is there a clear understanding of IQWidgets library - ios

Question

I am trying to build a gantt chart.
I found this library on https://github.com/evolvIQ/iqwidgets
I download it, I tried to understand how can I use it.
I have a class that bring the data(JSON) from a server. I am assigning these results as [NSDictionary].
I tried to use the IQGanttView.h file by adding it as a subview of my current view.
IQGanttView.h has a method called addRow:(id<IQCalendarDataSource>)row
The addRow method has an argument of IQCalendarDataSource which is why I created a class as an IQCalendarDataSource (Task object).
I change the IQCalendarDataSource class to have the same property of my task class.
After creating these tasks object, I have a for loop for all the array(tasks object) to add them through addRow:(id<IQCalendarDataSource>)row method to show up on the chart.
I ran the code and followed it but it's not showing me the tasks on the chart.
I don't know if i'm missing something?
Can someone check the library and tell me if i'm missing something?
=================
This is the code that I was trying.
#import "GanttChartViewController.h"
#import "ASRESTAPI.h"
#import "ASUserSingleton.h"
#import "TasksObj.h"
#import "IQGanttView.h"
// when the view load I want to show the user the loading view until the data is ready to show up on the chart by calling [self setupLoadingIndicator] method
//
- (void)viewDidLoad {
[super viewDidLoad];
tasksItems = [[NSArray alloc] init];
self.ganttView = [[IQGanttView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:self.ganttView];
[self setupLoadingIndicator];
// Do any additional setup after loading the
[self gettheTasksItems];
}
-(void)setupLoadingIndicator
{
loadingView = [[UIView alloc] initWithFrame:CGRectMake(75, 155, 170, 170)];
loadingView.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];
loadingView.clipsToBounds = YES;
loadingView.layer.cornerRadius = 10.0;
activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
activityView.frame = CGRectMake(65, 40, activityView.bounds.size.width, activityView.bounds.size.height);
[loadingView addSubview:activityView];
loadingLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 115, 130, 22)];
loadingLabel.backgroundColor = [UIColor clearColor];
loadingLabel.textColor = [UIColor whiteColor];
loadingLabel.adjustsFontSizeToFitWidth = YES;
loadingLabel.textAlignment = NSTextAlignmentCenter;
loadingLabel.text = #"Loading...";
[loadingView addSubview:loadingLabel];
[self.ganttView addSubview:loadingView];
[activityView startAnimating];
}
-(void)gettheTasksItems
{
NSString* username = [[ASUserSingleton sharedInstance]userName];
NSString* password = [[ASUserSingleton sharedInstance]password];
_tasks = nil;
[ASRESTAPI tasksListUsername:username andPassword:password completionBlock:^(NSDictionary *response, NSArray *taskArray) {
_tasks = response;
tasksItems = taskArray;
NSMutableArray *tasksObjs = [NSMutableArray array];
int i;
for (i =0; i < tasksItems.count;i++)
{
/*_tasks[#"project"][#"name"]*/ // this is how to call the dictionary object from the array
TasksObj* tasksObj = [[TasksObj alloc]initWithProjectName:tasksItems[i][#"project"][#"name"]
startDate:tasksItems[i][#"start_date"]
dueDate:tasksItems[i][#"due_date"]
estimatedhours:tasksItems[i][#"estimated_hours"]];
//tasksItems[i] objectForKey:#"project"];
[tasksObjs addObject:tasksObj];
}
dispatch_async(dispatch_get_main_queue(), ^{
[activityView stopAnimating];
for (loadingView in [self.ganttView subviews])
{
[loadingView removeFromSuperview];
}
//[loadingView removeFromSuperview];
for (TasksObj* tasksObj in tasksObjs) {
[self.ganttView addRow:tasksObj];
}
});
}];
}
The reason that I'm using dispatch_async(dispatch_get_main_queue() is to make sure that the UI element is shown, i've learned that if I want the UI element to be shown then I have to make it through the main queue.
This is the class of TasksObj
#interface TasksObj : NSObject <IQCalendarDataSource>
#property (nonatomic, strong) NSString* projectName;
#property (nonatomic, strong) NSDate* start_date;
#property (nonatomic, strong) NSDate* due_date;
#property (nonatomic, strong) NSNumber* estimated_hours;
-(id)initWithProjectName:(NSString*)projectName startDate:(NSDate*)start_date dueDate:(NSDate*)due_date estimatedhours:(NSNumber*)estimated_hours;
#end
#implementation TasksObj
-(id)initWithProjectName:(NSString*)projectName startDate:(NSDate*)start_date dueDate:(NSDate*)due_date estimatedhours:(NSNumber*)estimated_hours
{
self = [super init];
if (self) {
self.projectName = projectName;
self.start_date = start_date;
self.due_date = due_date;
self.estimated_hours = estimated_hours;
}
return self;
}
#end
by the way this is the JSON data that i'm getting from the server
"task":
{
"id":1,
"project":{"id":1,"name":"test"},
"tracker":{"id":1,"name":"Bug"},
"status":{"id":1,"name":"New"},
"priority":{"id":4,"name":"Urgent"},
"author":{"id":1,"name":"the user name"},
"subject":"Example",
"description":"",
"start_date":"2016-02-17",
"due_date":"2016-02-23",
"done_ratio":0,
"estimated_hours":3.0,
"spent_hours":0.0,
"created_on":"2016-02-18T04:28:55Z",
"updated_on":"2016-02-22T19:09:22Z"
}