Setting a symbolic breakpoint for -[NSObject doesNotRecognizeSelector:] should do the trick. In Xcode 4, press cmd+6 to go to the Breakpoint Navigator, then click the +and choose “Add Symbolic Breakpoint…”. Configure.
Directly from Apple: The NSNull class defines a singleton object you use to represent null values in situations where nil is prohibited as a value (typically in a collection object such as an array or a dictionary). So in your example, that’s exactly what’s happening, the programmer is choosing to put a null object into … Read more
Stealing @martin-baulig’s answer: Try a full rebuild / clean. It’s possible that the previous build has been abnormally aborted, leaving the TWRAppDelegate.o file corrupted or zero-size.
First, you might consider using a class to hold your inner array’s strings, or loading it from a plist file (in which it is easy to make an 2d array of strings). For direct declarations, you have a couple of options. If you want to use an NSArray, you’ll have to manually create the structure … Read more
Have you read the documentation for applicationWillTerminate:, It says, For applications that do not support background execution or are linked against iOS 3.x or earlier, this method is always called when the user quits the application. For applications that support background execution, this method is generally not called when the user quits the application because … Read more
Nothing! Dot-notation is “syntactic sugar” introduced in Objective-C 2.0. In fact, the compiler converts foo.property to [foo property] during compile-time, so they compile to exactly the same thing. It’s simply a matter of which you prefer.
Here’s how I got this problem: I added a .h, .m and NIB from another project by dragging them onto my project navigator. Xcode didn’t add them to the Build Phases properly. My solution for this problem: Go to the Target in the navigator menu Click on the “Build Phases” tab Add the .m file … Read more
Have you tried creating an NSDate from that and printing that using an NSDateFormatter? NSDate *date = [NSDate dateWithTimeIntervalSince1970:[theNumber doubleValue]]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@”HH:mm:ss”]; NSLog(@”%@”, [formatter stringFromDate:date]); [formatter release]; If you need the individual values for hours, minutes, and seconds, use NSDateComponents as suggested by nall. The above won’t print the … Read more
It may be a server certificate problem…. Check here, I solved my kSecTrustResultRecoverableTrustFailure problem, adding subjectAltName = DNS:example.com into openssl config file, specifically in server key generation… If you are not using openssl to generate it, I’m sorry but I can help you.. Anyway if you want to use openssl, here is a good tutorial … Read more
There’s a function called CGRectIntersectsRect which receives two CGRects as arguments and returns if the two given rects do intersect. And UIView has subviews property which is an NSArray of UIView objects. So you can write a method with BOOL return value that’ll iterate through this array and check if two rectangles intersect, like such: … Read more