- (NSDictionary *)addText:(NSString *)someText toImage:(NSDictionary *)attachment {
NSDictionary *dictValue = [EntrysOperateHelper dictFromJsonString:attachment[@"value"]];
CGFloat w = [dictValue[@"width"] floatValue];
CGFloat h =? [dictValue[@"height"] floatValue];
NSString *filePath = [CoredataManager filePathWithKey:dictValue[@"fileKey"] andOption:nil];
UIImage * img = [UIImage imageWithContentsOfFile:filePath];
int fontSize = (MIN(w, h) * 0.0468);
CGSize stringSize = [someText moaSizeWithFont:[UIFont systemFontOfSize:fontSize]];
//上下文的大小
//? ? CGColorSpaceRef colorSpace =CGColorSpaceCreateDeviceRGB(); //創(chuàng)建顏色
//? ? //創(chuàng)建上下文
//? ? CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
//
//? ? CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);//將img繪至context上下文中
//
//? ? char * text= (char *)[someText cStringUsingEncoding:NSASCIIStringEncoding];
//
//? ? CGContextSelectFont(context, "Arial", fontSize, kCGEncodingMacRoman);//設(shè)置字體的大小
//? ? CGContextSetTextDrawingMode(context, kCGTextFill);//設(shè)置字體繪制方式
//
////? ? 文字的顏色
//? ? CGContextSetFillColorWithColor(context, [[UIColor colorWithHexString:@"#ffffff" alpha:0.9] CGColor]);
////? ? CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
//? ? CGContextSetStrokeColorWithColor(context, [UIColor blackColor].CGColor);
//
//? ? //文字的位置
//? ? CGContextShowTextAtPoint(context, 10, 10, text, strlen(text));
//
//? ? CGImageRef imgCombined = CGBitmapContextCreateImage(context);//創(chuàng)建CGImage
//? ? CGContextRelease(context);
//? ? CGColorSpaceRelease(colorSpace);
//? ? UIImage *retImage = [UIImage imageWithCGImage:imgCombined]; //獲得添加水印后的圖片
//? ? CGImageRelease(imgCombined);
CGSize size= CGSizeMake(w, h); // 畫布大小
UIGraphicsBeginImageContextWithOptions (size, NO, 0.0);
[img drawAtPoint:CGPointMake (0, 0)];
// 獲得一個(gè)位圖圖形上下文
CGContextRef context= UIGraphicsGetCurrentContext();
CGContextDrawPath(context, kCGPathStroke);
[someText drawAtPoint:CGPointMake(w - fontSize - stringSize.width, h - fontSize - stringSize.height) withAttributes:@{
NSFontAttributeName:[UIFont systemFontOfSize:fontSize],
NSForegroundColorAttributeName:[UIColor colorWithHexString:@"#ffffff" alpha:0.9],
NSStrokeWidthAttributeName:@(-3),
NSStrokeColorAttributeName:[UIColor colorWithHexString:@"#000000" alpha:0.5]}];
// 返回繪制的新圖形
UIImage * retImage= UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *data = UIImageJPEGRepresentation(retImage, 1.0);
NSDictionary * dict = [IMMessageCell genertateDictWithContent:data andType:IMContentTypePicture option:nil];
[self removeFileAtDraft:[EntrysOperateHelper objFromString:attachment[@"value"]][@"fileKey"]];
NSAssert([dict isKindOfClass:[NSDictionary class]], @"genrerate IM attachment path error");
return dict;
}
