A common reason behind exc_bad_access problems that are not detectable because of the compiler is seeking to obtain launched objects. In these kinds of conditions, enabling NSZombies in Xcode can be a highly effective debugging strategy. Enabling NSZombies keeps objects that may Ordinarily be produced alive as “zombies”.
Once the layer Using the shadow is rasterized, it is rendered as being a bitmap in its area coordinate Area then composited to the destination. Right here’s an illustration of how you could rasterize your shadow results:
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A group is a way to increase an present course and is particularly an alternative to the usage of subclasses. The principle difference concerning subclassing and groups is the fact a category provides functionality to an existing course alone and that is then accessible everywhere inside your code that utilizes that course or its subclasses.
This guideline provides a sampling of powerful questions that will help Consider the breadth and depth of a candidate's mastery of your iOS platform.
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If a whole new cell is to look With all the same reuse identifier, the cached mobile is utilized plus the high priced operation of allocating and laying out a wholly new cell is prevented. As an alternative the cached mobile have to only be reconfigured to display The brand new content, for example updating the textual content and image that is certainly exhibited.
An additional limitation of the category is always that it can't outline new instance variables for a category. Nevertheless, a qualified developer will be aware you can define new condition objects affiliated with the class employing Aim-C runtime strategies, which delivers a way for any category to keep point out changes.