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[操作系统]【代码笔记】点击出现选择框


一,效果图。

二,工程图。

三,代码。

RootViewController.h

#import <UIKit/UIKit.h>@interface RootViewController : UIViewController<UIActionSheetDelegate>@end

 

RootViewController.m

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#import "RootViewController.h"@interface RootViewController ()@end@implementation RootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];  if (self) {    // Custom initialization  }  return self;}- (void)viewDidLoad{  [super viewDidLoad];  // Do any additional setup after loading the view.}//点击任何处,出现选择框-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{  UIActionSheet *actionsheet=[[UIActionSheet alloc]initWithTitle:@"Choose Source" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Photo album",@"Default photo", nil];  [actionsheet showInView:self.view];}- (void)didReceiveMemoryWarning{  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}
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