How to add a suspension button on TableView in Android development _android

If you paste the button directly on the Tableviewcontroller, it will cause this to scroll, and here are two ways to implement the fixed position suspension button on the TableView:

1. Paste TableView on view, then paste the hover button on the top of view

2. Use window

First look at the final effect, add a hover button on the Tableviewcontroller, which cannot scroll as the view Scrolls

First, introduce the first method above:

1 Create the properties of the TableView and bottom buttons

Screen width
#define KSCREENW [UIScreen mainscreen].bounds.size.width
//Screen height
#define KSCREENH [UIScreen Mainscreen].bounds.size.height
@interface Broadcastliveviewcontroller () <uitableviewdatasource, Uitableviewdelegate>
@property (nonatomic) UITableView *liveslisttable;
@property (nonatomic) UIButton *bottombutton;
@end

2 Create the property to the top of the

@implementation Broadcastliveviewcontroller
-(void) viewdidload {
[super viewdidload];
CGRect clientrect = [UIScreen mainscreen].bounds;
_liveslisttable = [[UITableView alloc] Initwithframe:cgrectmake (0, 0, ClientRect.size.width, CLIENTRECT.SIZE.HEIGHT-65) Style:uitableviewstyleplain];
[Self.view addsubview:_liveslisttable];
_liveslisttable.delegate = self;
_liveslisttable.datasource = self;
Self.bottombutton = [UIButton buttonwithtype:uibuttontypecustom];
Self.bottomButton.frame = CGRectMake (kScreenW-80, kScreenH-140,);
[Self.bottombutton setbackgroundimage:[uiimage imagenamed:@ "recordlive"] forstate:uicontrolstatenormal];
[Self.bottombutton addtarget:self Action: @selector (ONTAPLIVEBTN) forcontrolevents:uicontroleventtouchupinside];
[Self.view AddSubview:self.bottomButton];

3 Implement button Events

-(void) ontaplivebtn
{
NSLog (@ "click bottom Button");
}

Next, we'll introduce the second method:

1 Create a Window,button property to prevent window from being freed

Screen width
#define KSCREENW [UIScreen mainscreen].bounds.size.width
//Screen height
#define KSCREENH [UIScreen Mainscreen].bounds.size.height
@interface Broadcastliveviewcontroller () <uitableviewdatasource, Uitableviewdelegate>
@property (strong,nonatomic) UIWindow *window;
@property (strong,nonatomic) UIButton *button;
@end

2 Create window and button

The system has only one window by default this time we need to set the Windowlevel

window does not need to be added to any view

-(void) createbutton{
_button = [UIButton buttonwithtype:uibuttontypecustom];
[_button setbackgroundimage:[uiimage imagenamed:@ "recordlive"] forstate:uicontrolstatenormal];
_button.frame = CGRectMake (0, 0,);
[_button addtarget:self Action: @selector (ONTAPLIVEBTN) forcontrolevents:uicontroleventtouchupinside];
_window = [[UIWindow alloc]initwithframe:cgrectmake (kScreenW-80, kScreenH-80,);];
_window.windowlevel = uiwindowlevelalert+1;
_window.backgroundcolor = [Uicolor redcolor];
_window.layer.cornerradius =;
_window.layer.maskstobounds = YES;
[_window Addsubview:_button];
[_window makekeyandvisible];//key statement, displaying window
}

3 Delay Loading window, note that we need to create this suspension button after the Rootwindow creation is complete.

-(void) viewdidload {
[super viewdidload];
[Self performselector: @selector (Createbutton) Withobject:nil afterdelay:1]; 
}

4 Implement button Events

-(void) ontaplivebtn
{
NSLog (@ "click bottom Button");
}

Note:: Finally add a small function to make the tableview up and down when the button animation effect appears and disappeared, here is pulled away, the next drag out of the present

-(void) Scrollviewdidscroll: (Uiscrollview *) scrollview{
if (Scrollview.contentoffset.y > Self.offsety & & Scrollview.contentoffset.y > 0) {//Up slide
//button disappears
[UIView TransitionWithView:self.bottomButton duration:0.1 options:uiviewanimationoptiontransitionnone animations:^{
self.bottomButton.frame = CGRectMake ( KSCREENW-80, kScreenH-65);
Completion:null]; 
} else if (Scrollview.contentoffset.y < self.offsety) {//Slide down
//button appears
[UIView transitionwithview: Self.bottombutton duration:0.1 options:uiviewanimationoptiontransitionnone animations:^{
Self.bottomButton.frame = CGRectMake (kScreenW-80, kScreenH-140);
Completion:null];
}
self.offsety = scrollview.contentoffset.y;//Changes current offset to cache offset
}

The above is a small set to introduce the Android development in the TableView to add a suspension button on the method, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!