nsmutablearray

I'm able to put the contents of an NSSet into an NSMutableArray like this: NSMutableArray *array = [set allObjects]; The compiler complains though because [set allObjects] returns an NSArray not an NSMutableArray . How should this be fixed? Since -allObjects returns an array, you can create a mutable version with: NSMutableArray *array = [NSMutableArray arrayWithArray:[set allObjects]]; Or, alternatively, if you want to handle the object ownership: NSMutableArray *array = [[set allObjects] mutableCopy]; I resolved crashing by using NSMutableArray's method 'addObjectsFromArray' to assign all

I have a NSMUtableArray which has elements, for example: a,b,c,e And I want to add an object d to behind c and before e . In other words, I'd like to insert an object to a sorted array.(The object can be a custom object, too) I'd like to know : besides using for to find the position, is there any other method to implement it? It is better to use the iOS api. Thanks. You can use -[NSArray indexOfObject:inSortedRange:options:usingComparator:] to ask an NSArray for the index where an object should be inserted given an array range that’s currently sorted. For example, assuming the entire array is

EDIT: Here is a working version. I was able to retrieve my object within the NSMUtableArray after I saved and loaded it from the NSUserDefaults via NSCoding. I think it's important to mention, that you not only need to de-archive the array, but also all its content. As you can see, I had to not only store the NSData of my freeze object, but also the NSData of my array: // My class "Freeze" @interface Freeze : NSObject <NSCoding> // The NSCoding-protocoll is important!! { NSMutableString *name; } @property(nonatomic, copy) NSMutableString *name; -(void) InitString; @end @implementation Freeze

i create an array and i initialize it with objects. i tried to get access to the array object but i get a (null). what do i do wrong? photoArray = [[NSMutableArray alloc] init]; PhotoItem *photo1 = [[PhotoItem alloc] initWithPhoto:[UIImage imageNamed:@"1.jpg"] name:@"roy rest" photographer:@"roy"]; PhotoItem *photo2 = [[PhotoItem alloc] initWithPhoto:[UIImage imageNamed:@"2.jpg"] name:@"roy's hand" photographer:@"roy"]; PhotoItem *photo3 = [[PhotoItem alloc] initWithPhoto:[UIImage imageNamed:@"3.jpg"] name:@"sapir first" photographer:@"sapir"]; PhotoItem *photo4 = [[PhotoItem alloc]

I am having problem with adding objects to NSMutableArray *array. // Controller.m #import "Controller.h" @implementation Controller - (void)parser:(NSString *)string{ [array addObject:string]; NSLog(@"answerArray(1): %@",[array objectAtIndex:1]); [array retain]; } @end // Controller.h #import <Foundation/Foundation.h> @interface Controller : NSObject { NSMutableArray *array; } - (void)parser:(NSString *)string; @end NSLog(@"answerArray(1): %@",[array objectAtIndex:1]); Results: answerArray(1): (null) First off, you're over-retaining the array. Second, you didn't provide the code for

How to add CGMutablePathRef to NSMutableArray? CGMutablePath path = <... your path ...>; [mutableArray addObject:(id)path]; CGPath and CGMutablePath are just opaque CFType object types, and those can be added (via casting to id ) to any Cocoa container classes that are toll-free bridged to their CoreFoundation counter-parts. You can wrap CGMutablePathRef to a NSValue and store it in array. Then when needed unwrap it: //Wrap NSValue *pathValue = [NSValue valueWithPointer: path]; [array addObject:pathValue]; //Unwrap NSValue *pathValue = [array objectAtIndex: index]; CGMutablePathRef path =