首页 / 移动开发 / IOS / Objective C从远程url下载图片方法汇总

- （UIImage *） getImageFromURL: （NSString *）theURL {UIImage *theImage = NULL;NSString *imageFileName = [BT_strings getFileNameFromURL:theURL];NSData *imageData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:theURL]];theImage = [[UIImage alloc] initWithData:imageData];[BT_fileManager saveImageToFile:theImage fileName:imageFileName];return theImage;}

NSString* imageURL = [NSString stringWithFormat: @"http://theimageurl.com/?id=%@", [[resultsEntries objectAtIndex:0] objectForKey: @"image_large"]];NSData* imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:imageURL]]; UIImage* image = [[UIImage alloc] initWithData:imageData]; // resize imageCGSize newSize = CGSizeMake（100, 100）;UIGraphicsBeginImageContext（ newSize ）;// a CGSize that has the size you want[image drawInRect:CGRectMake（0,0,newSize.width,newSize.height）]; //image is the original UIImageUIImage* newImage = UIGraphicsGetImageFromCurrentImageContext（）;UIGraphicsEndImageContext（）; imageHeight = image.size.height;[imageMain setImage:newImage];[imageData release];[image release];