Progressive track of new developers iterating NSArray in Obj-C.

AppDelegate.m

//
//  AppDelegate.m
//  testApplication
//
//  Created by Robert Haworth on 6/6/14.
//  Copyright (c) 2014 Robert Haworth. All rights reserved.
//

#import "AppDelegate.h"

@interface AppDelegate ()
            

@end

@implementation AppDelegate
            

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    NSArray *scenes = @[@"Act 1 Scene 1: Verona, A public place",
                       @"Act 1 Scene 2: Capulet's mansion",
                       @"Act 1 Scene 3: A room in Capulet's mansion",
                       @"Act 1 Scene 4: A street outside Capulet's mansion",
                       @"Act 1 Scene 5: The Great Hall in Capulet's mansion",
                       @"Act 2 Scene 1: Outside Capulet's mansion",
                       @"Act 2 Scene 2: Capulet's orchard",
                       @"Act 2 Scene 3: Outside Frair Lawrence's cell",
                       @"Act 2 Scene 4: A street in Verona",
                       @"Act 2 Scene 5: Capulet's mansion",
                       @"Act 2 Scene 6: Frair Lawrence's cell"];
    
    
    //Level-0
    //
    int indexTest = 0;
    for (int i = 0; i < 11; i++) {
        if ([scenes[i] hasPrefix:@"Act 1"]) {
            indexTest++;
        }
    }
    NSLog(@"Act 1 has %i scenes", indexTest);
    //
    //
    
    [self levelOne:scenes];
    [self levelTwo:scenes];
    [self levelThree:scenes];
    [self levelFour:scenes];

    return YES;
}

-(void)levelOne:(NSArray *)array
{
    int indexTest = 0;
    for (int i = 0; i < 11; i++) {
        if ([array[i] hasPrefix:@"Act 1"]) {
            indexTest++;
        }
    }
    NSLog(@"Act 1 has %i scenes", indexTest);
}

- (void)levelTwo:(NSArray *)scenes
{
    int indexTest = 0;
    for (int integer = 0; integer < [scenes count]; integer++) {
        if ([scenes[integer] hasPrefix:@"Act 1"]) {
            indexTest++;
        }
    }
    NSLog(@"Act 1 has %i scenes", indexTest);
}

- (void)levelThree:(NSArray *)scenes
{
    int actOneCount = 0;
    for (NSString *scene in scenes) {
        if ([scene hasPrefix:@"Act 1"]) {
            actOneCount++;
        }
    }
    NSLog(@"Act 1 has %i scenes", actOneCount);
}

- (void)levelFour:(NSArray *)scenes
{
    __block int actTwoCount = 0;
    [scenes enumerateObjectsUsingBlock:^(NSString *scene, NSUInteger idx, BOOL *stop) {
        if ([scene hasPrefix:@"Act 2"]) {
            actTwoCount++;
        }
    }];
    
    NSLog(@"while Act 2 has: %i scenes.", actTwoCount);
}


@end