\nreturn_type function_name(parameter list)\r\n{\r\n body of the function\r\n}<\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\nIn Objective-C, you can create a Objective-C class having NSObject superclass.<\/p>\n I am creating a CommonFunctions.h<\/strong> & CommonFunctions.m<\/strong>\u00a0as given below:<\/p>\nHeader File (CommonFunctions.h)<\/h2>\n\n\n\n\n#import <UIKit\/UIKit.h>\r\n\r\n#pragma mark - NSUserDefaults\r\n\r\nvoid saveDataWithKey(id data,NSString *key);\r\nid dataWithKey(NSString *key);\r\n\r\n#pragma mark - Notification\r\n\r\nvoid removeNotification(id sender);\r\nvoid postNotification(NSString *name, id object);\r\nvoid addNotification(NSString *name, id sender,SEL selector,id object);\r\n\r\n#pragma mark - NSFileManager\r\n\r\nBOOL isFileExist(NSString* path);\r\nvoid removePath(NSString* path);\r\nvoid createDirectory(NSString* path);\r\nBOOL isDirectoryExist(NSString* path);\r\n\r\n#pragma mark - String\r\n\r\n\/\/ function to check empty or null string\r\nBOOL nonEmptyString(NSString *string);\r\n\r\n#pragma mark - Custom\r\n\r\nvoid customBackButtonForController(id controller);\r\nvoid startShake (UIView* view);\r\nvoid shakeEnded (NSString * animationID, BOOL finished, void *context);\r\nvoid showAlert (NSString * title,NSString * message);\r\n\/\/Function to calculate height for label according to text at runtime\r\nCGSize dynamicHeightForLabel(NSString *text,float width, UIFont *font);\r\n<\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n Implementation File (CommonFunctions.m)<\/h2>\n \n\n\n\n#import \"CommonFunctions.h\"\r\n\r\n#pragma mark - NSUserDefaults\r\n\r\nvoid saveDataWithKey(id data,NSString *key){\r\n\r\n NSData *data_ = [NSKeyedArchiver archivedDataWithRootObject:data];\r\n [[NSUserDefaults standardUserDefaults] setObject:data_ forKey:key];\r\n [[NSUserDefaults standardUserDefaults] synchronize];\r\n}\r\n\r\nid dataWithKey(NSString *key){\r\n\r\n NSData *data = [[NSUserDefaults standardUserDefaults] objectForKey:key];\r\n if(!data)\r\n return nil;\r\n return [NSKeyedUnarchiver unarchiveObjectWithData:data];\r\n}\r\n\r\n#pragma mark - Notification\r\n\r\nvoid removeNotification(id sender){\r\n [[NSNotificationCenter defaultCenter] removeObserver:sender];\r\n}\r\nvoid postNotification(NSString *name, id object){\r\n [[NSNotificationCenter defaultCenter] postNotificationName:name object:object];\r\n}\r\nvoid addNotification(NSString *name, id sender,SEL selector,id object){\r\n [[NSNotificationCenter defaultCenter] addObserver:sender \r\n selector:selector \r\n name:name \r\n object:object];\r\n}\r\n\r\n#pragma mark - NSFileManager\r\n\r\nBOOL isFileExist(NSString* path){\r\n\r\n return [[NSFileManager defaultManager] fileExistsAtPath:path];\r\n}\r\n\r\nvoid removePath(NSString* path){\r\n\r\n [[NSFileManager defaultManager] removeItemAtPath:path error:nil];\r\n}\r\n\r\nvoid createDirectory(NSString* path){\r\n\r\n [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:NO attributes:nil error:nil];\r\n}\r\n\r\nBOOL isDirectoryExist(NSString* path){\r\n\r\n BOOL is = NO;\r\n if([[NSFileManager defaultManager] fileExistsAtPath:path isDirectory:&is])\r\n return YES;\r\n return NO;\r\n}\r\n\r\n#pragma mark- String\r\n\r\nBOOL nonEmptyString(NSString *string){\r\n if (string == (id)[NSNull null] || string.length == 0){\r\n return NO;\r\n }else{\r\n NSMutableString *inputString = [NSMutableString stringWithString:string];\r\n [inputString replaceOccurrencesOfString:@\" \" \r\n withString:@\"\" \r\n options:NSCaseInsensitiveSearch \r\n range:NSMakeRange(0, [string length])];\r\n \r\n if(inputString.length == 0)\r\n return NO;\r\n return YES;\r\n }\r\n\r\n} \r\n\r\n#pragma mark- Custom\r\n\r\nvoid startShake (UIView* view){\r\n\r\n CGAffineTransform leftShake = CGAffineTransformMakeTranslation(-5, 0);\r\n CGAffineTransform rightShake = CGAffineTransformMakeTranslation(0, 0);\r\n \r\n view.transform = leftShake; \/\/ starting point\r\n \r\n [UIView beginAnimations:@\"shake_button\" context:(__bridge void *)(view)];\r\n [UIView setAnimationRepeatAutoreverses:YES]; \/\/ important\r\n [UIView setAnimationRepeatCount:3];\r\n [UIView setAnimationDuration:0.06];\r\n \r\n shakeEnded(@\"shake_button\", YES, (__bridge void *)(view));\r\n view.transform = rightShake; \/\/ end here & auto-reverse\r\n [UIView commitAnimations];\r\n}\r\n\r\nvoid shakeEnded (NSString * animationID, BOOL finished, void *context){\r\n\r\n if (finished) {\r\n UIView* item = (__bridge UIView *)context;\r\n item.transform = CGAffineTransformIdentity;\r\n }\r\n}\r\n\r\nvoid showAlert (NSString * title,NSString * message){\r\n\r\n UIAlertView *alerView = [[UIAlertView alloc]initWithTitle:title \r\n message:message \r\n delegate:nil \r\n cancelButtonTitle:nil \r\n otherButtonTitles:@\"Ok\", nil];\r\n [alerView show];\r\n}\r\n\r\nvoid customBackButtonForController (UIViewController *controller){\r\n \r\n UIButton *customBackBtn = [UIButton buttonWithType:UIButtonTypeCustom];\r\n customBackBtn.frame = CGRectMake(0, 0, 22, 22);\r\n BUTTONIMAGE(customBackBtn, \"backArrow\");\r\n BUTTON_ADD_TARGET(customBackBtn,controller,backBtnAciton:);\r\n UIBarButtonItem *leftBarBtnItem = [[UIBarButtonItem alloc] initWithCustomView:customBackBtn];\r\n [controller.navigationItem setLeftBarButtonItem:leftBarBtnItem animated:YES];\r\n}\r\n\r\nCGSize dynamicHeightForLabel(NSString *text,float width, UIFont *font){\r\n \r\n CGSize constrainedSize = CGSizeMake(width, CGFLOAT_MAX);\r\n NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:font,\r\n NSFontAttributeName,nil];\r\n NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:text\r\n attributes:attributesDictionary];\r\n CGRect requiredHeight = [string boundingRectWithSize:constrainedSize\r\n options:NSStringDrawingUsesLineFragmentOrigin context:nil];\r\n \r\n if (requiredHeight.size.width > width) {\r\n requiredHeight = CGRectMake(0, 0, width, requiredHeight.size.height);\r\n }\r\n return requiredHeight.size;\r\n}\r\n\r\n<\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nHow to call CommonFunctions.h methods<\/h2>\nSimple like other Objective-C class import “CommonFunctions.h” class in required controller or views and access methods by calling method name directly.<\/p>\n Example:<\/p>\n \n\n\n\n#import \"CommonFunctions.h\"\r\n\r\nNSString *string = @\"string\";\r\n\r\nif(notEmptyString(string)){\r\n NSLog(@\"string is not empty\");\r\n}else{\r\n NSLog(@\"string is empty or null\");\r\n}\r\n<\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n Download<\/h2>\nYou can download the CommonFunctions.h & CommonFunctions.m from\u00a0here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Introduction Like C, I would like to use C functions in \u00a0Objective-C class so i could\u00a0use C functions anywhere anytime without using class name. Defining function: Function definition in C programming language is as follows \u2212 return_type function_name(parameter list) { body of the function } In Objective-C, you can create a Objective-C class having NSObject […]<\/p>\n","protected":false},"author":169,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":26},"categories":[1400,1],"tags":[4848,2782,2783],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/24503"}],"collection":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/users\/169"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/comments?post=24503"}],"version-history":[{"count":0,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/24503\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/media?parent=24503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/categories?post=24503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/tags?post=24503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} | | | |