Tasks

Tasks helper provides simple implement of tasks chain with async and sync.

Rapid request network asynchronously example

    [A_TaskHelper A_RunInBackground:^id{
        NSDictionary* _dic = [A_RESTRequest A_GetDictionary:@"www.yourwebservice.com/something"
            Parameters:@{@"key1":@"value", @"key2": @"value2"}
            Headers:@{@"Accept":@"application/json",
                @"Content-Type":@"application/json; charset=utf-8"}];
        return _dic;
    } WhenDone:^(id arg) {
        NSDictionary* _dic = (NSDictionary*)arg;
        // Displaying in UI Thread
    }];

Rapid asynchronously operation example

    [A_TaskHelper A_RunInBackgroundWithParam:@"Arguments"
        Block:^id(id arg) {
            return [arg stringByAppendingString:@" with result"];
        } WhenDone:^(id arg, id result) {
            NSLog(@"%@", result); // Arguments with result
        }];

Delay execute example

// Delay 1.3 seconds and pop-up an alert box
[A_TaskHelper A_DelayExecuteWithObj:@"Message here!" Method:^(id arg) {
    [A_AlertBox A_SystemAlert:(NSString*)arg AndTitle:@"Alert"];
} Delay:1.3f];

Tasks chain mutil-steps example

A_TaskHelper* task = [A_TaskHelper A_Init:A_Task_RunInBackgroup Sequential:YES];
    [task A_AddDelayTask:2.0f Block:^(A_TaskHelper *task) {
            NSLog(@"Task %d",1);
    }];
    [task A_AddDelayTask:1.0f Block:^(A_TaskHelper *task) {
            NSLog(@"Task %d",2);
    }];
    [task A_AddTask:^(A_TaskHelper *task) {
            NSLog(@"Task %d",3);
    }];

    CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();

    [task A_ExecuteWithCompletion:^(A_TaskHelper *task) {
        CFAbsoluteTime end = CFAbsoluteTimeGetCurrent();
        NSLog(@"operation took %2.5f seconds", end-start);
    }];
    /*
        The result shows tasks are running in order, because the queue is in Sequential Mode.

        Output:
            xctest[4323:138683] Task 1
            xctest[4323:138683] Task 2
            xctest[4323:138683] Task 3
            xctest[4323:138683] operation took 3.19355 seconds
    */

    /*
        If set the Sequential to NO, then the result will be difference.

        Output:
            xctest[4499:153364] Task 3
            xctest[4499:153363] Task 2
            xctest[4499:153370] Task 1
            xctest[4499:153363] operation took 2.09852 seconds
    */
        

Tasks chain example

    // By default, task is set as A_Task_RunInBackgroupCompleteInMain and Sequential
    [[[[A_TaskHelper A_Init] A_AddTask:^(A_TaskHelper *task) {
        task.Tag = @(1);
    }] A_AddTask:^(A_TaskHelper *task) {
        task.Tag = @([((NSNumber*)task.Tag) integerValue] + 1);
    }] A_ExecuteWithCompletion:^(A_TaskHelper *task) {
        NSLog(@"Tag: %@", task.Tag);
    }];