Custom Component, drag button

Custom Component, drag button

First, the header file

#import <UIKit/UIKit.h>

@interface Dragicon:uiview//Drag the View

{

Cgpoint lastloction;

BOOL movechanged;

Cgpoint Touchbeginpoint;

Cgpoint Touchmovedpoint;

Cgpoint Touchendpoint;

}

@property (nonatomic) Cgpoint lastloction;

@property (nonatomic,assign) ID delegate;

@end

@interface Nqscrollbutton:uiview

{

DragIcon * icon;

}

@property (nonatomic,assign) ID delegate;

@end

Two source files

#import "NQScrollButton.h"

@implementation Nqscrollbutton

@synthesize delegate;

-(ID) initWithFrame: (CGRect) frame

{

self = [super Initwithframe:frame];

if (self) {

uiimageview* Imagebg=[[uiimageview alloc] initwithimage:[uiimageimagenamed:@ "Dragbt-bg.png"];

[SELFADDSUBVIEW:IMAGEBG];

[IMAGEBG release];

Scrollcontrol=[[uiscrollview Alloc] Initwithframe:cgrectmake (0, 0, Frame.size.width, frame.size.height)];

Icon=[[dragicon Alloc] Initwithframe:cgrectmake (0,0, Frame.size.height, Frame.size.height)];

[Selfaddsubview:icon];

Icon.backgroundcolor=[uicolorclearcolor];

icon.delegate=self;

[Iconrelease];

}

return self;

}

/*

Only override Drawrect:if perform custom drawing.

An empty implementation adversely affects performance during animation.

-(void) DrawRect: (cgrect) rect

{

Drawing Code

}

*/

-(void) Dowhat: (NSString *) dowhat

{

if (self.delegate && [self.delegaterespondstoselector: @selector (Dowhat:andscrollbutton:)]) {

[Self.delegateperformselector: @selector (Dowhat:andscrollbutton:) Withobject:[nsstringstringwithstring:dowhat] Withobject:self];

}

if ([Dowhat isequaltostring:@ "left"]) {

//

}else//right

//    {

//

//    }

}

@end

@implementation DragIcon

@synthesize Lastloction, delegate;

-(ID) initWithFrame: (CGRect) frame

{

self = [super Initwithframe:frame];

if (self) {

uiimageview* Icopg=[[uiimageviewalloc] initwithimage:[uiimageimagenamed:@ "Dragbt.png"];

Icopg.frame=cgrectmake (0,0, Frame.size.width, frame.size.height);

[SELFADDSUBVIEW:ICOPG];

[ICOPG release];

Self.backgroundcolor=[uicolorclearcolor];

}

return self;

}

-(void) Touchesbegan: (Nsset *) touches withevent: (Uievent *) Event {

Uitouch *touch = [Touchesanyobject];

Cgpoint location = [Touchlocationinview:self];

self.lastloction = location;

Movechanged =no;

}

-(void) touchesended: (Nsset *) touches withevent: (Uievent *) Event {

Cgpoint location = [[Touchesanyobject] locationinview:self];

lastloction = location;

Touchmovedpoint = Cgpointzero;

if (SELF.FRAME.ORIGIN.X>SELF.SUPERVIEW.FRAME.SIZE.WIDTH/2-SELF.FRAME.SIZE.WIDTH/2) {//to the right

[uiviewanimatewithduration:0.3animations:^{

Self.frame =cgrectmake (SELF.SUPERVIEW.FRAME.SIZE.WIDTH-SELF.FRAME.SIZE.WIDTH,SELF.FRAME.ORIGIN.Y, Self.frame.size.width,self.frame.size.height);

} completion:^ (BOOL finished) {

if (self.delegate && [self.delegaterespondstoselector: @selector (dowhat:)]) {

[Self.delegateperformselector: @selector (dowhat:) withobject:[nsstringstringwithstring:@ "right"];

}

}];

}else//to the left.

{

[uiviewanimatewithduration:0.3animations:^{

Self.frame =cgrectmake (0,self.frame.origin.y,self.frame.size.width,self.frame.size.height);

} completion:^ (BOOL finished) {

if (self.delegate && [self.delegaterespondstoselector: @selector (dowhat:)]) {

[Self.delegateperformselector: @selector (dowhat:) withobject:[nsstringstringwithstring:@ "left"];

}

}];

}

}

-(void) touchesmoved: (Nsset *) touches withevent: (Uievent *) event;

{

Uitouch *t = [touches anyobject];

if ([ttapcount] = = 1) {

Cgpoint _movepoint=[t LocationInView:self.superview];

CGFloat xx = 0;

if (Cgpointequaltopoint (Touchmovedpoint,cgpointzero)) {

Touchmovedpoint = _movepoint;

Return

}else{

xx = self.frame.origin.x + _movepoint.x-touchmovedpoint.x;

}

if (xx<0) {

xx=0;

}

if (xx>self.superview.frame.size.width-self.frame.size.width) {

Xx=self.superview.frame.size.width-self.frame.size.width;

}

Self.frame =cgrectmake (xx,self.frame.origin.y,self.frame.size.width,self.frame.size.height);

Touchmovedpoint = _movepoint;

}

}

@end