multi touch pad

: ff00 binary: 1111111100000000// After x y, multiply the upper and lower values of x and y to get the result: 0000000100000000.// Then: (x y) >>> 8 shifted to the right, and 8 digits: 00000001System. out. println ("finger number is" + z );Int w = x 0x00ff;// X = 261 SIXTEEN: 0105 binary: 0000000100000101// Y = 0x00ff: 16: ff00 binary: 0000000011111111// After x y is multiplied by x and y, the result is: 0000000000000101 the JVM automatically converts the binary into decimal.System. out. pri

Edge and Center detection:Cgrectgetminx returns the coordinates of the left edge of the rectangle.Cgrectgetminy returns the coordinates of the bottom edge of the rectangle.CGRECTGETMIDX returns the x-coordinate of the center of the rectangle.Cgrectgetmidy returns the y-coordinate of the center of the rectangle.Cgrectgetmaxx returns the coordinates of the right edge of the rectangle.Cgrectgetmaxy returns the coordinates of the top edge of the rectangle.Reference: "AppStore Nuggets-iphone SDK Appl