IOS Study Notes-UIButton, ios-uibutton

IOS Study Notes-UIButton, ios-uibutton

UIButtonClass implements a button on the touch screen. A button intercepts touch events and sends an action message to a target object when tapped. Methods for setting the target and action are inherited fromUIControl. This class provides methods for setting the title, image, and other appearance properties of a button. by using these accessors, you can specify a different appearance for each button state. (ios official documentation)

Creating Buttons

Class Method: buttonWithType:

+ (Id) buttonWithType :( UIButtonType)buttonType

Parameters:

Typedef enum {

UIButtonTypeCustom = 0, -- No button style

UIButtonTypeSystem, -- A system style button, such as those shown in navigation bars and toolbars (Available in iOS 7.0 and later ).

UIButtonTypeDetailDisclosure, -- A detail disclosure button

UIButtonTypeInfoLight, -- An information button that has a light background

UIButtonTypeInfoDark, -- An information button that has a dark background

UIButtonTypeContactAdd, -- A contact add button

UIButtonTypeRoundedRect, -- A rounded-rectangle style button

} UIButtonType;

 

Refreshing the Button Title

Attribute: titleLabel:

@ Property (nonatomic, readonly, retain) UILabel * titleLabel

A view that displays the value ofcurrentTitleProperty for a button. (read-only)

Use its own properties primarliy to configure the text of the button.

Use the setTitleColor: forState: and setTitleShadowColor: forState: mothods of this class to make those changes.

 

Property: currentTitle:

@ Property (nonatomic, readonly, retain) NSString * currentTitle

The value for this property is set automatically whenever the button state changes.

TitleForState:

Returns the title associated with the specified state.

-(NSString *) titleForState :( UIControlState)state

Parameters:UIControlState

 

Method:-setTitle: forState:

Sets the title to use for the specified state.

-(Void) setTitle :( NSString *)title
ForState :( UIControlState)state

 

Method: attributedTitleForState:

 

Method: setAttributedTitle: forState

 

Method: titleColorForState:

 

Method: setTitleColor: forState:

 

Method: titleShadowColorForState:

 

Method: setTitleShadowColor: forState:

 

Property: reversesTitleShadowWhenHighlighted:

 

 

Processing Button Presentation

Attribute: adjustsImageWhenHighlighted

A Boolean value that determines whether the image changes when the button is highlighted.

@ Property (nonatomic) BOOL adjustsImageWhenHighlighted

 

Property: adjustsImageWhenDisabled

A Boolean value that determines whether the image changes when the button is disabled.

@ Property (nonatomic) BOOL adjustsImageWhenDisabled

 

Property: showsTouchWhenHighlighted

A Boolean value that determines whether tapping the button causes it to glow.

@ Property (nonatomic) BOOL showsTouchWhenHighlighted

 

BackgroundImageForState

 

ImageForState:

 

SetBackgroundImage: forState:

 

SetImage: forState:

 

Attribute: tintColor

 

Link: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIButton_Class/index.html#//apple_ref/doc/uid/TP40006815

References:

 View Programming Guide for iOS.

Buttons.