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TMImageFetcher.m
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TMImageFetcher.m
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//
// TMImageFetcher.m
//
// Created by Taylor McGann on 2/23/13.
// Copyright (c) 2013 Taylor McGann. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "TMImageFetcher.h"
@implementation TMImageFetcher
#pragma mark - Instance Methods
- (id)initWithRemoteURL:(NSURL *)remoteURL
{
self = [super init];
if (self) {
self.remoteURL = remoteURL;
}
return self;
}
- (void)downloadImage:(NSString *)imageName
{
self.activeDownload = [NSMutableData data];
self.imageName = imageName;
NSURL *url = [[NSURL alloc] initWithString:imageName relativeToURL:self.remoteURL];
// NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url cachePolicy:NSURLCacheStorageAllowed timeoutInterval:30.0];
// NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
// self.imageConnection = connection;
NSError *error;
NSData *imageData = [NSData dataWithContentsOfURL:url options:NSDataReadingMappedIfSafe error:&error];
if (error) {
NSLog(@"Error: %@", error);
} else {
[self.delegate saveImage:imageData withName:imageName];
}
}
- (void)cancelDownload
{
[self.imageConnection cancel];
self.imageConnection = nil;
self.activeDownload = nil;
}
#pragma mark - NSURLConnectionDelegate Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
if (self.debug) {
NSLog(@"[%@ %@] connection: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), connection);
NSLog(@"[%@ %@] didReceiveResponse: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), response);
}
// Do something?!
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
if (self.debug) {
NSLog(@"[%@ %@] connection: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), connection);
NSLog(@"[%@ %@] didReceiveData: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), data);
}
[self.activeDownload appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
if (self.debug) {
NSLog(@"[%@ %@] connection: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), connection);
NSLog(@"[%@ %@] didFailWithError: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), error);
}
// Clear the activeDownload property to allow later attempts
self.activeDownload = nil;
// Release the connection now that it's finished
self.imageConnection = nil;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
if (self.debug) NSLog(@"[%@ %@] connectionDidFinishLoading: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), connection);
// call our delegate and pass it the image data
[self.delegate saveImage:self.activeDownload withName:self.imageName];
// UIImage *image = [[UIImage alloc] initWithData:self.activeDownload];
// Clear the activeDownload property to allow later attempts
self.activeDownload = nil;
// Release the connection now that it's finished
self.imageConnection = nil;
}
@end