iOS学习笔记-UIImage转换为NSData

建立分类UIImage+ToData
UIImage+ToData.h

#import 

@interface UIImage (ToData)
+(NSData*)getDataFromImage:(UIImage*)image;
@end

UIImage+ToData.m

#import "UIImage+ToData.h"

@implementation UIImage (ToData)
//将UIImage转换为NSData

+(NSData*)getDataFromImage:(UIImage*)image{
    
    NSData *data;
    
    /*判断图片是不是png格式的文件*/
    
    if(UIImagePNGRepresentation(image))
        
        data = UIImagePNGRepresentation(image);
    
    /*判断图片是不是jpeg格式的文件*/
    
    else
        
        data = UIImageJPEGRepresentation(image,1.0);
    
    return data;
}
@end