如何在iphone中的图像上添加文字？

Question

我需要在iPhone上的图像上放置一个文本.这就像Eurosport iPhone应用程序.

http://a2.mzstatic.com/us/r1000/092/Purple/v4/fa/d6/9e/fad69e44-29e2-a123-2a74-ad58ba5de36e/mza_1083026897138509692.320x480-75.jpg

以同样的方式,我需要在我的应用程序中放置一个文本.我怎样才能做到这一点？

谢谢.

Answer 1

我找到了两种方法

1:

    UIImageView *imageView = [[UIImageView alloc] init];
    imageView.frame = CGRectMake(0, 25, 200, 200);
    imageView.image = [UIImage imageNamed:@"Choice set.png"];

    UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 20)];
    myLabel.text = @"Hello There";
    myLabel.textColor = [UIColor whiteColor];
    myLabel.backgroundColor = [UIColor blueColor];
    [imageView addSubview:myLabel];

    [self.view addSubview:imageView];

    [imageView release];
    [myLabel release];

2:

添加文本到UIImage

-(UIImage *)addText:(UIImage *)img text:(NSString *)text1{

   int w = img.size.width;
   int h = img.size.height;
   CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
   CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
   CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);

   char* text= (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding];
   CGContextSelectFont(context, "Arial",20, kCGEncodingMacRoman);
   CGContextSetTextDrawingMode(context, kCGTextFill);
   CGContextSetRGBFillColor(context, 0, 0, 0, 1);
   CGContextShowTextAtPoint(context,10,10,text, strlen(text));
   CGImageRef imgCombined = CGBitmapContextCreateImage(context);

   CGContextRelease(context);
   CGColorSpaceRelease(colorSpace);

   UIImage *retImage = [UIImage imageWithCGImage:imgCombined];
   CGImageRelease(imgCombined);

   return retImage;
} 

然后打电话

UIImage *image = [UIImage imageNamed:@"myimage.png"];

imageView.image = [self addText:image text:@"Hello there"];