Objective C从远程url下载图片方法汇总_IOS

Objective C从远程url下载图片方法汇总

2020-12-18 15:30iOS开发网 IOS

本文给大家分享了2则使用Objective C从远程url下载图片的方法，都是个人项目中使用的，汇总下推荐给大家，有需要的小伙伴可以参考下。

Objective C从远程url下载图片

									- (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;

									}

objective C从远程地址获取图片并修改尺寸

									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 image

									CGSize 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 UIImage

									UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

									UIGraphicsEndImageContext();    

									imageHeight = image.size.height;

									[imageMain setImage:newImage];

									[imageData release];

									[image release];