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三十三:IOS多视图跳转方法
第一种: 跳转:[self presentModalViewController:control animated:YES]; 返回:[self dismissModalViewControllerAnimated:YES]; 第二种: 跳转:[self.navigationController pushViewController:subTableViewController animated:YES]; 返回:[self.navigationController popViewControllerAnimated:YES]; 第三种:自己控制: [self.view addSubview:<#(UIView *)#>] [self.view removeFromSuperview]; 注意:pushViewController和popViewController进行视图间的切换,就必须要求当前视图是个NavigationController,
第四种:
// 根据Segue ID 执行跳转
[self performSegueWithIdentifier:@"contactList" sender:nil];
三十四:presentModalViewController
与dismissModalViewControllerAnimated注意事项
在实际开发中,如果要弹出视图: 我们常用到presentModalViewController方法和dismissModalViewControllerAnimated方法。 presentModalViewController:弹出视图 dismissModalViewControllerAnimated:隐藏视图 弹出视图: FeedbackViewController *feedbackViewController = [[FeedbackViewController alloc]initWithNibName:@"FeedbackViewController" bundle:nil]; UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:feedbackViewController]; [self presentModalViewController:navigationController animated:YES]; 隐藏视图: [self dismissModalViewControllerAnimated:YES]; 关于这两个方法的几点说明: 1.iPhone上弹出/隐藏 视图时,使用为全屏模式 2.搞清楚谁是presenting,谁是presented 如果A弹出B,那么A为presenting,B为presented。 3.隐藏视图的策略 我们假如A弹出B 就是说,A负责隐藏B;如果我们在B中调用dismissModalViewControllerAnimated方法,那么编译器,自动将消息发送给A。 等等,什么消息? 简单的理解,当执行presentModalViewController:方法:在A弹出B时: 执行A的viewWillDisappear方法, 通知B执行自己的viewWillAppear方法和viewDidAppear 执行A的viewDidDisappear方法 当执行dismissModalViewControllerAnimated方法:隐藏B时: 执行B的viewWillDisappear 通知A执行自己的viewWillAppear方法和viewDidAppear方法 执行B的viewDidDisappear方法 以下我做了个测试来输出一轮AB切换: A:More B:Feed 2012-12-27 14:01:23.666 WTV[1627:11303] -More--viewWillDisappear---- 2012-12-27 14:01:23.672 WTV[1627:11303] -Feed--viewWillAppear---- 2012-12-27 14:01:24.086 WTV[1627:11303] -Feed--viewDidAppear---- 2012-12-27 14:01:24.087 WTV[1627:11303] -More--viewDidDisappear---- 2012-12-27 14:01:25.745 WTV[1627:11303] -Feed--viewWillDisappear---- 2012-12-27 14:01:25.745 WTV[1627:11303] -More--viewWillAppear---- 2012-12-27 14:01:26.156 WTV[1627:11303] -More--viewDidAppear---- 2012-12-27 14:01:26.157 WTV[1627:11303] -Feed--viewDidDisappear---- 当我们信心慢慢,庆幸我们可以了解了这两个方法时,悲剧发生了: 4.苹果官方已经把这两个方法 Deprecated in iOS 6.0. 了 - (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated; - (void)dismissModalViewControllerAnimated:(BOOL)animated; 取而代之的是: [self presentViewController:navigationController animated:YES completion:^(void){ // Code }]; [self dismissViewControllerAnimated:YES completion:^(void){ // Code }]; 新接口的差别是提供了一个参数,允许你传入一个block。这个block的回调方法在VC的viewWillDisappear方法后调用。也就是被隐藏的VC对象被释放后运行回调。 这样做的好处:可以方便做多个UI效果之间的衔接和转换。
三十五:视图跳载的几种动画
BaiDuViewController* baiduController=[mainStoryboard instantiateViewControllerWithIdentifier:@"baiduStoryboard"]; baiduController.modalTransitionStyle=UIModalTransitionStyleFlipHorizontal; [self presentViewController:baiduController animated:YES completion:^{ }];
三十六:JSONKit的使用方法
json开源的类库有很多,其中JSONKit库是非常简单易用而且效率又比较高的,重要的JSONKit适用于ios 5.0以下的版本。 下载地址:https://github.com/johnezang/JSONKit 使用JSONKit库来解析json文件,只需要下载JSONKit.h 和JSONKit.m添加到工程中,设置支持arc,在项目中build phases中的compile sources,选择jsonkit.m然后确认键输入-fno-objc-arc #import "JSONKit.h" //假设 strJson 是网络上接收到的 json 字符串, NSString *strJson = @"[{\"Id\": 1,\"BrandName\": \"爱马仕\" },{\"Id\": 2,\"BrandName\": \"安娜苏\"}]"; NSArray *arrlist=[strJson objectFromJSONString]; NSLog(@"%d",[arrlist count]); for (int i=0; i<[arrlist count]; i++) { NSDictionary *item=[arrlist objectAtIndex:i]; NSString *BrandName=[item objectForKey:@"BrandName"]; NSLog(@"%@",BrandName); } 字典arrlist便是解析好的json文件了。 JSONKit库也可以用来生成json文件 NSMutableDictionary *jsonDic = [NSMutableDictionary dictionary]; NSMutableDictionary *alert = [NSMutableDictionary dictionary] ;NSMutableDictionary *aps = [NSMutableDictionary dictionary]; [alert setObject:@"a msg come!" forKey:@"body"]; [aps setObject:alert forKey:@"alert"]; [aps setObject:@"3" forKey:@"bage" ]; [aps setObject:@"def.mp3" forKey:@"sound"]; [jsonDic setObject:aps forKey:@"aps"]; NSString *strJson = [jsonDic JSONString]; 另一个,其中operation.responseString就是下面那串json字符串,通过它进行解析: NSDictionary* resultDictionary=[operation.responseString objectFromJSONStringWithParseOptions:JKParseOptionLooseUnicode]; NSLog(@"%@ Items Found!",[resultDictionary objectForKey:@"weatherinfo"]); //{"weatherinfo":{"city":"北京","cityid":"101010100","temp":"3","WD":"北风","WS":"3级","SD":"24%","WSE":"3","time":"11:25","isRadar":"1","Radar":"JC_RADAR_AZ9010_JB","njd":"暂无实况","qy":"1028"}} self.weaLableInfo.text=[NSString stringWithFormat:@"城市:%@,温度:%@",[[resultDictionary objectForKey:@"weatherinfo"]objectForKey:@"city"],[[resultDictionary objectForKey:@"weatherinfo"]objectForKey:@"temp"]];
三十七:三十五:afnetworking2.0运用,结合json,
引入afnetworking文件后,引入头文件就可以使用,支持arc
- (IBAction)JsonAction:(UIBarButtonItem *)sender { NSString* weatherUrl=[NSString stringWithFormat:@"%@%@.html",BaseURLString,self.UrlString]; AFHTTPRequestOperationManager* manager=[AFHTTPRequestOperationManager manager]; manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"]; [manager GET:weatherUrl parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) { NSDictionary* resultDictionary=[operation.responseString objectFromJSONStringWithParseOptions:JKParseOptionLooseUnicode]; NSLog(@"%@ Items Found!",[resultDictionary objectForKey:@"weatherinfo"]); //{"weatherinfo":{"city":"北京","cityid":"101010100","temp":"3","WD":"北风","WS":"3级","SD":"24%","WSE":"3","time":"11:25","isRadar":"1","Radar":"JC_RADAR_AZ9010_JB","njd":"暂无实况","qy":"1028"}} self.weaLableInfo.text=[NSString stringWithFormat:@"城市:%@,温度:%@",[[resultDictionary objectForKey:@"weatherinfo"]objectForKey:@"city"],[[resultDictionary objectForKey:@"weatherinfo"]objectForKey:@"temp"]]; } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error:%@",error); }]; } 带post参数到服务端 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; //申明返回的结果是json类型 manager.responseSerializer = [AFJSONResponseSerializer serializer]; //申明请求的数据是json类型 manager.requestSerializer=[AFJSONRequestSerializer serializer]; //如果报接受类型不一致请替换一致text/html或别的 manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"]; //传入的参数 NSDictionary *parameters = @{@"1":@"XXXX",@"2":@"XXXX",@"3":@"XXXXX"}; //你的接口地址 NSString *url=@"http://xxxxx"; //发送请求 [manager POST:url parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"JSON: %@", responseObject); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error: %@", error); }];
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原文地址:http://www.cnblogs.com/LiLihongqiang/p/5786270.html