File and folder Problems

IOS obtains the Document folder path

NSFileManager * fileManager = [NSFileManager defaultManager];

NSArray * paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES );

NSString * documentsDirectory = [paths objectAtIndex: 0];

NSString * filePath2 = [documentsDirectory stringByAppendingPathComponent: @ "Screenshot.png"];

IOS camera retrieval and photo taking
<UIImagePickerControllerDelegate>

1. Open the camera

-(IBAction) Open :( id) sender {

UIImagePickerController * picker = [[UIImagePickerController alloc] init];

If ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {

Picker. sourceType = UIImagePickerControllerSourceTypeCamera;

NSArray * temp_MediaTypes = [UIImagePickerControlleravailableMediaTypesForSourceType: picker. sourceType];

Picker. mediaTypes = temp_MediaTypes;

Picker. delegate = self;

Picker. allowsImageEditing = YES;

}

[Self presentModalViewController: picker animated: YES];

[Picker release];

}

2. Photo callback

-(Void) imagePickerController :( UIImagePickerController *) picker didFinishPickingMediaWithInfo :( NSDictionary *) info

{

NSString * mediaType = [info objectForKey: UIImagePickerControllerMediaType];

BOOL success;

NSFileManager * fileManager = [NSFileManager defaultManager];

NSError * error;

NSArray * paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES );

NSString * documentsDirectory = [paths objectAtIndex: 0];

If ([mediaType isw.tostring: @ "public. image"]) {

UIImage * image = [info objectForKey: @ "UIImagePickerControllerEditedImage"];

NSLog (@ "found an image ");

NSString * imageFile = [documentsDirectory stringByAppendingPathComponent: @ "temp.jpg"];

NSLog (@ "% @", imageFile );

Success = [fileManager fileExistsAtPath: imageFile];

If (success ){

Success = [fileManager removeItemAtPath: imageFile error: & error];

}

ImageView. image = image;

[UIImageJPEGRepresentation (image, 1.0f) writeToFile: imageFile atomically: YES];

// SETIMAGE (image );

// CFShow ([[NSFileManager defaultManager] directoryContentsAtPath: [NSHomeDirectory () stringByAppendingString: @ "/Documents"]);

}

Else if ([mediaType isw.tostring: @ "public. movie"]) {

NSURL * videoURL = [info objectForKey: UIImagePickerControllerMediaURL];

NSLog (@ "% @", videoURL );

NSLog (@ "found a video ");

NSData * videoData = [NSData dataWithContentsOfURL: videoURL];

NSString * videoFile = [documentsDirectory stringByAppendingPathComponent: @ "temp. mov"];

NSLog (@ "% @", videoFile );

Success = [fileManager fileExistsAtPath: videoFile];

If (success ){

Success = [fileManager removeItemAtPath: videoFile error: & error];

}

[VideoData writeToFile: videoFile atomically: YES];

// CFShow ([[NSFileManager defaultManager] directoryContentsAtPath: [NSHomeDirectory () stringByAppendingString: @ "/Documents"]);

// NSLog (videoURL );

}

[Picker dismissModalViewControllerAnimated: YES];

}

-(Void) imagePickerControllerDidCancel :( UIImagePickerController *) picker {

[Picker dismissModalViewControllerAnimated: YES];

}

IOS File Download (synchronous download)

NSString * urlAsString = @ "http://files.cnblogs.com/zhuqil/UIWebViewDemo.zip ";

NSURL * url = [NSURL URLWithString: urlAsString];

NSURLRequest * request = [NSURLRequest requestWithURL: url];

NSError * error = nil;

NSData * data = [NSURLConnection sendSynchronousRequest: request returningResponse: nilerror: & error];

/* Downloaded data */

If (data! = Nil ){

NSLog (@ "Download successful ");

If ([data writeToFile: @ "/Users/jilucky/UIWebViewDemo.zip" atomically: YES]) {

NSLog (@ "saved successfully .");

}

Else

{

NSLog (@ "failed to save .");

}

} Else {

NSLog (@ "% @", error );

}

IOS vibration effect
AudioToolBox. framework

# Import "AudioToolbox/AudioToolbox. h"
AudioServicesPlaySystemSound (kSystemSoundID_Vibrate );

Get the device number for IOS

UIDevice * device = [UIDevice currentDevice]; // create a device object

NSString * deviceUID = [[NSString alloc] initWithString: [device uniqueIdentifier];

UIAlertView * view = [[UIAlertView alloc] initWithTitle: nil message: deviceUID delegate: selfcancelButtonTitle: @ "OK" otherButtonTitles: nil];

[View show];

Unity 3D screenshot

1. js script (added to ARCamera)

# Pragma strict

Function Start (){}

Function Update (){}

Function ScreenImage (){

Application. CaptureScreenshot ("Screenshot.png ");

}

2. Add button

UIButton * button1 = [UIButton buttonWithType: UIButtonTypeRoundedRect];

[Button1 setFrame: CGRectMake (0, 0, 30, 30)];

[Button1 addTarget: self action: @ selector (ScreenImage) forControlEvents: UIControlEventTouchUpInside];

[Self. view addSubview: button1];

 

3. Response Functions

-(Void) ScreenImage {

/// Retrieve the Script Function

UnitySendMessage ("ARCamera", "ScreenImage ","");

// Save to album

NSFileManager * fileManager = [NSFileManager defaultManager];

NSArray * paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES );

NSString * documentsDirectory = [paths objectAtIndex: 0];

NSString * filePath2 = [documentsDirectory stringByAppendingPathComponent: @ "Screenshot.png"];

UIImage * image = [UIImage imageWithContentsOfFile: filePath2];

UIImageWriteToSavedPhotosAlbum (image, nil); // save

}

Four methods for obtaining file paths for IPhone
1. Path in document is the most troublesome one:

NSArray * paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES );

NSString * documentsDirectory = [paths objectAtIndex: 0];

NSString * writableDBPath = [documentsDirectory stringByAppendingPathComponent: filename;

 

Self-built macros

2, # define ABS_FILE_PATH (FILE_NAME) [NSString stringWithFormat: @ "% @/Documents/% @", NSHomeDirectory (), FILE_NAME]

 

 

3. Obtain the file path under the application package directory:

# Define PACKAGE_FILE_PATH (FILE_NAME) [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent: FILE_NAME]

 

4, NSString * filePath = [[NSBundle mainBundle] pathForResource: @ "fileName" ofType: @ "filetype(txt..html ..)"];

 

IOS screenshot
First: capture the entire Screen

Written in ViewController. This class is a view controller.

-(Void) loadView {

// Static sharedApplication
[[UIApplication sharedApplication] setStatusBarHidden: YES // hide the status bar
WithAnimation: UIStatusBarAnimationSlide];
UIImage * mage = [UIImage imageNamed: @ "image.png"];
UIImageView * imageView = [[UIImageView alloc] initWithFrame: [UIScreen mainScreen] applicationFrame];

// UIImageView * im = [UIImageView alloc] initWithImage: mage];
[ImageView setImage: mage];

Self. view = [[UIView alloc] initWithFrame: [UIScreen mainScreen] applicationFrame];
[Self. view addSubview: contentView];
CGRect rect = CGRectMake (0, 0,320,480 );
UIGraphicsBeginImageContext (rect. size );
CGContextRef currentContext = UIGraphicsGetCurrentContext ();
CGContextClipToRect (currentContext, rect );
CGContextDrawImage (currentContext, rect, mage. CGImage );
UIImage * image = UIGraphicsGetImageFromCurrentImageContext ();
UIGraphicsEndImageContext ();
ContentView. image = image;
Self. view = [[UIView alloc] initWithFrame: [UIScreen mainScreen] applicationFrame];
[Self. view addSubview: contentView];
[Image release];

}
Type 2: scaling down the entire image

-(Void) loadView {
[[UIApplication sharedApplication] setStatusBarHidden: YES withAnimation: UIStatusBarAnimationSlide];
UIImage * image = [UIImage imageNamed: @ "image.png"];
// UIImageView * contentView = [[UIImageView alloc] initWithFrame: [UIScreen mainScreen] applicationFrame];

// Used to control the scale of an image
CGRect rect = CGRectMake (0, 0,160,240 );
UIGraphicsBeginImageContext (rect. size );
CGContextRef currentContent = UIGraphicsGetCurrentContext ();
CGContextClipToRect (currentContent, rect );
[Image drawInRect: rect];
UIImage * image = UIGraphicsGetImageFromCurrentImageContext ();
UIGraphicsEndImageContext ();
UIImageView * contentView = [[UIImageView alloc] initWithFrame: rect];
ContentView. image = image;
Self. view = [[UIView alloc] initWithFrame: [UIScreen mainScreen] applicationFrame];
[Self. view addSubview: contentView];

[Image release];
}

Level 3: truly captured images

-(Void) loadView {
 
[[UIApplication sharedApplication] setStatusBarHidden: YES withAnimation: UIStatusBarAnimationSlide];
UIImage * image = [UIImage imageNamed: @ "image2.png"];

CGRect rect = CGRectMake (33, 22,140,353); // create a rectangle
CGRect re = CGRectMake (0, 0,140,140 );
UIImageView * contentView = [[UIImageView alloc] initWithFrame: re];
ContentView. image = [UIImage imageWithCGImage: CGImageCreateWithImageInRect ([image CGImage], rect)];

Self. view = [[UIView alloc] initWithFrame: CGRectMake (0, 0,320,480)];
ImageView * imageView = [[ImageView alloc] initWithFrame: CGRectMake (0, 0,320,480)];
Self. view. backgroundColor = [UIColor yellowColor];
[Self. view addSubview: imageView];
[Self. view addSubview: contentView];

[Image release];
}

* ***************************** The following is a simple Demo for writing ** ****************************

# Import <UIKit/UIKit. h>

@ Interface imageView: UIView {
CGPoint starPoint;
CGPoint endPoint;
UIImage * image;

}

@ End

# Import "imageView. h"

@ Implementation imageView

-(Void) dealloc {

[Super dealloc];
}
-(Id) initWithFrame :( CGRect) frame
{
Self = [super initWithFrame: frame];
If (self ){
AllMovePoints = [[NSMutableArray alloc] init];
// Self. frame = CGRectMake (0, 0,220,340 );
Self. frame = CGRectMake (0, 0,320,480 );
Image = [UIImage imageNamed: @ "image.png"];
Self. backgroundColor = [UIColor colorWithPatternImage: image];
// UIImageView * imageView = [[UIImageView alloc] initWithImage: image];
// ImageView. tag = 3;
// ImageView. frame = CGRectMake (0, 0,320,360 );
// [Self addSubview: imageView];

// Initialization code
}
Return self;
}
-(Void) drawRect :( CGRect) rect {
CGContextRef context = UIGraphicsGetCurrentContext ();
CGContextSetRGBStrokeColor (context, 1, 5.0, 1.0, 1.0 );
CGContextSetLineWidth (context, 2.0 );
CGContextAddRect (context, CGRectMake (starPoint. x, starPoint. y, endPoint. x-starPoint.x, endPoint. y-starPoint.y ));
CGContextStrokePath (context );

}
-(Void) touchesBegan :( NSSet *) touches withEvent :( UIEvent *) event {
UITouch * t = [touches anyObject];
StarPoint = [t locationInView: self];

}
-(Void) touchesMoved :( NSSet *) touches withEvent :( UIEvent *) event {
UITouch * t = [touches anyObject];
// CGPoint p = [t locationInView: self];
EndPoint = [t locationInView: self];
UIImageView * image11 = (UIImageView *) [self viewWithTag: 3];
[Image11 removeFromSuperview];
// [AllMovePoints addObject: NSStringFromCGPoint (p)];
[Self setNeedsDisplay];

}
-(Void) touchesEnded :( NSSet *) touches withEvent :( UIEvent *) event {
CGRect rect1 = CGRectMake (starPoint. x, starPoint. y, endPoint. x-starPoint.x, endPoint. y-starPoint.y); // create a Rectangular Box
CGRect re = CGRectMake (320-endPoint.x + starPoint. x, 480-endPoint.y + starPoint. y, endPoint. x-starPoint.x, endPoint. y-starPoint.y );
UIImageView * contentView = [[UIImageView alloc] initWithFrame: re];
ContentView. tag = 3;
ContentView. image = [UIImage imageWithCGImage: CGImageCreateWithImageInRect ([image CGImage], rect1)];
[Self addSubview: contentView];
}

@ End