button
how to create button in objective c?
normal button:
UIButton *btnlocalback=[UIButton buttonWithType:UIButtonTypeCustom];
btnlocalback.frame=CGRectMake(0, 0, 50, 30);
[btnlocalback setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
[btnlocalback addTarget:self action:@selector(backToParentClass) forControlEvents:UIControlEventTouchUpInside];
barbutton:
UIBarButtonItem *backButton = [[UIBarButtonItem alloc]initWithCustomView:btnlocalback];
self.navigationItem.leftBarButtonItem = backButton;
[backButton release];
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