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把图片切成小片(IOS)

时间:2015-01-05 14:51:55      阅读:201      评论:0      收藏:0      [点我收藏+]

标签:ios

把图片切成小片(IOS)

by 伍雪颖

技术分享

#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>

int main(int argc, const char * argv[]) {
   
@autoreleasepool {
       
if (argc < 2) {
           
return 0;
        }
       
NSString *inputFile = [NSString stringWithCString:argv[1] encoding:NSUTF8StringEncoding];
       
CGFloat titleSize = 256;
       
NSString *outputPath = [inputFile stringByDeletingPathExtension];
       
       
NSImage *image = [[NSImage alloc] initWithContentsOfFile:inputFile];
       
NSSize size = [image size];
       
NSArray *representations = [image representations];
       
if ([representations count]) {
           
NSBitmapImageRep *representation = representations[0];
            size.
width = [representation pixelsWide];
            size.
height = [representation pixelsHigh];
        }
       
NSRect rect = NSMakeRect(0, 0, size.width, size.height);
       
CGImageRef imageRef = [image CGImageForProposedRect:&rect context:NULL hints:nil];
       
       
NSInteger rows = ceil(size.height/titleSize);
       
NSInteger cols = ceil(size.width/titleSize);
       
       
for (int y =0;y<rows;++y) {
           
for (int x=0;x<cols;++x) {
               
CGRect titleRect = CGRectMake(x*titleSize, y*titleSize, titleSize, titleSize);
               
CGImageRef titleImage = CGImageCreateWithImageInRect(imageRef, titleRect);
               
               
NSBitmapImageRep *imageRep = [[NSBitmapImageRep alloc] initWithCGImage:titleImage];
               
NSData *data = [imageRep representationUsingType:NSJPEGFileType properties:nil];
               
CGImageRelease(titleImage);
               
               
NSString *path = [outputPath stringByAppendingFormat:@"_%02i_%02i.jpg",x,y];
                [data
writeToFile:path atomically:NO];
            }
        }
    }
   
return 0;
}

终端运行:
./CutImageAPP 1.jpg

把图片切成小片(IOS)

标签:ios

原文地址:http://blog.csdn.net/rainlesvio/article/details/42422799

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