自定义组件，拖拽BUTTON

 

一、头文件

#import<UIKit/UIKit.h>

@interface DragIcon :UIView //拖动的视图
{
    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

二源文件

#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 you 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) {//到右边

        [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//到左边
    {
        [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