将资源文件转换为头文件嵌入到工程

/** 将 png 图片的数据以字节数组的方式存入头文件，将头文件持久化到磁盘系统中~ */

-(void) savePngBytesAsHeaderFile:(NSString*)pngName columns:(int)columns {

// 唯有这种方式取得的 NSData 对象的 length 属性不再为0，有效!!

NSString *filePath = [[NSBundle mainBundle] pathForResource:pngName ofType:@"png"];

NSData *imageData = [[NSData alloc] initWithContentsOfFile:filePath];

Byte *bytes = (Byte*)[imageData bytes];

NSUInteger length = [imageData length];

NSMutableString *hexStr = [NSMutableStringstring];

NSString *nameModified = [NSString stringWithString:pngName];

// 将图片名称中的 '-' 替换成 '_' ~

nameModified = [nameModifiedstringByReplacingOccurrencesOfString:@"-"withString:@"_"];

[hexStrappendFormat:@"#ifndef MacEncryptTool_%@_PNG_H\n", [nameModifieduppercaseString]];

[hexStrappendFormat:@"#define MacEncryptTool_%@_PNG_H\n\n", [nameModifieduppercaseString]];

[hexStrappendFormat:@"unsigned char %@_png[] = {\n\t", nameModified];

NSString *splitStr = [NSString stringWithString:@", "];

for(int i = 0; i < length; ++ i) {

NSString *itemStr = [NSString stringWithFormat:@"%x", bytes[i]&0xff];// 16进制数

if([itemStr length] == 1) { // 补一位 0 ~

itemStr = [NSStringstringWithFormat:@"0x0%@", itemStr];

} else {

itemStr = [NSStringstringWithFormat:@"0x%@", itemStr];

}

if(i != length-1) {

[hexStr appendFormat:@"%@%@", itemStr, splitStr];

if((i+1)%columns == 0) {

[hexStrappendString:@"\n\t"]; // 换行~

}

} else {

[hexStr appendFormat:@"%@\n", itemStr];

}

}

[hexStrappendFormat:@"};\nunsigned int %@_png_len = %u;\n", nameModified, length];

[hexStr appendString:@"\n#endif"];

NSString *fileName = [NSString stringWithFormat:@"%@.png.h", nameModified];

[hexStrwriteToFile:fileName atomically:NOencoding:NSUTF8StringEncodingerror:nil];

// NSData *fileData = [hexStr dataUsingEncoding:NSUTF8StringEncoding];

// [fileData writeToFile:fileName atomically:NO];

}