iOS開發——懸浮按鈕

標籤：

項目中需要在建立一個懸浮按鈕，自己覺得光建立一個按鈕不能滑動有點不太最佳化，就自己試著做了一個可以隨意拖動的懸浮按鈕，希望大家能夠多多支援。

 

  -(void)viewDidLoad{//建立懸浮按鈕    self.editEventsButton=[UIButton  buttonWithType:UIButtonTypeCustom];    self.editEventsButton.frame=CGRectMake(0, 0, 60, 60);    [self.editEventsButton  setBackgroundImage:[UIImage  imageNamed:@"問醫生"] forState:UIControlStateNormal];    [self.editEventsButton  addTarget:self action:@selector(gotoEditEvents) forControlEvents:UIControlEventTouchUpInside];    self.window=[[UIWindow  alloc] initWithFrame:CGRectMake(ScreenWidth-55, ScreenHeight-75-CGRectGetHeight(self.chartView.frame), 60, 60)];    self.window.windowLevel=UIWindowLevelAlert+1;    self.window.backgroundColor=[UIColor  clearColor];    self.window.layer.cornerRadius=20;    self.window.layer.masksToBounds=YES;    [self.window  addSubview:self.editEventsButton];        [self.window  makeKeyAndVisible];  //放一個拖動手勢，用來改變控制項的位置    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(changePostion:)];    [self.editEventsButton addGestureRecognizer:pan];    [self  charts];    [self  tabarTool];}//手勢事件 －－ 改變位置-(void)changePostion:(UIPanGestureRecognizer *)pan{    CGPoint point = [pan translationInView:self.window];        CGFloat width = [UIScreen mainScreen].bounds.size.width;    CGFloat height = [UIScreen mainScreen].bounds.size.height;    CGRect originalFrame = self.window.frame;    if (originalFrame.origin.x >= 0 && originalFrame.origin.x+originalFrame.size.width <= width) {        originalFrame.origin.x += point.x;    }    if (originalFrame.origin.y >= 0 && originalFrame.origin.y+originalFrame.size.height <= height) {        originalFrame.origin.y += point.y;    }    self.window.frame = originalFrame;    [pan setTranslation:CGPointZero inView:self.view];        if (pan.state == UIGestureRecognizerStateBegan) {        _editEventsButton.enabled = NO;    }else if (pan.state == UIGestureRecognizerStateChanged){            } else {                CGRect frame = self.window.frame;        //記錄是否越界        BOOL isOver = NO;                if (frame.origin.x < 0) {            frame.origin.x = 0;            isOver = YES;        } else if (frame.origin.x+frame.size.width > width) {            frame.origin.x = width - frame.size.width;            isOver = YES;        }                if (frame.origin.y < 0) {            frame.origin.y = 0;            isOver = YES;        } else if (frame.origin.y+frame.size.height > height) {            frame.origin.y = height - frame.size.height;            isOver = YES;        }        if (isOver) {            [UIView animateWithDuration:0.3 animations:^{                self.window.frame = frame;            }];        }        _editEventsButton.enabled = YES;    }}

 

iOS開發——懸浮按鈕