Display NSMutableArray in UIlabel in xcode

Question

I have to display NSmutableArray data in UIlabel .But only the last index text is getting added .Here is my code

marray:
(
{ 
ID=1;
}
{
ID="2"
}
)

 for(int i=0;i<[marray count];i++)
    {
        eventName=[[arr2 objectAtIndex:i]objectForKey:@"Code"];
       label.text=[NSString stringWithFormat:@"ID :%@",eventName ];        
    }

I have to display these ID's in UIlabel with text as : 1 , 2

How can I do it?

freelancer · Accepted Answer · 2012-10-16 07:21:43Z

1

you can append string to NSString object than use that object in label like bellow

NSMutableString *lblstr=@"ID :";

for (int i=0; i<[marray count]; i++) {
    eventName=[[arr2 objectAtIndex:i]objectForKey:@"Code"];
    [lblstr appendString:[NSString stringWithFormat:@"%@",eventName ]];
}
label.text=lblstr;

answered Oct 16, 2012 at 7:21

freelancer

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2 Comments

IronManGill Over a year ago

Appending the string wont help it being displayed coz the for loop runs pretty fast doesn't it ?

07405 Over a year ago

I m getting error at this line [lblstr appendString:[NSString stringWithFormat:@"%@",eventName ]];.Program received SIGABRT ..IN console area I can see "Attempt to mutate immutable object with appendString:'"What shall I do?

Community · Accepted Answer · 2017-05-23 12:18:50Z

1

You are running a for loop which will continue executing till its last increment . So the last value in the array would be displayed. So what you can do is that you can add a timer instead of a for loop that is if you want to show your NSmutableArray as changing in the UILabel.

EDIT:

-(IBAction) rotate3
{
    NSString *number = [self.dayArray description];
    NSArray *array = [[NSArray alloc] initWithObjects: @"0", @"1", @"2", @"3", @"4", @"5" ,@"6", @"7", @"8",@"9",@"10",@"11",@"12",@"13", @"14", @"15", @"16", @"17", @"18", @"19",nil];
    numberCount++;
    timer=[NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(rotate3 )userInfo:nil repeats:YES];    
    self.dayArray = array;
    [array release];

    label.text = [NSString stringWithFormat:@"Day %@  ", number];
}

Also check these links How to update UILabel programmatically in iOS and How to display an NSArray in a UILabel and use timer

edited May 23, 2017 at 12:18

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answered Oct 16, 2012 at 7:14

IronManGill

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1 Comment

07405 Over a year ago

But I want all the items of NSMutableArray in label's text>How can I do it?

Pandey_Laxman · Accepted Answer · 2012-10-16 08:53:30Z

0

Try the below Code. 
NSString *temp=@"";
for(int i=0;i<[marray count];i++)
    {

        //eventName=[[arr2 objectAtIndex:i]objectForKey:@"Code"];
        temp=[temp stringByAppendingString:[[arr2 objectAtIndex:i]objectForKey:@"Code"]];

        temp=[temp stringByAppendingString:@" ,"];
    } 
 temp = [temp substringToIndex:[temp length]-1];
label.text=[NSString stringWithFormat:@"ID :%@",temp ];

edited Oct 16, 2012 at 8:53

answered Oct 16, 2012 at 7:18

Pandey_Laxman

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7 Comments

07405 Over a year ago

.I got it working partially .I want in this format 1 , 2.i.e a space and comma after each item

Pandey_Laxman Over a year ago

Check my edited Answer if it is useful plz accept it my clicking on checkmark and upvote by up arrow

07405 Over a year ago

Thanks I got it. I have a small question .Here if I have more Ids like 3,4,5,6 ...then am unable to see it in label .that part is cut .so if I want to display content in such a away that if its not sufficient in the first line then it should be displayed in the next line and so on....How can I do it ?this is the label I m doing label=[[UILabel alloc]init]; [label setFrame:CGRectMake(20,175,330, 60)]; label.textAlignment=UITextAlignmentLeft; label.backgroundColor=[UIColor clearColor];

Pandey_Laxman Over a year ago

You can make multiLine label. yourLable.numberofLines=10; then increase the height of label. or you can use UITextView for scrolling Label does not scroll you need to increase the height according to your data.

Pandey_Laxman Over a year ago

And you can use the description method of NSSArray to get all contents in string by NSString *arrContents=[arr description];

|

Hemang · Accepted Answer · 2012-10-16 07:39:10Z

0

NSMutableString *str = [[NSMutableString alloc] init];

for(int i=0;i<[marray count];i++)
{
   NSString *temp = [NSString stringWithFormat:@"%d - %@\n",i+1, [[arr2 objectAtIndex:i]objectForKey:@"Code"]];

  [str appendString:[NSString stringWithFormat:@"%@",temp]];

   //sleep(0.05); //Remove comment this line may help ! **Tricky Line**
}

label.text = str;

[str release];

answered Oct 16, 2012 at 7:39

Hemang

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Comments

MANIAK_dobrii · Accepted Answer · 2012-10-16 07:52:32Z

0

You may create an array of objects (indexes) and use componentsJoinedByString:

NSString* str = [array componentsJoindeByString: @", "];

Or using your code, replacing

label.text=[NSString stringWithFormat:@"ID :%@",eventName ];

with:

label.text=[label.text stringByAppendingFormat:@", %@", eventName];

answered Oct 16, 2012 at 7:52

MANIAK_dobrii

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