Facebook's SDK does not provide the delegate function to show the progress during uploading the data to Facebook, e.g. photo. Therefore, user has to create it by adding the following functions into FBRequest.h and FBRequest.m as well as your ViewController.
In FBRequest.h, add the below function under FBRequestDelegate protocol:
- (void)request:(FBRequest *)request didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite;
In FBRequest.m, add the below function:
- (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite
{
if ([_delegate respondsToSelector:@selector(request:didSendBodyData:totalBytesWritten:totalBytesExpectedToWrite:)]) {
[_delegate request:self didSendBodyData:bytesWritten totalBytesWritten:totalBytesWritten totalBytesExpectedToWrite:totalBytesExpectedToWrite];
} }
In your ViewController, add the below function to implement the delegate function:
- (void)request:(FBRequest *)request didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite {
NSLog(@"%d bytes out of %d sent.", totalBytesWritten, totalBytesExpectedToWrite); }
Right now, your ViewController can receive the feedback from FBRequest when the data is being uploaded to Facebook.
Wednesday, September 12, 2012
Wednesday, August 1, 2012
Public, Private, and Protected Instance Variables
Classes can set instance variables as private, protected, and public. You use the compiler directives @private, @protected, and @public to declare the visiblity of instance variable.
The public directive allows any class access to the public variables.
The private directive ensures private variables are only visible to the class which declares it.
The protected directive ensures protected variables are only visible to the declaring class and its descendants.
Thursday, July 5, 2012
Alternative way to replace UIGetScreenImage()
CGImageRef screen = UIGetScreenImage();
The above code is one line of code to capture the screen, but Apple does not open the above API UIGetScreenImage() for the public app. i.e. fail to upload to Apple for approval. So the alternative way to capture screen and save it are listed as below.
The above code is one line of code to capture the screen, but Apple does not open the above API UIGetScreenImage() for the public app. i.e. fail to upload to Apple for approval. So the alternative way to capture screen and save it are listed as below.
- (void)captureAndSaveImage
{
// Capture screen here... and cut the appropriate size for saving and uploading
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// crop the area you want
CGRect rect;
rect = CGRectMake(0, 10, 300, 300); // whatever you want
CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], rect);
UIImage *img = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
imageView.image = img; // show cropped image on the ImageView
}
// this is option to alert the image saving status
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
UIAlertView *alert;
// Unable to save the image
if (error)
alert = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Unable to save image to Photo Album."
delegate:self cancelButtonTitle:@"Dismiss"
otherButtonTitles:nil];
else // All is well
alert = [[UIAlertView alloc] initWithTitle:@"Success"
message:@"Image saved to Photo Album."
delegate:self cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
[alert show];
[alert release];
}
Tuesday, July 3, 2012
Base64 encode/decode method
//put it on the top of xxx.m
{
// encode method
// decode method
****************************************************
static char base64EncodingTable[64] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};
- (void)testBase64{
NSString *testStr = @"000000";
NSString *encodedStr = [self base64StringFromData:testStr];
NSLog(@"%@", encodedStr);
NSData *data = [self base64DataFromString:encodedStr];
NSString decodedStr = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"decoded string is %@ for %@", decodedStr, testStr);
}
// encode method
-(NSString *) base64StringFromData:(NSString *)str
{
NSData* data=[str dataUsingEncoding:NSUTF8StringEncoding];
int length = str.length;
unsigned long ixtext, lentext;
long ctremaining;
unsigned char input[3], output[4];
short i, charsonline = 0, ctcopy;
const unsigned char *raw;
NSMutableString *result;
lentext = [data length];
if (lentext < 1)
return @"";
result = [NSMutableString stringWithCapacity: lentext];
raw = [data bytes];
ixtext = 0;
while (true) {
ctremaining = lentext - ixtext;
if (ctremaining <= 0)
break;
for (i = 0; i < 3; i++) {
unsigned long ix = ixtext + i;
if (ix < lentext)
input[i] = raw[ix];
else
input[i] = 0;
}
output[0] = (input[0] & 0xFC) >> 2;
output[1] = ((input[0] & 0x03) << 4) | ((input[1] & 0xF0) >> 4);
output[2] = ((input[1] & 0x0F) << 2) | ((input[2] & 0xC0) >> 6);
output[3] = input[2] & 0x3F;
ctcopy = 4;
switch (ctremaining) {
case 1:
ctcopy = 2;
break;
case 2:
ctcopy = 3;
break;
}
for (i = 0; i < ctcopy; i++)
[result appendString: [NSString stringWithFormat: @"%c", base64EncodingTable[output[i]]]];
for (i = ctcopy; i < 4; i++)
[result appendString: @"="];
ixtext += 3;
charsonline += 4;
if ((length > 0) && (charsonline >= length))
charsonline = 0;
}
return result;
}
// decode method
- (NSData *)base64DataFromString: (NSString *)string
{
unsigned long ixtext, lentext;
unsigned char ch, inbuf[4], outbuf[3];
short i, ixinbuf;
Boolean flignore, flendtext = false;
const unsigned char *tempcstring;
NSMutableData *theData;
if (string == nil)
{
return [NSData data];
}
ixtext = 0;
tempcstring = (const unsigned char *)[string UTF8String];
lentext = [string length];
theData = [NSMutableData dataWithCapacity: lentext];
ixinbuf = 0;
while (true)
{
if (ixtext >= lentext)
{
break;
}
ch = tempcstring [ixtext++];
flignore = false;
if ((ch >= 'A') && (ch <= 'Z'))
{
ch = ch - 'A';
}
else if ((ch >= 'a') && (ch <= 'z'))
{
ch = ch - 'a' + 26;
}
else if ((ch >= '0') && (ch <= '9'))
{
ch = ch - '0' + 52;
}
else if (ch == '+')
{
ch = 62;
}
else if (ch == '=')
{
flendtext = true;
}
else if (ch == '/')
{
ch = 63;
}
else
{
flignore = true;
}
if (!flignore)
{
short ctcharsinbuf = 3;
Boolean flbreak = false;
if (flendtext)
{
if (ixinbuf == 0)
{
break;
}
if ((ixinbuf == 1) || (ixinbuf == 2))
{
ctcharsinbuf = 1;
}
else
{
ctcharsinbuf = 2;
}
ixinbuf = 3;
flbreak = true;
}
inbuf [ixinbuf++] = ch;
if (ixinbuf == 4)
{
ixinbuf = 0;
outbuf[0] = (inbuf[0] << 2) | ((inbuf[1] & 0x30) >> 4);
outbuf[1] = ((inbuf[1] & 0x0F) << 4) | ((inbuf[2] & 0x3C) >> 2);
outbuf[2] = ((inbuf[2] & 0x03) << 6) | (inbuf[3] & 0x3F);
for (i = 0; i < ctcharsinbuf; i++)
{
[theData appendBytes: &outbuf[i] length: 1];
}
}
if (flbreak)
{
break;
}
}
}
return theData;
}
****************************************************
Output in console:
Decoded string is MDAwMDAw for testStr 000000;
Tuesday, June 26, 2012
php: get input and write text file, then return
Put the following codes in the server side to receive the inputs from Apps.
<?php
<?php
// assign the input to the variables
$method = $_POST['method'];
$name = $_POST['name']; // variable to be received by server
$id = $_POST['userID']; // variable to be received by server
$id = $_POST['userID']; // variable to be received by server
echo " user name: ".$name ." id: ". $id. " method: ". $method; // echo the received data to the Apps
// write text file with above two variables
$file = "file.txt";
$fh = fopen( $file, 'w' );
$carriageReturn = "\n";
fwrite( $fh, $method );
fwrite( $fh, $carriageReturn );
fwrite( $fh, $name );
fwrite( $fh, $carriageReturn );
fwrite( $fh, $id );
fclose( $fh );
?>
php: return data in json
In server side, the following code can return the data in JSON format to client(Apps).
<?php
<?php
$name = "Ben";
$id = "id1234";
$method = "get data";
// build result in json format
$arr = array("result" => "success",
"uid" => $id,
"data"=>array("name"=>$name,
"id"=>$id,
"method"=>$method
)
);
echo json_encode($arr);
?>
php: generates Token with random string
The following code generate the random string with certain length to the client. It can be used to create the token and send to client's apps.
<?php
<?php
// generate random string
function random_gen($length)
{
$random= "";
srand((double)microtime()*1000000);
$char_list = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$char_list .= "abcdefghijklmnopqrstuvwxyz";
$char_list .= "1234567890";
// Add the special characters to $char_list if needed
for($i = 0; $i < $length; $i++)
{
$random .= substr($char_list,(rand()%(strlen($char_list))), 1);
}
return $random;
}
$random_string = random_gen(30); //This will return a random 30 character string
echo "New Token: ".$random_string;
?>
Monday, June 25, 2012
Distribute beta App over the air
Now it is not necessary to send ipa file and distribution profile to beta tester for Apps testing. There is a distribution OTA method, the apps can be uploaded to server and let tester to install it from server.
1. to create a provisioning distribution profile for Ad Hoc build with the selected iDevices (devices' UDID are registered in the portal).
2. in Xcode, associate this provisioning distribution profile with your build. In the Code Signing section choose the new Provisioning Profile.
3. Build and Archive.
4. Click on the Share button, and choose Distribute for Enterprise – fill in the URL to the location where you plan to host the application.
5. Upload ipa, plist and icon files to the server you typed in step 4.
6. Build the HTML to let iDevice to access and install the app.
1. to create a provisioning distribution profile for Ad Hoc build with the selected iDevices (devices' UDID are registered in the portal).
2. in Xcode, associate this provisioning distribution profile with your build. In the Code Signing section choose the new Provisioning Profile.
3. Build and Archive.
4. Click on the Share button, and choose Distribute for Enterprise – fill in the URL to the location where you plan to host the application.
5. Upload ipa, plist and icon files to the server you typed in step 4.
6. Build the HTML to let iDevice to access and install the app.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>OTA Test App</title>
</head>
<body>
<br><font size = "20">You are invited to test new app.</font></br>
<br><<font size="15"><a href="itms-services://?action=download-manifest&url=http://www.yourwebsite.com">Tap Here to Install the Application</a></font>
</br>
</body> </html>
You may refer to the below link.
http://mobiledevelopertips.com/xcode/distribute-ad-hoc-applications-over-the-air-ota.html
You may refer to the below link.
http://mobiledevelopertips.com/xcode/distribute-ad-hoc-applications-over-the-air-ota.html
Monday, June 18, 2012
No previous prototype for function
How to handle the Xcode warning “no previous prototype for function…”?
Optionally, you can also do this to the specific target(s) in question.
Sunday, June 17, 2012
Label with dynamic height
The below code creates the dynamic height to fit for the inputed text
-(void)createDynamicHeight
{
-(void)createDynamicHeight
{
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, 300, 40)];
label.backgroundColor = [UIColor blackColor];
[self.view addSubview:label];
NSString *text = @"This is label with dynamic height";
label.text = text;
label.lineBreakMode = UILineBreakModeWordWrap;
// resize the height to fit the content
CGSize newLabelSize = [text sizeWithFont:label.font
constrainedToSize:label.frame.size
lineBreakMode:UILineBreakModeWordWrap];
CGRect newFrame = instructions.frame;
if (newLabelSize.height > 40) {
newFrame.size.height = newLabelSize.height;
} else {
newFrame.size.height = 40
}
label.frame = newFrame;
label.numberOfLines = 0;
NSLog(@"Label height is %f", label.frame.size.height);
}
Thursday, June 14, 2012
Error: more than max 5 filtered album trying to register, this will fail
Per the subject, the following code may help to solve it.
I tried in my project, it seems work.
I tried in my project, it seems work.
- (void)viewDidAppear:(BOOL)animated{ [super viewDidAppear:animated]; [self setModalInPopover:YES];}
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