Custom UIActivityIndicatorView

@class UIProgressView;
@protocol UIDownloadActivityIndicatorDelegate;

@interface UIDownloadActivityIndicator : UIActivityIndicatorView {
NSURLRequest * DownloadRequest;
NSURLConnection * DownloadConnection;
NSMutableData * receivedData;
NSString * localFilename;
id < UIDownloadActivityIndicatorDelegate > delegate ;
long long bytesReceived;
long long expectedBytes;

float percentComplete;
}

- (UIDownloadActivityIndicator * )initWithURL:(NSURL * )fileURL withActivityIndicatorStyle:(UIActivityIndicatorViewStyle)style timeout:(NSInteger)timeout delegate :(id < UIDownloadActivityIndicatorDelegate > )theDelegate;
- ( void ) setURL:(NSURL * )fileURL timeout:(NSInteger)timeout;


@property (nonatomic, readonly ) NSMutableData * receivedData;
@property (nonatomic, readonly , retain) NSURLRequest * DownloadRequest;
@property (nonatomic, readonly , retain) NSURLConnection * DownloadConnection;
@property (nonatomic, assign) id < UIDownloadActivityIndicatorDelegate > delegate ;

@property (nonatomic, readonly ) float percentComplete;

@end

@protocol UIDownloadActivityIndicatorDelegate < NSObject >

@optional
- ( void )downloadBar:(UIDownloadActivityIndicator * )downloadBar didFinishWithData:(NSData * )fileData suggestedFilename:(NSString * )filename;
- ( void )downloadBar:(UIDownloadActivityIndicator * )downloadBar didFailWithError:(NSError * )error;
- ( void )downloadBarUpdated:(UIDownloadActivityIndicator * )downloadBar;

@end

 

UIDownloadActivityIndicator.h

 

#import " UIDownloadActivityIndicator.h "

@implementation UIDownloadActivityIndicator

@synthesize DownloadRequest,
DownloadConnection,
receivedData,
delegate ,
percentComplete;


- (UIDownloadActivityIndicator * )initWithURL:(NSURL * )fileURL withActivityIndicatorStyle:(UIActivityIndicatorViewStyle)style timeout:(NSInteger)timeout delegate :(id < UIDownloadActivityIndicatorDelegate > )theDelegate {
self = [super initWithActivityIndicatorStyle:style];
if (self) {
self. delegate = theDelegate;
bytesReceived = percentComplete = 0 ;
localFilename = [[[fileURL absoluteString] lastPathComponent] copy];
receivedData = [[NSMutableData alloc] initWithLength: 0 ];
// self.progress = 0.0;
[self startAnimating];
self.backgroundColor = [UIColor clearColor];
DownloadRequest = [[NSURLRequest alloc] initWithURL:fileURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:timeout];
DownloadConnection = [[NSURLConnection alloc] initWithRequest:DownloadRequest delegate :self startImmediately:YES];

if (DownloadConnection == nil) {
[self. delegate downloadBar:self
didFailWithError:[NSError errorWithDomain: @" UIDownloadBar Error "
code: 1
userInfo:[NSDictionary
dictionaryWithObjectsAndKeys: @" NSURLConnection Failed " ,
NSLocalizedDescriptionKey, nil]]];
}
}

return self;
}

- ( void ) setURL:(NSURL * )fileURL timeout:(NSInteger)timeout {
[receivedData release];
[DownloadRequest release];


bytesReceived = percentComplete = 0 ;
localFilename = [[[fileURL absoluteString] lastPathComponent] copy];

receivedData = [[NSMutableData alloc] initWithLength: 0 ];

DownloadRequest = [[NSURLRequest alloc] initWithURL:fileURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:timeout];
DownloadConnection = [[NSURLConnection alloc] initWithRequest:DownloadRequest delegate :self startImmediately:YES];

if (DownloadConnection == nil) {
[self. delegate downloadBar:self
didFailWithError:[NSError errorWithDomain: @" UIDownloadBar Error "
code: 1
userInfo:[NSDictionary
dictionaryWithObjectsAndKeys: @" NSURLConnection Failed " ,
NSLocalizedDescriptionKey, nil]]];
}
}


- ( void )connection:(NSURLConnection * )connection didReceiveData:(NSData * )data {
[self.receivedData appendData:data];

NSInteger receivedLen = [data length];
bytesReceived = (bytesReceived + receivedLen);

if (expectedBytes != NSURLResponseUnknownLength) {
// self.progress = ((bytesReceived/(float)expectedBytes)*100)/100;
// percentComplete = self.progress*100;
}

[ delegate downloadBarUpdated:self];
}

- ( void )connection:(NSURLConnection * )connection didFailWithError:(NSError * )error {
[self. delegate downloadBar:self didFailWithError:error];
[connection release];
connection = nil;
}

- ( void )connection:(NSURLConnection * )connection didReceiveResponse:(NSURLResponse * )response {
expectedBytes = [response expectedContentLength];
}

- ( void )connectionDidFinishLoading:(NSURLConnection * )connection {
[self. delegate downloadBar:self didFinishWithData:self.receivedData suggestedFilename:localFilename];
[connection release];
connection = nil;
}

- ( void )drawRect:(CGRect)rect {
[super drawRect:rect];
}

- ( void )dealloc {
[localFilename release];
[receivedData release];
[DownloadRequest release];
if (DownloadConnection != nil ) {
[DownloadConnection release];
DownloadConnection = nil;
}
[super dealloc];
}

@end