I'm trying to parse XML directly from an HTTPS URL, as follows: NSString *const URL = @"https://some/HTTPS/url"; NSURL* url = [NSURL URLWithString:URL]; NSXMLParser* parser = [[NSXMLParser alloc] initWithContentsOfURL:url]; [parser setDelegate:self]; [parser parse]; I have the following delegate method for the parser: - (void) parser...
I have a weird design situation that I've never encountered before... If I were using Objective-C, I would solve it with categories, but I have to use C# 2.0. First, some background. I have two abstraction layers in this class library. The bottom layer implements a plug-in architecture for components that scan content (sorry, can't be m...
Initial Googling indicates that there's no built-in way to do regular expressions in an Objective-C Cocoa application. So four questions: Is that really true? Are you kidding me? Ok, then is there a nice open-source library you recommend? What are ways to get close enough without importing a library, perhaps with the NSScanner class? ...
Here's a piece of code to take a string (either NSString or NSAttributedString) input that represents a command line and parse it into two strings, the command cmd and the arguments args: NSString* cmd = [[input mutableCopy] autorelease]; NSString* args = [[input mutableCopy] autorelease]; NSScanner* scanner = [NSScanner scannerWithStri...
I'm currently writing an iPhone application that uses a UITabBarController with more than 5 Tab Bar Items. Thus, a 'more' tab is automatically generated (like in the YouTube Application). I found out that the corresponding view controller class is UIMoreListController, but I don't have any corresponding .h files. So, my code looks like t...
I'm having trouble understanding when to use properties in Objective C 2.0. It seems you do not need a property for a primitive type such as: int, bool, float. Is this true? I have seen examples showing properties for these types and other leaving them out. For example, in Apple's sample code they have: ... @interface Book : NSObject { ...
Given a struct, e.g. typedef struct { int value; } TestStruct; Why does the following code (in the context of an Objective-C class running on the IPhone) throw a "non-aligned pointer being freed" exception? TestStruct ts = {33}; free(&ts); N.B. My uber goal is to use a C library with many vector-math functions, hence the need to ...
Consider the following: typedef struct { float m00, m01, m02, m03; float m10, m11, m12, m13; float m20, m21, m22, m23; float m30, m31, m32, m33; } Matrix; @interface TestClass : NSObject { Matrix matrix; } - (TestClass *) init; @end @implementation TestClass - (TestClass *) init { self = [super init]; matrix = (Matri...
I'm building a app that need manage money datatype. I'm new on Obj-c, so I can't see the ligth in the use of NSDecimalNumber. For example, in my unit test I do this: @interface SamplePerson : NSObject { NSString *name; NSDate *birthDate; NSInteger size; NSNumber *phone; NSDecimal balance; BOOL *isOk; } @proper...
I wonder if it is possible (and how) to provide a class in Objective-C with something like: Person.Select(@"Name").OrderAsc(@"Name").Where(@"Id").EqualTo(1).And(@"Id").NotEqualTo(2).Load<Array> That could be very handy for a project I'm doing. I like this way of coding present in Django & SubSonic. ...
When retrieving objects from an NSMutableArray in cocoa-touch is the below code ok? Should I be allocating([alloc]) new Page objects each time or is just pointing to it alright? Do I need to do anything to the Page *pageObj after, such as set it to nil? const char *sql = "insert into Page(Book_ID, Page_Num, Page_Text) Values(?, ?, ?)"; ...
Hi, I have this: -(NSDictionary *)properties; +(NSDictionary *)ClassProperties; Now, how can I call ClassProperties from sub-classes? -(NSDictionary *)properties { return [? ClassProperties]; } The point is that ClassProperties gets the list of properties in the class, so i can't call the base class definition. ...
I'm getting this message each time I compile my project: RunIPhoneUnitTest.sh: line 92: 31389 Abort trap "$TARGET_BUILD_DIR/$EXECUTABLE_PATH" -RegisterForSystemEvents I understand is a problem in my code, but then I don't figure how solve or found it. The strange thing, is that I get this with this call: -- This is the ...
I've looked through all the class documentation for Core Data and I can't find away to programmatically update values in a core data entity. For example, I have a structure similar to this: id | title ============ 1 | Foo 2 | Bar 3 | FooFoo Say that I want to update Bar to BarBar, I can't find any way to do this in any ...
Hi, in python is easy build a dictionary or array and pass it unpacked to a function with variable parameters I have this: - (BOOL) executeUpdate:(NSString*)sql, ... { And the manual way is do this: [db executeUpdate:@"insert into test (a, b, c, d, e) values (?, ?, ?, ?, ?)" , @"hi'", // look! I put in a ', and I'm not escaping i...
I've seen it claimed that the following are "pretty much equivalent": foo([NSString stringWithString:@"blah"]) # version 1 foo([[[NSString alloc] initWithString:@"blah"] autorelease]) # version 2 Are the above in fact literally equivalent or are there any subtle differences? What are reasons to prefer one or th...
In C, something like the following would be a disaster (ie, a memory leak) because you're returning a pointer to memory that you will never be able to free: NSString* foo() { return [NSString stringWithFormat:@"%i+%i=%i", 2, 2, 2+2]; } Is that in fact totally fine in Objective-C since the memory that the returned pointer points to w...
Hi there, anybody know how I can set the maximum amount of characters in a TextField on the iPhone SDK when I load up the UIView ? ...
In my iPhone app I employ NSDecimalNumber to store some some currency rate values. I pull the data from the web the first time the app is launched and then again when they become obsolete, and I store them in a NSDictionary; then I use writeToFile:atomically:. When the app is launched for the first time, my rate conversion method works ...
I'm just learning Objective-C/Cocoa programming for the Mac. All of the tutorials, books, blogs, podcasts, etc. I've been using really cover the two together. Is there an easy way to tell which pieces are vanilla Objective-C and which come from Cocoa? ...