cocoa-touch

问题 I'm calling the following code from drawRect - (void) drawPartial:(UIImage *)img colour:(UIColor *)colour { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSaveGState(context); CGContextTranslateCTM(context, 0.0, self.bounds.size.height); CGContextScaleCTM(context, 1.0, -1.0); CGContextDrawImage(context, self.frame, img.CGImage); if (colour!=nil) { CGContextSetBlendMode (context, kCGBlendModeColor ); CGContextClipToMask(context, self.bounds, img.CGImage); CGContextSetFillColor

问题 I have an iPhone app with a tableviewcontroller. When you click a certain cell it opens a new uiviewcontroller with this code: nextViewController = [[avTouchViewController alloc] initWithNibName:@"avTouchViewController" bundle:nil]; The uiviewcontroller above called avTouchViewController has a property that looks like: IBOutlet SomeObject *controller; SomeObject is an object with all relevant view properties. I would like to pass an nsstring parameter from the tableviewcontroller I initialize

问题 this is the code i have taken form..... - (void)willPresentAlertView:(UIAlertView *)alertView { [[[alertView subviews] objectAtIndex:2] setBackgroundColor:[UIColor colorWithRed:0.5 green:0.0f blue:0.0f alpha:1.0f]]; } - (void) presentSheet { UIAlertView *baseAlert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"This alert allows the user to choose between a 'safe' and a 'deadly' choice, indicated by button color.\n\n\n\n" delegate:self cancelButtonTitle:nil otherButtonTitles:@"Deadly!

问题 I have added GTMBase64.h and GTMBase64.m file into my project. However i can't use GTMBase64 in my code. It only show GTM_INLINE instead of GTMBase64 . Is there any framework i need to add to use GTMBase64 ? Thanks for any help. 回答1: I just got solution for my own question. Here is complete solution if you want to use GTMBase64 in your project. First download two GTMBase64.h and GTMBase64.m file. GTMBase64.h GTMBase64.m and download another file too. GTMDefines.h And then add these three

问题 I'm getting this error malloc: * * * error for object 0x8a591d4: incorrect checksum for freed object - object was probably modified after being freed. *** set a breakpoint in malloc_error_break to debug No memory available to program now: unsafe to call malloc No memory available to program now: unsafe to call malloc It comes from this line NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"Info" ofType:@"plist"]; NSData *plistData = [NSData dataWithContentsOfFile:plistPath];

问题 Thanks for all your help, as usual, i am looking for some more information... Regarding view controllers, i am trying to develop an application with multiple views. View Controller loads from View A using presentModalViewController - and loads View B from there - also works fine, but i have some nagging questions... View A has a table in it, which drills down to View B, and i can move back to view A usig dismissModalViewController, but once back in View A i can't access the table in View A.

问题 I have a UIViewController that has a UITableView as a subview. I am trying to add a pull-to-refresh on the table. Following some examples and discussions that I found here, I have the UIRefresh showing but it never calls the selector. I am not getting notified that the pull action happened. I cannot use a UITableViewController as my main controller as I need to add a fixed button at the bottom of the screen. I have the feeling I am missing something out that hopefully is obvious to someone

问题 I have an AQGridView set up to display the files in the documents directory along with 4 other documents that are predefined and loaded into the table at startup. I need to know how I can set the cell to hold the URL of the document (yes, even the predefined ones! They are all just NSStrings after all.) so it can be called later with - (void)gridView:(AQGridView *)gridView didSelectItemAtIndex:(NSUInteger)index { NSString *fileURL = [self._icons objectAtIndex:index]; // do stuff } and loaded

问题 In my scenario I have 2 view controllers, one tied to the main view and one that is connected to the first one as a subview. Now let's say that my App Delegate class wants to pass a string to the subview controller. What is the best practice to achieve this? If I wanted to pass it to the 1st controller i could just say something like [self.firstController getStringInCustomFunction:[NSString stringWithFormat:@"200%d", 9]]; Also keep in mind that this call might have to be asynchronous. Coming

问题 In my scenario I have 2 view controllers, one tied to the main view and one that is connected to the first one as a subview. Now let's say that my App Delegate class wants to pass a string to the subview controller. What is the best practice to achieve this? If I wanted to pass it to the 1st controller i could just say something like [self.firstController getStringInCustomFunction:[NSString stringWithFormat:@"200%d", 9]]; Also keep in mind that this call might have to be asynchronous. Coming