專案想設定在圖片上新增圓形圖片,可獲取不到imageView,實在沒辦法就在圖片上畫上圖片

Demo:

// 在圖片上新增圖片;imageName 1.底部圖片名字imageName， image2 需新增的圖片
- (UIImage *)createShareImage:(UIImage *)tImage ContextImage:(UIImage *)image2
{
    UIImage *sourceImage = tImage;
    CGSize imageSize; //畫的背景 大小
    imageSize = [sourceImage size];
    UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0);
    [sourceImage drawAtPoint:CGPointMake(0, 0)];
    //獲得 圖形上下文
    CGContextRef context=UIGraphicsGetCurrentContext();
    //畫 自己想要畫的內容(新增的圖片)
    CGContextDrawPath(context, kCGPathStroke);

    CGRect rect = CGRectMake( imageSize.width/4,imageSize.height/5, imageSize.width/2, imageSize.height/2);
    CGContextAddEllipseInRect(context, rect);
    CGContextClip(context);
    
    [image2 drawInRect:rect];
    
    //返回繪製的新圖形
    
    UIImage *newImage=UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    return newImage;
}
 

// 1.將文字新增到圖片上;imageName 圖片名字， text 需畫的字型
- (UIImage *)createShareImage:(UIImage *)tImage Context:(NSString *)text
{
    UIImage *sourceImage = tImage;
    CGSize imageSize; //畫的背景 大小
    imageSize = [sourceImage size];
    UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0);
    [sourceImage drawAtPoint:CGPointMake(0, 0)];
    //獲得 圖形上下文
    CGContextRef context=UIGraphicsGetCurrentContext();
    CGContextDrawPath(context, kCGPathStroke);
    CGFloat nameFont = 8.f;
    //畫 自己想要畫的內容
    NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:nameFont]};
    CGRect sizeToFit = [text boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, nameFont) options:NSStringDrawingUsesDeviceMetrics attributes:attributes context:nil];
    NSLog(@"圖片: %f %f",imageSize.width,imageSize.height);
    NSLog(@"sizeToFit: %f %f",sizeToFit.size.width,sizeToFit.size.height);
    CGContextSetFillColorWithColor(context, [UIColor blackColor].CGColor);
    [text drawAtPoint:CGPointMake((imageSize.width-sizeToFit.size.width)/2,0) withAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:nameFont]}];
    //返回繪製的新圖形
    
    UIImage *newImage=UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    return newImage;
}
 

Demo下載:https://github.com/ruiruiguo/DrawImage.git