Add Google Analytics into XCode project for iOS, resolving "use of '@import' when modules are disabled” error

APAnalyticsTracker.h

//
//  APAnalyticsTracker.h

#import <Foundation/Foundation.h>

@interface APAnalyticsTracker : NSObject

+ (void)configureTracker;
+ (void)trackScreenWithName: (NSString*) name;

+ (void)trackEventWithCategory: (NSString*) category
                        action: (NSString*) action
                         label: (NSString*) label;

+ (void)trackEventWithCategory: (NSString*) category
                        action: (NSString*) action
                         label: (NSString*) label
                         value: (NSNumber*) value;

@end

APAnalyticsTracker.m

//
//  GBAAnalyticsTracker.m

#import "APAnalyticsTracker.h"

#import "Google/Analytics.h"

@implementation APAnalyticsTracker

+ (void)configureTracker
{
    // Configure tracker from GoogleService-Info.plist.
    NSError *configureError;
    [[GGLContext sharedInstance] configureWithError:&configureError];
    NSAssert(!configureError, @"Error configuring Google services: %@", configureError);
    
    // Optional: configure GAI options.
    GAI *gai = [GAI sharedInstance];
    gai.trackUncaughtExceptions = YES;  // report uncaught exceptions
#if !(RELEASE)
    gai.logger.logLevel = kGAILogLevelVerbose;  // remove before app release
#endif
}

+ (void)trackScreenWithName: (NSString*) name
{
    id<GAITracker> tracker = [[GAI sharedInstance] defaultTracker];
    [tracker set:kGAIScreenName value:name];
    [tracker send:[[GAIDictionaryBuilder createScreenView] build]];
}

+ (void)trackEventWithCategory: (NSString*) category
                        action: (NSString*) action
                         label: (NSString*) label
{
    [self.class trackEventWithCategory:category action:action label:label value:@1];
}

+ (void)trackEventWithCategory: (NSString*) category
                         action: (NSString*) action
                          label: (NSString*) label
                          value: (NSNumber*) value
{
    id<GAITracker> tracker = [[GAI sharedInstance] defaultTracker];
    [tracker send:[[GAIDictionaryBuilder createEventWithCategory:category
                                                          action:action
                                                           label:label
                                                           value:value] build]];

}
@end

UsageExample.mm

//
// In your AppDelegate.mm
#import "APAnalyticsTracker.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[APAnalyticsTracker configureTracker];
// ...
}

//
// In every View Controller you'd like to track
#import "APAnalyticsTracker.h"

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    [APAnalyticsTracker trackScreenWithName:@"This screen name"];
// ...
}

//
// Wherever you're going to track some events
#import "APAnalyticsTracker.h"

- (void)userBought10Whiskey
{
// ...
    [APAnalyticsTracker trackEventWithCategory:@"User events"
                                        action:@"Purchased 10 wiskey"
                                         label:@"10 wiskey has been purchased"
                                         value:@10];
// ...
}