ios 调用javascript ios 调用自带浏览器

我们在程序中或多或少都会使用到手机的一些应用程序,比如电话,短信,浏览器,相机,相册等,那么我们该如何调用这些系统自带的应用程序呢?下面我一一说来.

调用电话、浏览器

---

对于调用电话和浏览器比较简单,使用UIApplication调用openURL方法.

调用系统电话

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://10086"]];

调用系统safari浏览器

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.coder-dong.com"]];

调用短信功能

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调用系统的短信功能, 同样使用UIApplication调用openURL方法. 我们只能openURL的方法中只能设定号码,不能做内容太上的更改.那么我们就需要导入我们的MessageUI.framework库,然后导入头文件MFMessageComposeViewController.h,并实现代理方法.

导入MFMessageComposeViewController头文件

#import <MessageUI/MFMessageComposeViewController.h>

实现自定义方法并设置代理

- (IBAction)SMSAction:(id)sender {
    
   [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://10086"]];
    
    [self sendSMS:@"我想咨询一下话费余额是不是一百万." recipientList:@[@"10086客服"]];
    
}


- (void)sendSMS:(NSString *)bodyOfMessage recipientList:(NSArray *)recipients{
    
    MFMessageComposeViewController *controller = [[MFMessageComposeViewController alloc] init];
 
    if([MFMessageComposeViewController canSendText]){
        
        controller.body = bodyOfMessage;
        
        controller.recipients = recipients;
    
        controller.messageComposeDelegate = self;
        
        [self showDetailViewController:controller sender:nil];
        
    }   
    
}

当完成消息的发送之后,我们就需要调用我们的代理方法,给用户反馈信息

//代理方法的实现
-(void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result{
    
    if (result == MessageComposeResultCancelled){
        NSLog(@"取消发送消息");
    } else if (result == MessageComposeResultSent){
        NSLog(@"消息已经发送");
    }else{
        
        NSLog(@"消息发送失败");
    }

}

调用相机、相册

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调用相机、相册我们需要使用到UIImagePickerController这个类,所以我们需要首先导入这个类

#import <UIKit/UIImagePickerController.h>

然后我们在点击方法中实现调用相机,当然了,调用的时候,我们要先判断设备是否存在摄像头.

//设置调用类型为相机
    UIImagePickerControllerSourceType  sourceType = UIImagePickerControllerSourceTypeCamera;
    
        if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
        
            NSLog(@"本设备未发现摄像头!");
            
            return;
        
        }
    
    UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];
    
    pickerController.sourceType = sourceType;
    
    pickerController.delegate = self;
    
    pickerController.allowsEditing = YES;//设置是否可以进行编辑
    

    [self showDetailViewController:pickerController sender:nil];

调用系统相册,调用系统相册的时候,跟调用相机的时候十分相似.

//设置调用类型为相册.
    UIImagePickerControllerSourceType  sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    
    UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];
    
    pickerController.sourceType = sourceType;
    
    pickerController.delegate = self;
    
    pickerController.allowsEditing = YES;
    
    [self showDetailViewController:pickerController sender:nil];

我们调用系统相册和相机最终的目的是为了获得系统中的图片资源.所以我们需要实现代理方法,获取到我们的图片.

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{

    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
    
    //当选择的类型是图片
    if ([type isEqualToString:@"public.image"])
    {
        //先把图片转成NSData
        UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
        NSData *data;
        if (UIImagePNGRepresentation(image) == nil)
        {
            data = UIImageJPEGRepresentation(image, 1.0);
        }
        else
        {
            data = UIImagePNGRepresentation(image);
        }
        
        //图片保存的路径
        //这里将图片放在沙盒的documents文件夹中
        NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
        
        //文件管理器
        NSFileManager *fileManager = [NSFileManager defaultManager];
        
        //把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png
        [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
        [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];
        
        //得到选择后沙盒中图片的完整路径
       NSString * filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];
        
        NSLog(@"%@",filePath);
        
        //关闭相册界面
        [picker dismissModalViewControllerAnimated:YES];
        
        //创建一个选择后图片的小图标放在下方
        //类似微薄选择图后的效果
        UIImageView *smallimage = [[UIImageView alloc] initWithFrame:
                                    CGRectMake(50, 120, 40, 40)] ;
        
        smallimage.image = image;
        //加在视图中
        [self.view addSubview:smallimage];
        
    }

}