3. IOS Programming UIButton

Before the configuration & creation is done, start the first step in application development: understand the application components. For example, buttons, text boxes, etc... This article introduces the button first.

1. Create a button

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {    Self.window = [[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]];    Self.window.backgroundColor = [Uicolor Whitecolor];    Uiviewcontroller *viewcontroller = [Uiviewcontroller alloc];        Self.window.rootViewController = Viewcontroller;    UIView *rootview = [[UIView alloc] initwithframe:[[uiscreen mainscreen] bounds]];        Viewcontroller.view = Rootview; /** * Create UIButton///Create button, you must use Buttonwithtype: To create, like above UIView or other can be used alloc UIButton *button = [Uibutt    On Buttonwithtype:uibuttontypesystem]; Sets the position, width, and height of the button.    Parameters: X-axis, y-axis, width, height button.frame = cgrectmake (100, 100, 100, 30);    Sets the background color of the button Button.backgroundcolor = [Uicolor Yellowcolor]; You must set the text of the button in this way and set its state.    Cannot use Button.titlelabel to set text, do not display [button settitle:@ "I am button" forstate:uicontrolstatenormal];             Add a button to the view control display [Rootview Addsubview:button]; [Self.window Makekeyandvisible]; return YES;}

1) Uibuttontype has the following enumeration values:
Uibuttontypecustom-----Custom
Uibuttontypesystem-----Standard system default
Uibuttontypedetaildisclosure----- Display the current list details, display I
Uibuttontypeinfolight----- Display a short message showing I
Uibuttontypeinfodark----- Display a short message showing I
Uibuttontypecontactadd----- Add information, display +

2) Uicontrolstate has the following enumeration values:
UIControlStateNormal----- Default
uicontrolstatehighlighted----- Highlight
uicontrolstatedisabled----- Disabled
uicontrolstateselected----- Selected

The other properties of the button can only be viewed by looking at the document, some piecemeal I will not write it out.

Operation Result:

2. Bind an Event

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {...    //Use AddTarget:action:forControlEvents: method to bind an event     [Button addtarget:self action: @selector (Click:) forcontrolevents:uicontroleventtouchupinside]; ...} Binding the method to be implemented click:-(void) Click: (ID) sender{    NSLog (@ "I am a button");}

The effect of clicking the button after running:

1) Uicontrolevent has the following enumeration values:

Uicontroleventtouchdown
Uicontroleventtouchdownrepeat
Uicontroleventtouchdraginside
Uicontroleventtouchdragoutside
Uicontroleventtouchdragenter
Uicontroleventtouchdragexit
UIControlEventTouchUpInside
Uicontroleventtouchupoutside
Uicontroleventtouchcancel
Uicontroleventvaluechanged
Uicontroleventeditingdidbegin
Uicontroleventeditingchanged
Uicontroleventeditingdidend
Uicontroleventeditingdidendonexit
Uicontroleventalltouchevents
Uicontroleventalleditingevents
Uicontroleventapplicationreserved
Uicontroleventsystemreserved (Application use)
Uicontroleventallevents (framework use)

The basic part, a brief introduction on the line, later encountered related to the other way to explain how to use.

Chapter Three, End!

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3. IOS Programming UIButton