iOS截圖代碼

屏幕截圖小代碼，注意設置高寬和截圖區域，非ARC下注意釋放sendImage。

    //截圖
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0);
    [self.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    CGImageRef imageRef = viewImage.CGImage;
    CGRect rect =CGRectMake(100, 100, 200, 300);//這里可以設置想要截圖的區域
    CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);
    UIImage sendImage = [[UIImage alloc] initWithCGImage:imageRefRect];
    NSData *imageViewData = UIImagePNGRepresentation(sendImage);


NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"result.png"];
NSLog(@"%@", savedImagePath);
[imageViewData writeToFile:savedImagePath atomically:YES];
CGImageRelease(imageRefRect);</pre>