nsmutablearray

I have a NSMutableArray that is loaded with values. Later in the application, I need to change the values of one of the elements in the array. How do I accomplish this? thanks tony Take a look at the class reference instance methods: http://developer.apple.com/library/ios/#documentation/cocoa/reference/foundation/Classes/NSMutableArray_Class/Reference/Reference.html You can use: replaceObjectAtIndex:withObject: given you know the index of the object. replaceObjectsAtIndexes:withObjects: to replace multiple objects at once. Call -[NSMutableArray replaceObjectAtIndex:withObject:] . Or, if the

Is it possible to use fast enumeration with an NSArray that contains an NSDictionary? I'm running through some Objective C tutorials, and the following code kicks the console into GDB mode NSMutableArray *myObjects = [NSMutableArray array]; NSArray *theObjects = [NSArray arrayWithObjects:@"easy as 1",@"easy as two", @"Easy as Three"]; NSArray *theKeys = [NSArray arrayWithObjects:@"A",@"B",@"C"]; NSDictionary *theDict = [NSDictionary dictionaryWithObjects:theObjects forKeys:theKeys]; [myObjects addObject:theDict]; for(id item in myObjects) { NSLog(@"Found an Item: %@",item); } If I replace the

I am trying to convert (or copy?) a NSMutableArray into a NSString . I guess my problem is that I don't really understand the structure of a NSString . After conversion I want to attached it in email body. Here is my code: - (IBAction)sendEmail { NSLog(@"sendEmail"); [textView resignFirstResponder]; [textView1 resignFirstResponder]; if ([MFMailComposeViewController canSendMail]) { // set the sendTo address NSMutableArray *recipients = [[NSMutableArray alloc] initWithCapacity:1]; [recipients addObject:@"example@yahoo.com"]; MFMailComposeViewController *controller = [[MFMailComposeViewController

Basic question. What is the best way to selectively remove and delete items from a mutable Array in Swift? There are options that do NOT seem to be suited for this like calling removeObject inside a for in loop enumeration block and others that appear to work in general like for loop using an index + calling removeObjectAtIndex , even inside the loop for in loop for populating an arrayWithItemsToRemove and then use originalArray. removeObjectsInArray(arrayWithItemsToRemove) using .filter to create a new array seems to be really nice, but I am not quite sure how I feel about replacing the whole

This is in my .m - (void)viewDidLoad { [super viewDidLoad]; [self.scrollView addSubview:self.contentView]; self.scrollView.contentSize = self.contentView.bounds.size; NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; NSMutableArray *arr = [[NSMutableArray alloc]init]; arr = [Singleton getArray]; NSString *str = [arr componentsJoinedByString:@"\n"]; summaryLabel.text = str; } This is in my .h @interface TotalViewController : UIViewController { UIScrollView *scrollView; UIView *contentView; } @property (nonatomic, retain) IBOutlet UIScrollView * scrollView; @property

Is the parameter for NSKeyedArchiver archivedDataWithRootObject: supposed to be the array I am trying to save, or the array converted into NSData? To convert a generic array to an NSData , you need an archiver! If you know how to feed the NSData , you know how to use NSKeyedArchiver . So: NSArray* array= ... ; NSData* data=[NSKeyedArchiver archivedDataWithRootObject:array]; Of course all elements in your array needs to implement encodeWithCoder: . Bruce Lee Yuji's answer is right. but more accurately, your element of an array have to implement protocol and fillin your own code to methods

this is my data strucure: group [1...n] { id, name, elements : [1...n] } I define a class for element with all properties and a class for group as: @interface Group : NSObject { NSInteger groupID; NSString *groupName; NSMutableArray *elements; } @property (assign, readwrite) NSInteger groupID; @property (assign, readwrite) NSString *groupName; @property (assign, readwrite) NSMutableArray *elements; and single element with: @interface Element : NSObject { NSInteger elementID; NSString *elementName; } @property (assign, readwrite) NSInteger elementID; @property (assign, readwrite) NSString

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center . Closed 7 years ago . Is there any why to remove last object in NSMutablearray without crashing app? :D Sure: send the removeLastObject message to a valid NSMutableArray object which is not empty. 来源： https://stackoverflow.com/questions/13498707/removing-last-object-in