iOS中UITextField禁止粘贴、禁止选择、禁止全选

//第1种方法
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{

if (action == @selector(paste:))//禁止粘贴

return NO;

if (action == @selector(select:))//
禁止选择

return NO;

if (action == @selector(selectAll:))//
禁止全选

return NO;

return [super
canPerformAction:action withSender:sender];
}

//第2种方法

//-(BOOL)canPerformAction:(SEL)action withSender:(id)sender {

// UIMenuController *menuController = [UIMenuController sharedMenuController];

// if (menuController) {

// [UIMenuController sharedMenuController].menuVisible = NO;

// }

// return NO;

//}