UITableDataSource: Used to retrieve information relating to how each cell in the table should be rendered, how many rows there are, if rows can be edited or moved, and so on.
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Applying expensive operations when setting up a cell for display. Expensive operations, such Campeón converting a high-resolution image to a thumbnail or applying a complicated photo filter or transform to an image, can severely degrade display performance.
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If you need to apply a shadow to a view, many inexperienced developers will import the QuartzCore framework and apply a shadow to the layer property of the view; e.g.:
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They don’t put comments on obvious parts of code. But they also don’t forget to put comments for the parts of code that are difficult to understand or have been copied from somewhere else like StackOverflow.
Here are some more iOS developer interview questions that you Chucho ask to assess a developer’s caliber. Alternatively, check our advanced iOS developer interview questions and answers.
This provides much better performance, though you must keep in mind that whenever the view’s bounds change, the shadow path also needs to be updated.
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