The idea of creating code for common Controls (UIButton, UILabel) for iOS development

Code creation button UIButton:

(i) Basic settings

Create an Intermediate "+" button

UIButton *addbtn = [[UIButton alloc] init];

Set the default background picture

[Addbtn setbackgroundimage:[uiimage imagenamed:@ "Addbuttonicon"] forstate:uicontrolstatenormal];

Set the background picture when pressed

[Addbtn setbackgroundimage:[uiimage imagenamed:@ "addbuttonicon-active"] forstate:uicontrolstatehighlighted];

Add Response Events

[Addbtn addtarget:self Action: @selector (Addbtndidclick) forcontrolevents:uicontroleventtouchupinside];

Add a button to the Tabbar

[Self addsubview:addbtn];

(b) Setting the size and position

Set the position of the "+" button

Self.addButton.centerX = Self.centerx;

Self.addButton.centerY = self.height * 0.5-1.5 * addbuttonmargin;

Set the size of the "+" button to the size of the picture

Self.addButton.size = Cgsizemake (Self.addButton.currentBackgroundImage.size.width, Self.addButton.currentBackgroundImage.size.height);

(iii) Implementation of the Click event Processing method Addbtndidclick

Code creation Uilabel:

Create and set the text below the "+" button to "add"

UILabel *ADDLBL = [[UILabel alloc] init];

Addlbl.text = @ "Add";

Addlbl.font = [Uifont systemfontofsize:10];

Addlbl.textcolor = [Uicolor Graycolor];

[Addlbl SizeToFit];

Set the location of the "Add" label

Addlbl.centerx = Self.addButton.centerX;

Addlbl.centery = Cgrectgetmaxy (self.addButton.frame) + 0.5 * addbuttonmargin + 0.5;

[Self ADDSUBVIEW:ADDLBL];

Other control code creation ideas : Set the size, position, set the basic state (such as background picture, title, text size, color), add the view to the parent view, and finally implement the corresponding interactive event processing method (if necessary)

The idea of creating code for common Controls (UIButton, UILabel) for iOS development