crea un UIImage da due UIImageView

Question

Ho due UIImageView su UIView. Ogni UIImageView ha un UIImage. Ora voglio creare un UIImage da due UIImageView.

Si prega di dare il suggerimento come posso fare questo.

Answer 1

Se tu abbia una vista di tre UIImageViews e creare punti vendita corrispondenti

IBOutlet UIImageView *imageView1; 
IBOutlet UIImageView *imageView2; 
IBOutlet UIImageView *imageView3; 

Si può fare qualcosa di simile a quanto segue per combinare imageViews 1 e 2 in IMAGEVIEW 3

UIGraphicsBeginImageContext(imageView1.image.size); 

CGRect rect = CGRectMake(0, 0, imageView1.image.size.width, imageView1.image.size.height); 

[imageView1.image drawInRect:rect]; 
[imageView2.image drawInRect:rect blendMode:kCGBlendModeScreen alpha:0.5]; 

UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 

[imageView3 setImage:resultingImage]; 

CGBlendMode consente di scegli tra una delle seguenti operazioni di compositing per le tue immagini:

enum CGBlendMode { 
    kCGBlendModeNormal, 
    kCGBlendModeMultiply, 
    kCGBlendModeScreen, 
    kCGBlendModeOverlay, 
    kCGBlendModeDarken, 
    kCGBlendModeLighten, 
    kCGBlendModeColorDodge, 
    kCGBlendModeColorBurn, 
    kCGBlendModeSoftLight, 
    kCGBlendModeHardLight, 
    kCGBlendModeDifference, 
    kCGBlendModeExclusion, 
    kCGBlendModeHue, 
    kCGBlendModeSaturation, 
    kCGBlendModeColor, 
    kCGBlendModeLuminosity, 
    kCGBlendModeClear, 
    kCGBlendModeCopy, 
    kCGBlendModeSourceIn, 
    kCGBlendModeSourceOut, 
    kCGBlendModeSourceAtop, 
    kCGBlendModeDestinationOver, 
    kCGBlendModeDestinationIn, 
    kCGBlendModeDestinationOut, 
    kCGBlendModeDestinationAtop, 
    kCGBlendModeXOR, 
    kCGBlendModePlusDarker, 
    kCGBlendModePlusLighter 
};