Iterate through NS array of obs - iphone

Question

I need to take this data structure, an nsmutablearray, and iterate through each index and print each field into a textfield. every "forward" button increments the data ahead and "backwards" goes back. I am having a really hard time getting this to work properly, does anyone know what im doing wrong. Keep in mind, the object held in the array, called info_holder, is an object that holds 3 strings and one counter:
#import "ZDViewController.h"
#implementation ZDViewController
#synthesize password;
#synthesize count;
#synthesize web;
#synthesize username;
#synthesize header;
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *array = [[NSMutableArray alloc] init];
info_holder *set1 = [[info_holder alloc] init];
info_holder *set2 = [[info_holder alloc] init];
info_holder *set3 = [[info_holder alloc] init];
info_holder *set4 = [[info_holder alloc] init];
info_holder *set5 = [[info_holder alloc] init];
[set1 SetUser: #"info1"]; //temporary information until big is fixed
[set1 SetPass: #"info2"];
[set1 SetKey: #"webinfo1"];
[set1 SetCount: 0];
[set2 SetUser: #"info3"];
[set2 SetPass: #"info4"];
[set2 SetKey: #"webinfo2"];
[set2 SetCount: 0];
[set3 SetUser: #"info5"];
[set3 SetPass: #"info6"];
[set3 SetKey: #"webinfo3"];
[set3 SetCount: 0];
[set4 SetUser: #"info7"];
[set4 SetPass: #"info8"];
[set4 SetKey: #"webinfo4"];
[set4 SetCount: 0];
[set5 SetUser: #"info9"];
[set5 SetPass: #"info10"];
[set5 SetKey: #"Webinfo5"];
[set5 SetCount: 0];
}
- (void)viewDidUnload
{
[self setHeader:nil];
[self setWeb:nil];
[self setPassword:nil];
[self setCount:nil];
[self setUsername:nil];
[super viewDidUnload];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (IBAction)increment:(id)sender {
if(username.text==#"test")
username.text=#"test2";
else
username.text=#"test";
//this should print a new username NSSTRING, wedsite NSTRING, password NSTRING and INEGER counter, heald in the info_holder object, incremented per click backwards
}
- (IBAction)decrement:(id)sender {
}
- (IBAction)Inc:(id)sender {
}
- (IBAction)textFieldDoneEditing:(id)sender {
[sender resignFirstResponder];
}
- (IBAction)backgroundTap:(id)sender {
[web resignFirstResponder];
[username resignFirstResponder];
[count resignFirstResponder];
[password resignFirstResponder];
}
#end
and my main is:
#import <UIKit/UIKit.h>
#import "ZDAppDelegate.h"
#import "info_holder.h"
int main(int argc, char *argv[])
{
#autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([ZDAppDelegate class]));
}
}

Answer 1

- (IBAction)forwards:(id)sender {
//this should print a new username NSSTRING, wedsite NSTRING, password NSTRING and INEGER counter, heald in the info_holder object, incremented per click forward
for(int i=0;i<your_array.count;i++){
username.text=[your_array objectAtIndex:i];
password.text=[your_array objectAtIndex:i];
key.text.text=[your_array objectAtIndex:i];
}
}
Note-1: I assume your texrfield names as username, password and key
Note-2: Your question is too long an i think no one will read so many code to find your matter. Just share what you need .

Answer 2

First, Class names should start in Caps and method names should start in lower case.
Second, your setters in info_holder class (which should be InfoHolder) have potential issues.
an example setter should look like:
- (void)setUser:(NSString *)username
{
[username retain];
[uname release];
uname=username;
}
You didn't state what's not working, but one problem is that you're not retaining those strings.
BASED ON COMMENTS
You need to declare logins a property.
in ZDViewController.h
#interface ZDViewController : UIViewController
#property (strong, nonatomic) NSMutableArray *logins;
Then in ZDViewController.m
#implementation ZDViewController
#synthesize logins;
.
.
.
- (void)viewDidLoad {
logins = [NSMutableArray array];
.
.
.
}
Then you can access self.logins from anywhere in your class

Answer 3

did you stored your info_holder objects into the NSMutableArray instance, If so then you can access the element(info holder instances in your case) of mutable array by either one of the below method,for(ClassName *tmp in _arrayName){ tmp.property1;tmp.property2;..... }or if you want it as index specific for(int index=0;index<[_arrayName count];index++){ ClassName *tmp = [_arrayName objectAtIndex:index];tmp.property1;tmp.property2;.....}. I exactly can't understand your problem but from your writings i guess thee above can be the solution. If not let me know your question , if this certainly helped you then accept the answer. Note: As #dbrajkovic suggest , always follow the naming convention in your programs, that give more flexible readability.