Remind review in iPhone apps

Introduction

In iPhone apps, we often need to remind the user to review/rate the app in iTunes. This sample code will demo a simple solution.

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface CloudReview : NSObject {
    int m_appleID;
}
+(CloudReview*)sharedReview;
-(void) reviewFor:(int)appleID;
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex;
@end

#import "CloudReview.h"

@implementation CloudReview
static CloudReview* _sharedReview = nil;
+(CloudReview*)sharedReview
{
    @synchronized([CloudReview class])
    {
        if (!_sharedReview)
            [[self alloc] init];
        
        return _sharedReview;
    }
    
    return nil;
}
+(id)alloc
{
    @synchronized([CloudReview class])
    {
        NSAssert(_sharedReview == nil, 
            @"Attempted to allocate a second instance of a singleton.");
        _sharedReview = [super alloc];
        return _sharedReview;
    }
    
    return nil;
}
-(void)reviewFor:(int)appleID
{
    m_appleID = appleID;
    BOOL neverRate = [[NSUserDefaults standardUserDefaults] boolForKey:@"neverRate"];
    if(neverRate != YES) {
        //Show alert here
        UIAlertView *alert;
        alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"rate_title",@"Rate My Appication")
                     message:NSLocalizedString(@"rate_main",@"Please Rate my Application")
                     delegate: self
                     cancelButtonTitle:NSLocalizedString(@"rate_cancel",@"Cancel")
                     otherButtonTitles: NSLocalizedString(@"rate_now",@"Rate Now"),
                 NSLocalizedString(@"rate_never",@"Never Rate"), nil];
        [alert show];
        [alert release];
    }
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    // Never Review Button
    if (buttonIndex == 2)
    {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"neverRate"];
    }
    // Review Button
    else if (buttonIndex == 1)
    {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"neverRate"];
        NSString *str = [NSString stringWithFormat:
                @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore" + 
                @".woa/wa/viewContentsUserReviews?type=Purple+Software&id=%d",
                m_appleID ]; 
        NSLog(str);
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];
    }
}
@end 

CloudReview was declared in my library, I always use it in my app. The solution pops a UIAlertView to remind the user and it will save the result in NSUserDefaults.

How to use

[[CloudReview sharedReview]reviewFor:395519376];

Just use this code. Maybe you will ask me, how do we get an AppleID?

• http://itunes.apple.com/us/app/ninja-darts/id428839866?ls=1&mt=8[^]

In this link, we can see the number 428839866, which is the Apple ID. Or we can get it from iTunes Connect.