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In objective-c code:

yourWebViewInstance.backgroundColor = [UIColor clearColor];
yourWebViewInstance.opaque = NO;
…

Sometimes We want to add the content to UITableViewCell without the frame of the cell, actually we can use backgroundView of cell to remove the frame of the cell…

Is that kinda difficult for catching memory leaks when debug your apps in Xcode, here is the method that is gonna tell you how to find bugs more quickly …

Grand Central Dispatch (GCD) is a relatively new approach to multicore programming developed by Apple. It made its debut in Mac OS X 10.6 Snow Leopard, and was recently introduced to iOS 4.0. …

iOS tables can be only one column wide.

class: 
UITableView
Each visible row of the table is implemented by the class UITableViewCell. So, a table view is the object that displays the visible part of a table, and a table view cell is responsible for displaying a single row of the table (see Figure) …