AsynchImage.h
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
@interface AsynchImage : UIView{
NSURLConnection* connection;
NSMutableData* data;
UIImageView* imageView;
}
-(void)loadImageFromURL:(NSURL*)url;
-(void)loadExistingImage:(UIImage *)image;
@end
AsynchImage.m
#import "AsynchImage.h"
#define ACTIVITY_FRAME CGRectMake(30, 35, 10, 10)
#define ACTIVITYINDICATOR_TAG 999
#define BORDER_COLOR [[UIColor colorWithRed:FLOAT_COLOR_VALUE(200) green:FLOAT_COLOR_VALUE(210) blue:FLOAT_COLOR_VALUE(232) alpha:1.0] CGColor];
@implementation AsynchImage
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
-(void)loadExistingImage:(UIImage *)image {
if ([[self subviews] count]>0) {
[[[self subviews] objectAtIndex:0] removeFromSuperview];
}
UIImageView* _imageView = [[UIImageView alloc] init];
_imageView.frame = CGRectMake(2, 2, self.frame.size.width-4, self.frame.size.height-4);
_imageView.image = image;
_imageView.layer.borderWidth= 2.5f;
_imageView.layer.borderColor=BORDER_COLOR
_imageView.contentMode = UIViewContentModeScaleToFill;
_imageView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
[self addSubview:_imageView];
_imageView =nil;
[_imageView setNeedsLayout];
[self setNeedsLayout];
}
- (void)loadImageFromURL:(NSURL *)url{
self.layer.borderColor = BORDER_COLOR
self.layer.borderWidth = 2.5f;
UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc]
initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
activityIndicator.frame=ACTIVITY_FRAME;
activityIndicator.center=CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
activityIndicator.tag = ACTIVITYINDICATOR_TAG;
[self addSubview:activityIndicator];
[activityIndicator startAnimating];
if (data!=nil) { data = nil; }
NSURLRequest* request = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:30.0];
connection = [[NSURLConnection alloc]
initWithRequest:request delegate:self];
}
#pragma mark - delegates
- (void)connection:(NSURLConnection *)theConnection
didReceiveData:(NSData *)incrementalData {
if (data == nil) {
data = [[NSMutableData alloc] initWithCapacity:2048];
}
[data appendData:incrementalData];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)theConnection {
connection=nil;
if ([[self subviews] count]>0) {
[[[self subviews] objectAtIndex:0] removeFromSuperview];
}
imageView = [[UIImageView alloc] init];
imageView.frame = CGRectMake(0, 0, self.frame.size.width-1, self.frame.size.height-1);
imageView.image = [UIImage imageWithData:data];
//To crop Image
imageView.image=[self imageByScalingAndCroppingForSize:CGSizeMake(100, 100)];
int resolution=data.length;
if(resolution>800) {
}
imageView.contentMode=UIViewContentModeScaleToFill;
imageView.autoresizingMask = (UIViewAutoresizingFlexibleWidth |
UIViewAutoresizingFlexibleHeight);
[self addSubview:imageView];
[imageView setNeedsLayout];
[self setNeedsLayout];
imageView = nil;
// save the image to avoid multiple downloads
data=nil;
UIActivityIndicatorView *activity = (UIActivityIndicatorView *)[self
viewWithTag:ACTIVITYINDICATOR_TAG];
[activity removeFromSuperview];
}
- (void)connection:(NSURLConnection *)theConnection didFailWithError:(NSError *)error {
connection=nil;
UIImage *image = [UIImage imageNamed:@"userImage"];
[self loadExistingImage:image];
UIActivityIndicatorView *activity = (UIActivityIndicatorView *)[self viewWithTag:ACTIVITYINDICATOR_TAG];
[activity removeFromSuperview];
}
//crop Image
- (UIImage *)imageByScalingAndCroppingForSize:(CGSize)targetSize
{
UIImage *sourceImage = imageView.image;
UIImage *newImage = nil;
CGSize imageSize = sourceImage.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
CGFloat targetWidth = targetSize.width;
CGFloat targetHeight = targetSize.height;
CGFloat scaleFactor = 0.0;
CGFloat scaledWidth = targetWidth;
CGFloat scaledHeight = targetHeight;
CGPoint thumbnailPoint = CGPointMake(0.0,0.0);
if (CGSizeEqualToSize(imageSize, targetSize) == NO)
{
CGFloat widthFactor = targetWidth / width;
CGFloat heightFactor = targetHeight / height;
if (widthFactor > heightFactor)
scaleFactor = widthFactor; // scale to fit height
else
scaleFactor = heightFactor; // scale to fit width
scaledWidth = width * scaleFactor;
scaledHeight = height * scaleFactor;
// center the image
if (widthFactor > heightFactor)
{
thumbnailPoint.y = (targetHeight - scaledHeight) * 0.1;
}
else
if (widthFactor < heightFactor)
{
thumbnailPoint.x = (targetWidth - scaledWidth) * 0.1;
}
}
UIGraphicsBeginImageContext(targetSize); // this will crop
CGRect thumbnailRect = CGRectZero;
thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width = scaledWidth;
thumbnailRect.size.height = scaledHeight;
[sourceImage drawInRect:thumbnailRect];
newImage = UIGraphicsGetImageFromCurrentImageContext();
if(newImage == nil)
//pop the context to get back to the default
UIGraphicsEndImageContext();
return newImage;
}
@end
No comments:
Post a Comment