iphone-common-codes-ccteam源代码 CCUIImage.m-优快云博客

本文提供了一系列UIImage类的实用操作方法，包括图片缩放、裁剪、保存至相册等功能，便于开发者快速实现图片处理需求。

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//
//  CCUIImage.m
//  CCFC
//
//  Created by xichen on 11-12-24.
//  Copyright 2011 ccteam. All rights reserved.
//






@implementation UIImage(cc)


// returns the scaled image
- (UIImage *)scale:(float)scaleSize
{
        
        UIGraphicsBeginImageContext(
                        CGSizeMake(self.size.width * scaleSize, self.size.height * scaleSize));
        [self drawInRect:CGRectMake(0, 0, self.size.width * scaleSize, self.size.height * scaleSize)];
        UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
                                                                
        return scaledImage;
}


// resize the img to indicated newSize
- (UIImage *)resizeImage:(CGSize)newSize
{
        UIGraphicsBeginImageContext(CGSizeMake(newSize.width, newSize.height));
        [self drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
        UIImage *resizeImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();


        return resizeImage;
        
}


// save PNG file to path
- (BOOL)savePNGToPath:(NSString *)fileFullPath
{
        return [UIImagePNGRepresentation(self) writeToFile:fileFullPath atomically:YES];
}


// save the img to photos album
- (void)saveImgToPhotosAlbum
{
        UIImageWriteToSavedPhotosAlbum(self, nil, nil, nil);
}


// get part of the image
- (UIImage *)getPartOfImage:(CGRect)partRect
{
        CGImageRef imageRef = self.CGImage;
        CGImageRef imagePartRef = CGImageCreateWithImageInRect(imageRef, partRect);
        return [UIImage imageWithCGImage:imagePartRef];
}


// returns UIImage * from text
+ (UIImage *)imageFromText:(NSString *)text font:(UIFont *)font
{            
        CGSize size  = [text sizeWithFont:font];     
        UIGraphicsBeginImageContext(size);  
        
        CGContextRef ctx = UIGraphicsGetCurrentContext();       
        [text drawAtPoint:CGPointMake(0, 0) withFont:font];      
        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();          
        UIGraphicsEndImageContext(); 
        CGContextRelease(ctx);
        
        return image;  
} 


#if CC_ENABLE_PRIVATE_API && CC_COMPILE_PRIVATE_CLASS
+ (UIImage *)getFullScreenImg
{
        CGImageRef screenImg = UIGetScreenImage();
        return [UIImage imageWithCGImage:screenImg];
}
#endif


@end

可能有更新:

googlecode链接地址：http://code.google.com/p/iphone-common-codes-ccteam/source/browse/trunk/CCFC/files/CCUIImage.m
github地址: https://github.com/cxsjabc/iphone-common-codes-ccteam/tree/master/CCFC/files/CCUIImage.m