1.//狀態(tài)欄及背景 ?當(dāng)一個(gè)頁面需要navigation的樣子 卻又不要navigation時(shí) 可以這樣加一個(gè)view，注意是從0開始

UIView * statusBarBgView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, 64)];

statusBarBgView.backgroundColor = REDCOLOR;

[self.navigationController.view addSubview:statusBarBgView];

2.xib拖的UiScrollView,不能禁止上下，或者左右滑動(dòng)，在如下地方設(shè)置

禁止上下滾動(dòng)選箭頭那個(gè)，禁止水平滾動(dòng)選下面那個(gè)

在代碼中在配合bgScrollView.contentSize = CGSizeMake(你要的寬度, 0);

就可以禁止上下滾動(dòng)了

3.使用UIAlertController

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"請(qǐng)選擇" message:@"" preferredStyle: UIAlertControllerStyleActionSheet];

UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];

UIAlertAction *photographAction = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

[self takePhoto];

}];

UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"去相冊(cè)選擇" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

[self pushImagePickerController];

}];

[alertController addAction:cancelAction];

[alertController addAction:photographAction];

[alertController addAction:albumAction];

[self presentViewController:alertController animated:YES completion:nil];