platform :ios, '7.0'
pod "CocoaPicker"
self.view.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext;//半透明
CocoaPickerViewController *transparentView = [[CocoaPickerViewController alloc] init];
transparentView.delegate = self;
transparentView.modalPresentationStyle = UIModalPresentationOverFullScreen;
transparentView.view.frame=self.view.frame;
transparentView.view.superview.backgroundColor = [UIColor clearColor];
[self presentViewController:transparentView animated:YES completion:nil];
