];
                // If commented the following 5 lines
                if ([type isEqualToString:@"PRICE"]) {
                    newValue = [NSString stringWithFormat:@"%.02f", [[curr objectForKey: keys[i]] doubleValue]];
                } else {
                    newValue = [curr objectForKey: keys[i]];
                }
                // until here comment
                // set values for Ivar
                const char * name = [keys[i] UTF8String];
                Ivar CurrVar = class_getInstanceVariable(self.ModelClass, name);
                
                object_setIvar(MC, CurrVar, [newValue copy]);
            }
            // add object to array
            [rows addObject:MC];
        }
    }
    return rows;
}

- (NSString *)getColumnType:(NSString *)colName {
    for (TableColumn * col in self.TableColumns) {
        if ([colName isEqualToString:col.fieldName]) {
            return col.fieldType;
        }
    }
    return @"TEXT";
}

@end