Best Of

Re: What is proper way to do UITextField text change call back?

Newbie09 wrote: »

Hi,
I have to do the same. I want a TableView to be populated based on the characters I enter. Let us say, if I start entering city name in the text field, I want the Tableview to be populated based on the characters entered
Eg. If I type "C", it should list Canberra, Chicago. If I type "Ca" it should display only "Canberrra" in the tableview. I am new to iPhone SDK. How do I do this? Any help in this regard is much appreciated

I catch the characters sent to a UITextField control something like this:

	// Add a "textFieldDidChange" notification method to the text field control.
	[textField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];

Then in the textFieldDidChange: method you can examine the contents of the textField, and reload your table view as needed.

daveruske

1 ·

Re: Recommended iPhone SDK Books

Another title I highly recommend is "Cocoa Design Patterns" by Eric Buck and Donald Yacktman. It describes the different design patterns used in the Cocoa frameworks, what problem each design pattern is intended to solve, and how it works.

It isn't specific to iOS. The content is just as applicable to iOS and Mac OS.

The first half of the book or so will be familiar to experienced Cocoa/Cocoa Touch developers. The later chapters, though, start getting into pretty advanced stuff like key value binding, proxies, associative storage, invocations, etc.

It could use a refresh to cover the new design patterns that have opened up as a result of code blocks being added to the language, but aside from that everything in the book is quite applicable, and very helpful in understanding why Cocoa programs (and the Cocoa/Cocoa touch frameworks) are built the way they are.

The first half of the book would be helpful to "advanced beginner" / low intermediate level developers, but still worth reading for more advanced developers. The last few chapters get quite advanced, and require careful study in order to understand them.

I would call this book a must have if you're serious about Mac or iOS development.

Duncan C

1 ·

Re: Question about collection

In addition to my previous answer to your similar question, you can't expand a tuple. A tuple is more like a struct than a collection. If you get an array of 3 items, you can append more data and get a total of 10 items. You can't do that with a tuple. A tuple defined as having 3 items will only ever have 3 items. You cannot append more data. You would have to change the definition of the tuple to have 10 items. Similarly you can't remove data from a tuple, and make it have 2 items now. Again you'd have to change the definition of the tuple.

BrianSlick

1 ·

Re: Apple to allow developers to respond to reviews?

astersdo wrote: »

The replies do not appear on desktop iTunes. Do they appear on the device? It looks like the original reviewer is the only person that sees your reply.

They appear on the device for everyone to see, but it has to be running iOS 10.3 or above.

tmongy

1 ·

what is the best way Clearing, releasing NSMutableArray? and when to do so?

Hi,

I have this array that I created using [[NSMutallableArray alloc] init],
What is the best way to clear and free up memory and when should I do it?

Method 1:

for(int i=0;i<[arrTiles count];i++)
{
    [arrTiles removeObjectAtIndex:i];
}
[arrTiles release];

Method 2:

arrTiles = nil;
[arrTiles release];

I'm thinking method 2 would be better b/c I don't have iterate through the entire array. Is setting an array to nil an expensive operation comparing to loop iteration?

Please tell me if there's a better way to release arrays.

Should I release it when I'm done with it in a method then re-allocate it when I need it again? or should I just let it hang around?

Does the rules as when to release depend on whether how the array was declared?
for example, either

[[NSMutableArray alloc] initWithCapacity:10]

or

[[NSMutallableArray alloc] init];

?

Thanks,

-FerrariX

FerrariX

1 ·

Re: Does Apple allow apps to load remote file for working?

I think what angelapps means is that it can't crash on startup. A ssh app is pretty useless without an internet connection. So as long as it can startup and request internet access to function it will be fine. Oh, and iPv6 network connection is a must nowadays.