из этого кода
#import "AsyncImageView.h"
#import "ImageCache.h"
#import "ImageCacheObject.h"
static ImageCache *imageCache = nil;
@implementation AsyncImageView
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
}
return self;
}
- (void)drawRect:(CGRect)rect {
// Drawing code
}
- (void)dealloc {
[connection cancel];
[connection release];
[data release];
[super dealloc];
}
-(void)loadImageFromURL:(NSURL*)url {
if (connection != nil) {
[connection cancel];
[connection release];
connection = nil;
}
if (data != nil) {
[data release];
data = nil;
}
if (imageCache == nil)
imageCache = [[ImageCache alloc] initWithMaxSize:2*1024*1024];
[urlString release];
urlString = [[url absoluteString] copy];
UIImage *cachedImage = [imageCache imageForKey:urlString];
if (cachedImage != nil)
{ NSLog(@"get in");
if ([[self subviews] count] > 0)
{
[[[self subviews] objectAtIndex:0] removeFromSuperview];
}
UIImageView *imageView = [[[UIImageView alloc] initWithImage:cachedImage] autorelease];
imageView.contentMode = UIViewContentModeScaleAspectFit;
imageView.autoresizingMask =
UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[self addSubview:imageView];
imageView.frame = self.bounds;
[imageView setNeedsLayout];
[self setNeedsLayout];
return;
}
#define SPINNY_TAG 5555
UIActivityIndicatorView *spinny = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
spinny.tag = SPINNY_TAG;
spinny.center = self.center;
[spinny startAnimating];
[self addSubview:spinny];
[spinny release];
NSURLRequest *request = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection
didReceiveData:(NSData *)incrementalData {
if (data==nil) {
data = [[NSMutableData alloc] initWithCapacity:2048];
}
[data appendData:incrementalData];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)aConnection {
[connection release];
connection = nil;
UIView *spinny = [self viewWithTag:SPINNY_TAG];
[spinny removeFromSuperview];
if ([[self subviews] count] > 0) {
[[[self subviews] objectAtIndex:0] removeFromSuperview];
}
UIImage *image = [UIImage imageWithData:data];
[imageCache insertImage:image withSize:[data length] forKey:urlString];
UIImageView *imageView = [[[UIImageView alloc]
initWithImage:image] autorelease];
imageView.contentMode = UIViewContentModeScaleAspectFit;
imageView.autoresizingMask =
UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[self addSubview:imageView];
imageView.frame = self.bounds;
[imageView setNeedsLayout]; // is this necessary if superview gets setNeedsLayout?
[self setNeedsLayout];
[data release];
data = nil;
}
@end
Если я хочу получить изображение из исходного кода приложения, если URL-адрес пуст, какой код я должен добавить ??
и вот еще код от xyz.m
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [self.newsTable dequeueReusableCellWithIdentifier:
CellIdentifier];
if (cell == nil) {
//cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell = [self getCellContentView:CellIdentifier];
}
else{
AsyncImageView *oldImage = (AsyncImageView *)[cell.contentView viewWithTag:999];
[oldImage removeFromSuperview];
}
int index = [indexPath indexAtPosition: [indexPath length] - 1];
//Get Picture
CGRect frame;
frame.size.width=50; frame.size.height=50;
frame.origin.x=10; frame.origin.y=0;
AsyncImageView* asyncImage = [[[AsyncImageView alloc] initWithFrame:frame] autorelease];
asyncImage.tag = 999;
NSString *string = [jsonPic objectAtIndex:index];
NSString *url=[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSURL *imageURL = [NSURL URLWithString:url];
if([string isEqualToString:@""]){
NSLog(@"Not found");
здесь я не знаю Как я могу получить изображение из источника
AsyncImageView * NoImage = [[[AsyncImageView alloc] initWithFrame:frame] autorelease];
NoImage.tag = 999;
NoImage.image = [UIImage imageNamed:@"bl-noImg.gif"];
[cell.contentView addSubview:NoImage];
}
else
{ NSLog(@"image URL %@",imageURL);
[asyncImage loadImageFromURL:imageURL];
[cell.contentView addSubview:asyncImage];
Я могу получить изображение из asyncImage
Пожалуйста, помогите мне или помогитемне сделать это.благодарю вас .,,,Теперь все готово, и вот мой код результата
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [self.newsTable dequeueReusableCellWithIdentifier:
CellIdentifier];
if (cell == nil) {
//cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell = [self getCellContentView:CellIdentifier];
}
else{
AsyncImageView *oldImage = (AsyncImageView *)[cell.contentView viewWithTag:999];
[oldImage removeFromSuperview];
}
int index = [indexPath indexAtPosition: [indexPath length] - 1];
//Get Picture
CGRect frame;
frame.size.width=50; frame.size.height=50;
frame.origin.x=10; frame.origin.y=0;
AsyncImageView* asyncImage = [[[AsyncImageView alloc] initWithFrame:frame] autorelease];
asyncImage.tag = 999;
NSString *string = [jsonPic objectAtIndex:index];
if([string isEqualToString:@""]){
//NSLog(@"Not found");
UIImageView * NoImg = [[[UIImageView alloc] initWithFrame:frame] autorelease];
NoImg.tag = 999;
[NoImg setImage:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"bg-noImg" ofType:@"gif"]]];
[cell.contentView addSubview:NoImg];
}
else
{ //NSLog(@"image URL %@",imageURL);
NSString *url=[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSURL *imageURL = [NSURL URLWithString:url];
[asyncImage loadImageFromURL:imageURL];
[cell.contentView addSubview:asyncImage];
}
спасибо всем:)