The IOS UI Learning Tutorial uses code to create Button_ios

This article uses code to create a button that is divided into 5 steps, respectively:

1, define a button, according to the definition of location can be defined as local variables or global variables;

2, initialization button, generally using a rectangular initialization;

3, set the button control of other properties, such as background pictures, or background color, or button display text and other attributes;

4, add the response event and write the function content of the response event;

5. Load the created control into the window.

Five steps for specific operations see the following figure:

The specific code is as follows:

UIButton *btn;
  BTN = [[UIButton alloc]initwithframe:cgrectmake (0, 418, 760)];
  UIImage *img = [uiimage imagenamed:@ "fa.jpg"];
  [Btn settitle:@ "SDFDSFD" forstate:uicontrolstatenormal];
  [Btn setbackgroundimage:img forstate:uicontrolstatenormal];
  [Btn addtarget:self action: @selector (haha:) forcontrolevents:uicontroleventtouchupinside];
  [Self.view ADDSUBVIEW:BTN];

Response Event code:

 -(void) haha: (ID) sender{
  NSLog (@ "btn was clicked");
 }

The above is the entire content of this article, I hope to help you learn.