//获取剪贴板
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
//设置剪贴板内容
pasteboard.string = [defaults objectForKey:@"shareURL"];
if (pasteboard.string) {
_alertView = [[AlertView alloc] initWithFrame:CGRectMake((UIScreen_width-(UIScreen_width/320)*150)/2, (UIScreen_width/320)*220, (UIScreen_width/320)*150, (UIScreen_width/320)*30)];
[_alertView createAlertViewWithTitle:@"已复制到粘贴板" delayInSeconds:2 completion:^{
[_alertView removeFromSuperview];
}];
[self.view addSubview:_alertView];
} else {
_alertView = [[AlertView alloc] initWithFrame:CGRectMake((UIScreen_width-(UIScreen_width/320)*150)/2, (UIScreen_width/320)*220, (UIScreen_width/320)*150, (UIScreen_width/320)*30)];
[_alertView createAlertViewWithTitle:@"复制失败" delayInSeconds:2 completion:^{
[_alertView removeFromSuperview];
}];
[self.view addSubview:_alertView];
}