iphone - set border for grouped UITableView -

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i want set border uitableview. dont want seperators highlighted. if set clear clor seperator, border table set clear color. want black colored border table. how this? please help.

try code.

also import quartzcore framework

tableview.layer.borderwidth=4.0;
  
tableview.layer.bordercolor=[[uicolor blackcolor]cgcolor];


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