IOS常用第三方框架 --- UIImage+Resize 调整图片大小

GitHub：https://github.com/coryalder/UIImage_Resize

提供多种方法为图片设置透明度、圆角、裁剪、调整大小等：

- (UIImage *)imageWithAlpha;- (UIImage *)transparentBorderImage:(NSUInteger)borderSize;- (UIImage *)roundedCornerImage:(NSInteger)cornerSize borderSize:(NSInteger)borderSize;- (UIImage *)croppedImage:(CGRect)bounds;- (UIImage *)thumbnailImage:(NSInteger)thumbnailSize transparentBorder:(NSUInteger)borderSize               cornerRadius:(NSUInteger)cornerRadius       interpolationQuality:(CGInterpolationQuality)quality;- (UIImage *)resizedImage:(CGSize)newSize     interpolationQuality:(CGInterpolationQuality)quality;- (UIImage *)  resizedImageWithContentMode:(UIViewContentMode)contentMode                       bounds:(CGSize)bounds         interpolationQuality:(CGInterpolationQuality)quality;

更详细使用见：http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/

ImageCacheResize 异步加载图片、缓存及调整大小

GitHub：https://github.com/toptierlabs/ImageCacheResize

整合了SDWebImage和UIImage+Resize的功能，用于图片的异步加载、缓存、以及下载完成后调整大小并显示在UIImageView上。

提供了以下API用于加载图片以及加载完成后调整图片大小：

- (void)setImageWithURL:(NSURL *)url andCropToBounds:(CGRect)bounds;- (void)setImageWithURL:(NSURL *)url andResize:(CGSize)size withContentMode:(UIViewContentMode)mode;- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder andCropToBounds:(CGRect)bounds;- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options  andResize:(CGSize)size;- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options  andResize:(CGSize)size withContentMode:(UIViewContentMode)mode;- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options  andCropToBounds:(CGRect)bounds;

使用方法和SDWebImage一样简单，如以下官方例子：

// 按比例缩放[imageview setImageWithURL:[NSURL URLWithString:@"http://t0.gstatic.com/images?q=tbn:ANd9GcQfraHpiabjEY8iDdBe9OUQYHMtwfuAv9ZRR0RYKuoVF_EpE8Fp5A"] andResize:CGSizeMake(30, 30) withContentMode:UIViewContentModeScaleAspectFit]; // 裁剪成100x100大小[imageview setImageWithURL:[NSURL URLWithString:@"http://t0.gstatic.com/images?q=tbn:ANd9GcQfraHpiabjEY8iDdBe9OUQYHMtwfuAv9ZRR0RYKuoVF_EpE8Fp5A"] andCropToBounds:CGRectMake(0, 0, 100, 100)];