我們在程序中或多或少都會使用到手機(jī)的一些應(yīng)用程序,比如電話,短信,瀏覽器,相機(jī),相冊等,那么我們該如何調(diào)用這些系統(tǒng)自帶的應(yīng)用程序呢?下面我一一說來.

調(diào)用電話、瀏覽器

對于調(diào)用電話和瀏覽器比較簡單,使用UIApplication調(diào)用openURL方法.

調(diào)用系統(tǒng)電話

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

調(diào)用系統(tǒng)safari瀏覽器

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

調(diào)用短信功能

調(diào)用系統(tǒng)的短信功能, 同樣使用UIApplication調(diào)用openURL方法. 我們只能openURL的方法中只能設(shè)定號碼,不能做內(nèi)容太上的更改.那么我們就需要導(dǎo)入我們的MessageUI.framework庫,然后導(dǎo)入頭文件MFMessageComposeViewController.h,并實現(xiàn)代理方法.

導(dǎo)入MFMessageComposeViewController頭文件

#import <MessageUI/MFMessageComposeViewController.h>

實現(xiàn)自定義方法并設(shè)置代理

- (IBAction)SMSAction:(id)sender {
    
   [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://10086"]];
    
    [self sendSMS:@"我想咨詢一下話費余額是不是一百萬." 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];
        
    }   
    
}

當(dāng)完成消息的發(fā)送之后,我們就需要調(diào)用我們的代理方法,給用戶反饋信息

//代理方法的實現(xiàn)
-(void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result{
    
    if (result == MessageComposeResultCancelled){
        NSLog(@"取消發(fā)送消息");
    } else if (result == MessageComposeResultSent){
        NSLog(@"消息已經(jīng)發(fā)送");
    }else{
        
        NSLog(@"消息發(fā)送失敗");
    }

}

調(diào)用相機(jī)、相冊

調(diào)用相機(jī)、相冊我們需要使用到UIImagePickerController這個類,所以我們需要首先導(dǎo)入這個類

#import <UIKit/UIImagePickerController.h>

然后我們在點擊方法中實現(xiàn)調(diào)用相機(jī),當(dāng)然了,調(diào)用的時候,我們要先判斷設(shè)備是否存在攝像頭.

 //設(shè)置調(diào)用類型為相機(jī)
    UIImagePickerControllerSourceType  sourceType = UIImagePickerControllerSourceTypeCamera;
    
        if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
        
            NSLog(@"本設(shè)備未發(fā)現(xiàn)攝像頭!");
            
            return;
        
        }
    
    UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];
    
    pickerController.sourceType = sourceType;
    
    pickerController.delegate = self;
    
    pickerController.allowsEditing = YES;//設(shè)置是否可以進(jìn)行編輯
    

    [self showDetailViewController:pickerController sender:nil];

調(diào)用系統(tǒng)相冊,調(diào)用系統(tǒng)相冊的時候,跟調(diào)用相機(jī)的時候十分相似.

//設(shè)置調(diào)用類型為相冊.
    UIImagePickerControllerSourceType  sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    
    UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];
    
    pickerController.sourceType = sourceType;
    
    pickerController.delegate = self;
    
    pickerController.allowsEditing = YES;
    
    [self showDetailViewController:pickerController sender:nil];

我們調(diào)用系統(tǒng)相冊和相機(jī)最終的目的是為了獲得系統(tǒng)中的圖片資源.所以我們需要實現(xiàn)代理方法,獲取到我們的圖片.

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

    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
    
    //當(dāng)選擇的類型是圖片
    if ([type isEqualToString:@"public.image"])
    {
        //先把圖片轉(zhuǎn)成NSData
        UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
        NSData *data;
        if (UIImagePNGRepresentation(image) == nil)
        {
            data = UIImageJPEGRepresentation(image, 1.0);
        }
        else
        {
            data = UIImagePNGRepresentation(image);
        }
        
        //圖片保存的路徑
        //這里將圖片放在沙盒的documents文件夾中
        NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
        
        //文件管理器
        NSFileManager *fileManager = [NSFileManager defaultManager];
        
        //把剛剛圖片轉(zhuǎn)換的data對象拷貝至沙盒中 并保存為image.png
        [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
        [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];
        
        //得到選擇后沙盒中圖片的完整路徑
       NSString * filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];
        
        NSLog(@"%@",filePath);
        
        //關(guān)閉相冊界面
        [picker dismissModalViewControllerAnimated:YES];
        
        //創(chuàng)建一個選擇后圖片的小圖標(biāo)放在下方
        //類似微薄選擇圖后的效果
        UIImageView *smallimage = [[UIImageView alloc] initWithFrame:
                                    CGRectMake(50, 120, 40, 40)] ;
        
        smallimage.image = image;
        //加在視圖中
        [self.view addSubview:smallimage];
        
    }

}

整體上看 ,調(diào)用系統(tǒng)的一些應(yīng)用還是很簡單的,希望這篇調(diào)用大亂斗能對大家有所幫助.??

--->參考博客鏈接.