Here is the code for creating the triangular uiimageview -

    UIBezierPath *bzrPath = [UIBezierPath new];
    [bzrPath moveToPoint:(CGPoint){0, self.imgView.frame.size.height}];
    [bzrPath addLineToPoint:(CGPoint){80, 0}];
    [bzrPath addLineToPoint:(CGPoint){160, self.imgView.frame.size.height}];
    [bzrPath closePath];
    
    // 2. Create a CAShapeLayer with this triangular path
    // Same size as the original imageView
    CAShapeLayer *mask = [CAShapeLayer new];
    mask.frame = self.imgView.bounds;
    mask.path = bzrPath.CGPath;
    
    // 3. Mask the imageView's layer with this shape
    self.imgView.layer.mask = mask;
    self.imgView.layer.borderWidth=2.0f;
    self.imgView.layer.borderColor=(__bridge CGColorRef _Nullable)([UIColor blackColor]);

We can change the coordinates i.e. width and height of imageview according to the requirement. and then load the image in the imageview.