大约有 3,000 项符合查询结果(耗时:0.0123秒) [XML]

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iPhone SDK: what is the difference between loadView and viewDidLoad?

...re-Interface-Builder examples, is more like this: UIView *view = [[UIView alloc] init...]; ... [view addSubview:whatever]; [view addSubview:whatever2]; ... self.view = view; [view release]; And I don't blame you for not using IB. I've stuck with this method for all of Instapaper and find myself m...
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What's the point of malloc(0)?

... According to the specifications, malloc(0) will return either "a null pointer or a unique pointer that can be successfully passed to free()". This basically lets you allocate nothing, but still pass the "artist" variable to a call to free() without worry. F...
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Arrays, heap and stack and value types

... Your array is allocated on the heap, and the ints are not boxed. The source of your confusion is likely because people have said that reference types are allocated on the heap, and value types are allocated on the stack. This is not an e...
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Arrays vs Vectors: Introductory Similarities and Differences [closed]

...ze; you can't resize an array in C++ (unless it's an array of POD and it's allocated with malloc); their size must be a compile-time constant unless they are allocated dynamically; they take their storage space depending from the scope where you declare them; if dynamically allocated, you must expli...
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Create tap-able “links” in the NSAttributedString of a UILabel?

... NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"String with a link" attributes:nil]; NSRange linkRange = NSMakeRange(14, 4); // for the word "link" in the string above NSDictionary *linkAttributes = @{ NSForegroundColorAttributeName : [UIColor colo...
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iOS 7 parallax effect in my view controller

...atingMotionEffect *verticalMotionEffect = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis]; verticalMotionEffect.minimumRelativeValue = @(-10); verticalMotionEffect.maximumRelativeValue = @(10); // Set hor...
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Download a single folder or directory from a GitHub repo

...ss dashboard and wait for browser trigger download. Get the ZIP file. Get Token: Click GitZip Extension icon on your browser. Click "Normal" or "Private" link besides "Get Token". Authorize GitZip permission on Github auth page. Back to repo page of the beginning. Continue to use. Option 2: Gith...
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Creating C formatted strings (not printing them)

...specifiers. Additional arguments are ignored by the function. Example: // Allocates storage char *hello_world = (char*)malloc(13 * sizeof(char)); // Prints "Hello world!" on hello_world sprintf(hello_world, "%s %s!", "Hello", "world"); ...
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Are memory leaks ever ok? [closed]

... Technically, a leak is memory that is allocated and all references to it are lost. Not deallocating the memory at the end is just lazy. – Martin York Nov 7 '08 at 19:13 ...
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How to use single storyboard uiviewcontroller for multiple subclass

...... This simply changes the isa pointer of the given pointer and doesn't reallocate memory to accommodate for e.g. different properties. One indicator for this is that the pointer to self doesn't change. So inspection of the object (e.g. reading _ivar / property values) after object_setClass can cau...