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POMaking code as modular as possible with private methods
 

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  1. POMaking code as modular as possible with private methods
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    <p>In my <code>-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath</code> method I have this code to return youtube video date for cell label: </p> <pre><code> //Video upload date NSString *formattedString = [[[self.videos objectAtIndex:indexPath.row] objectForKey:@"uploaded"] stringByReplacingOccurrencesOfString:@"T" withString:@""]; formattedString = [formattedString stringByReplacingCharactersInRange:NSMakeRange(18, 5) withString:@""]; NSDateFormatter *df = [[NSDateFormatter alloc] init]; [df setDateFormat:@"yyyy-MM-ddHH:mm:ss"]; NSDate *date = [df dateFromString:formattedString]; [df setDateFormat:@"dd/MM/yyyy"]; NSString *dateStr = [df stringFromDate:date]; cell.date.text = dateStr; </code></pre> <p>My method implementation looks bit messy and I am wondering what is correct approach. Should I keep this code where it is or I should make another private method for the date formatting?</p> <p>Let say I want to make private method. Something like: </p> <pre><code> -(NSString *)formatDateWithString:(NSString *) mystring { NSString *formattedString = [mystring stringByReplacingOccurrencesOfString:@"T" withString:@""]; formattedString = [formattedString stringByReplacingCharactersInRange:NSMakeRange(18, 5) withString:@""]; NSDateFormatter *df = [[NSDateFormatter alloc] init]; [df setDateFormat:@"yyyy-MM-ddHH:mm:ss"]; NSDate *date = [df dateFromString:formattedString]; [df setDateFormat:@"dd/MM/yyyy"]; NSString *dateStr = [df stringFromDate:date]; return dateStr; } </code></pre> <p>What should I than write in <code>-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath</code> method? </p> <p>My argument for my private method will be <code>[self.videos objectAtIndex:indexPath.row]</code> but I've lost how do I call this method and on which instance variable? </p> <p>I need to create an <code>NSString</code> instance variable in my view class or I can just initiate NSString instance in the <code>-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath</code> method and execute my private method on it?</p>
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    1. COGeneral rule of thumb, is if you intend to reuse logic, then place it into a reusable object. The idea is prevent duplication. In your case, create a `DateUtils` class and place your logic in there. Creating a category would be another option.
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    2. COPossible duplicate of : http://stackoverflow.com/questions/172598/best-way-to-define-private-methods-for-a-class-in-objective-c
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