Some useful iOS development macros

Constants.h

#ifndef Constants_h
#define Constants_h

#pragma mark some useful macros

#define DEFAULTS                        [NSUserDefaults standardUserDefaults]
#define DEFAULTS_SET(key, value)        [[NSUserDefaults standardUserDefaults] setObject:value forKey:key]; [[NSUserDefaults standardUserDefaults] synchronize];

#define INSTANTIATE(viewController)     [[UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil] instantiateViewControllerWithIdentifier:viewController];
#define INSTANTIATE_VIEW(name)          [[[NSBundle mainBundle] loadNibNamed:name owner:self options:nil] objectAtIndex:0];

#define NETWORK_ON                      [UIApplication sharedApplication].networkActivityIndicatorVisible = YES
#define NETWORK_OFF                     [UIApplication sharedApplication].networkActivityIndicatorVisible = NO

#define IS_LANDSCAPE                    ([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationLandscapeLeft || [[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationLandscapeRight || UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation))

#define SCREEN_HEIGHT                   (IS_LANDSCAPE ? [[UIScreen mainScreen] bounds].size.width : [[UIScreen mainScreen] bounds].size.height)
#define SCREEN_WIDTH                    (IS_LANDSCAPE ? [[UIScreen mainScreen] bounds].size.height : [[UIScreen mainScreen] bounds].size.width)
#define STATUS_BAR_HEIGHT               20

#define TRACKER                         [[GAI sharedInstance] defaultTracker]

#define DEGREES_TO_RADIANS(angle)       ((angle) / 180.0 * M_PI)
#define RADIANS_TO_DEGREES(radians)     ((radians) * (180.0 / M_PI))

#define MUST_OVERRIDE                   [NSException raise:NSInternalInconsistencyException format:@"You must override %@ in a subclass", NSStringFromSelector(_cmd)]

#define FILE_NAME                       (strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__)

#define FRAME_STR(frame)                [NSString stringWithFormat:@"(%.0f, %.0f; %.0f %.0f)", frame.origin.x, frame.origin.y, frame.size.width, frame.size.height]

#define DEBUG_STRING(str)               [NSString stringWithFormat:@"%s %d %s\n%@", __FILE__, __LINE__, __PRETTY_FUNCTION__, str]

#define IPAD                            UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad

#endif

extern int ddLogLevel;

Constants.m

#import "Constants.h"

#ifdef DEBUG
    int ddLogLevel = LOG_LEVEL_VERBOSE;
#else
    int ddLogLevel = LOG_LEVEL_WARN;
#endif