iOS Basic Learning UIButton use detailed

The UIButton button is the most commonly used control in iOS development, and as a basic learning tutorial for iOS, beginners need to understand their basic definitions and common settings to be proficient in development.

First, the definition of UIButton

UIButton *button=[[uibutton Buttonwithtype: (Uibuttontype);

There are 6 kinds of button types that can be defined,

typedef enum {

Uibuttontypecustom = 0, custom style

Uibuttontyperoundedrect Rectangle with rounded corners

Uibuttontypedetaildisclosure, Blue small arrow button, mainly to do detailed instructions with

Uibuttontypeinfolight, Bright exclamation

Uibuttontypeinfodark, Dark exclamation

Uibuttontypecontactadd, Cross plus button

} Uibuttontype;

Second, set frame

Button1.frame = CGRectMake (20, 20, 280, 40);

[Button Setframe:cgrectmake (20,20,50,50)];

Third, button background color

Button1.backgroundcolor = [Uicolor Clearcolor];

[Button Setbackgroundcolor:[uicolor Bluecolor]];

Iv. State

Forstate: The function of this parameter is to define what state the button text or picture will appear

enum {

UIControlStateNormal = 0, normal state appears

uicontrolstatehighlighted = 1 << 0, highlight status appears

uicontrolstatedisabled = 1 << 1, disabled status will not appear

uicontrolstateselected = 1 << 2, checked status

Uicontrolstateapplication = 0x00ff0000, when application flags

uicontrolstatereserved = 0xff000000 reserved for internal frames, you can ignore

};

@property (nonatomic,getter=isenabled) BOOL enabled; The default is YES. If NO, ignores touch events and subclasses may draw differently

@property (nonatomic,getter=isselected) BOOL selected; Default is NO would used by some subclasses or by application

@property (nonatomic,getter=ishighlighted) BOOL highlighted;

Five, set button fill picture and background picture

[buttonsetimage:[uiimageimagenamed:@ "Checkmarkcontrollericon"]forstate:uicontrolstatenormal];

[buttonsetbackgroundimage:[uiimageimagenamed:@ "Checkmarkcontrollericon"]forstate:uicontrolstatenormal];

Set the button title and title color

[Button1 settitle:@ "click" Forstate:uicontrolstatenormal];

[Buttonsettitlecolor:[uicolorredcolor]forstate:uicontrolstatenormal];

The Set button will glow.

Button.showstouchwhenhighlighted=no;

Eighth, add or remove event handling

[Button1 addtarget:self Action: @selector (Butclick:) forcontrolevents:uicontroleventtouchupinside];

[Btn Removetarget:nil Action:nil forcontrolevents:uicontroleventtouchupinside];

Ninth, set the inner picture spacing and caption Spacing of the button

Uiedgeinsets insets; Set picture spacing inside a button

Insets.top = Insets.bottom = Insets.right = Insets.left = 10;

Bt.contentedgeinsets = insets;

Bt.titleedgeinsets = insets; Title Spacing