Objective C从远程url下载图片方法汇总_IOS开发--HTML5中文学习网

　　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];

　　以上所述就是本文的全部内容了，希望大家能够喜欢。