Using the Stretchableimagewithleftcapwidth method to implement a scalable picture

-(UIImage *) Stretchableimagewithleftcapwidth: (Nsinteger) leftcapwidth topcapheight: (Nsinteger) topcapheight

This is an example method of UIImage, its function is to create a content can be stretched, and the corner does not stretch the picture, requires two parameters, the first is the width of the left not stretched area, the second parameter is not stretched above the height.

Depending on the width and height of the setting, the next pixel is extended left and right and stretched up and down.

Note: The stretchable range is 1 vertical pixels after leftcapwidth, and 1 horizontal pixels after the distance of Topcapheight.

The meaning of the parameter is: if the parameters are 10 and 5 o'clock, 10 pixels to the left of the picture, 5 pixels above the top, not stretched, and a pixel with an X coordinate of 11 is tiled horizontally, and a pixel with a Y coordinate of 6 is tiled vertically.

Note: Only one pixel is tiled to a certain width, and the remaining pixels behind the image are not stretched.

1 UIImage *img=[uiimage imagenamed:@ "bubbleself.png"]; 2 img=[img stretchableimagewithleftcapwidth: topcapheight:[]; 3 uiimageview *imgv=[[Uiimageview alloc]initwithimage:img]; 4 [IMGV setframe:cgrectmake (ten)]; 5 [self. View ADDSUBVIEW:IMGV];

The effect is as follows (the effect produced by using the Stretchableimagewithleftcapwidth method on the left side is the original):

Using the Stretchableimagewithleftcapwidth method to implement a scalable picture