I described [self.view addSubView:myView];,
but, myView is not displaying self.view.
ViewController.h
#interface ViewController : UIViewController{
UIView *myView;
}
#property (nonatomic, strong) UIView *myView;
ViewController.m
#synthesize myView;
- (void)viewDidLoad
{
[super viewDidLoad];
myView.frame = CGRectMake(-10, 70, 320, 480);
[self.view addSubview:myView];
myView.backgroundColor = [UIColor redColor];
[self.view bringSubviewToFront:myView];
}
Do you have any solutions?
You need to allocate your view first:
- (void)viewDidLoad
{
[super viewDidLoad];
// If you use custom view change UIView to the custom class name
myView = [[UIView alloc] initWithFrame:CGRectMake(-10, 70, 320, 480)];
[self.view addSubview:myView];
myView.backgroundColor = [UIColor redColor];
[self.view bringSubviewToFront:myView];
}
Related
How to achieve the below design in iOS , is any controls available to achieve this. I am not that much experienced to achieve this design in native . Is it developed in native or kind of hybrid technology is used
Please find the below image for reference
I made a programmatic Example (Kind of "Hello World") for you
(it is programatic for a reason, that I believe it is easier to understand how things are working.
It is not perfect solution it can be done better, (performance wise) but I choose it as a simple example to get you started (Personally I would use CALayer for the backgrounds).
so here:
make a new class as follows:
MyView.h
#import <UIKit/UIKit.h>
#interface MyView : UIView
#end
MyView.m
#import "MyView.h"
#implementation MyView
- (instancetype)initWithFrame:(CGRect)frame
{
if(self = [super initWithFrame:frame])
{
self.backgroundColor = [UIColor grayColor];
//This rect is in self coordinate system
UIView * viewPurple = [[UIView alloc]initWithFrame:CGRectMake(0, 200, frame.size.width, 50)];
viewPurple.backgroundColor = [UIColor purpleColor];
[self addSubview:viewPurple];
//This rect is in viewPurple's coordinate system
UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, frame.size.width/2, 50)];
[label setText:#"Hello World!"];
[label setTextAlignment:(NSTextAlignmentCenter)];
[label setTextColor:[UIColor whiteColor]];
[viewPurple addSubview:label];
//All the frame's rects are in it's `superView`/ parent 's coordinate system.
UIView * viewGreen = [[UIView alloc]initWithFrame:CGRectMake(frame.size.width/2, 200, frame.size.width, 50)];
viewGreen.backgroundColor = [UIColor cyanColor];
[self addSubview:viewGreen];
UILabel * label2 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, frame.size.width/2, 50)];
[label2 setText:#"World Hello!"];
[label2 setTextAlignment:(NSTextAlignmentCenter)];
[label2 setTextColor:[UIColor whiteColor]];
[viewGreen addSubview:label2];
}
else
{
//Can't allocate the UIView - quite a rare problem.
}
return self;
}
#end
#import "myView.h" in your view controller
and add this snippet to the - (void)viewDidLoad method.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
MyView * view = [[MyView alloc]initWithFrame:self.view.frame];
[self.view addSubview:view];
}
the result will be as follow
I create a tableView in a class inherit from UIView.It works well when I add a button at tableFooterView on this tableView.
CustomView.h
#import <UIKit/UIKit.h>
#interface CustomView : UIView<UITableViewDelegate,UITableViewDataSource>
#end
CustomView.m
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{
UIView * customView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 80)];
UIButton * tempButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 40)];
tempButton.center = customView.center;
tempButton.backgroundColor = [UIColor redColor];
[tempButton addTarget:self action:#selector(doButtonAction) forControlEvents:UIControlEventTouchUpInside];
[customView addSubview:tempButton];
return customView;
}
- (void)doButtonAction{
NSLog(#"123");
}
NSLog:123
However,I public this button and make a target-action in my controller.It response nothing.
CustomView.h
#property (strong, nonatomic) UIButton * tempButton;
CustomView.m
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{
UIView * customView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 80)];
self.tempButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 40)];
self.tempButton.center = customView.center;
[customView addSubview:self.tempButton];
return customView;
}
ViewController.h
- (void)viewDidLoad {
[super viewDidLoad];
CustomView *cv = [[CustomView alloc] initWithFrame:self.view.bounds ];
[cv.tempButton addTarget:self action:#selector(doButtonAction) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:cv];
}
- (void)doButtonAction{
NSLog(#"123");
}
what did I miss?
In the viewdidload you are not set any thing on the button,
You just assign in the #interface.
but you must be alloc and set the frame and backgroundcolor and all properties on the button in the viewdidload .
After that it will work.
May be it will help you or feel free.
I'm getting an EXC_BAD_ACCESS error when I tap the UIButton. If I move the logic to the RootViewController.m it works, but not when implemented in my PanelViewController.m. I can't understand why this wouldn't work, what am I missing and how can I get this to work?
RootViewController.m
#import "RootViewController.h"
#import "PanelViewController.h"
#interface ListViewRootController ()
#end
#implementation ListViewRootController
- (void)viewDidLoad {
[super viewDidLoad];
[self.view setFrame:CGRectMake(0, [[UIScreen mainScreen] bounds].size.height, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height)];
[self.view setBackgroundColor:[UIColor blueColor]];
PanelViewController *panelView = [[PanelViewController alloc] init];
[self.view addSubview:panelView.view];
}
#end
PanelViewController.m
#import "PanelViewController.h"
#interface PanelViewController ()
#end
#implementation PanelViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIView *topBar = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 60)];
topBar.backgroundColor = [UIColor whiteColor];
UIButton *mapButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, topBar.frame.size.height)];
[mapButton setTitle:#"Map" forState:UIControlStateNormal];
[mapButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[mapButton addTarget:self action:#selector(mapViewToggle:) forControlEvents:UIControlEventTouchDown];
[self.view addSubview:topBar];
[topBar addSubview:mapButton];
}
- (void)mapViewToggle:(UIButton *)sender{
NSLog(#"hello, is it me youre looking for");
}
#end
yes, it won't work, panelView controller is released after this
PanelViewController *panelView = [[PanelViewController alloc] init];
You should have a var in .h of RootViewController, somethings like
#interface RootViewController : UIViewController {
PanelViewController *panelView;
}
then:
panelView = [[PanelViewController alloc] init];
[self.view addSubview:panelView.view];
I'm try to add a scrollview totally by code to a modal view, but it doesn't show.
I've tried different ways but I can't see the mistake,
Somebody could help me?
here my code:
#interface AddWithScrollOrizontal ()<UIScrollViewDelegate>{
//IBOutlet UIScrollView*scroll;
}
#property (strong, nonatomic) UIScrollView*scroll;
#implementation AddWithScrollOrizontal
#synthesize scroll;
- (void)viewDidLoad
{
self.scroll = [[UIScrollView alloc]init];
self.scroll.delegate = self;
if (IS_IPHONE_5) {
self.scroll.frame = CGRectMake(0, 58, 320, 270);
}else{
self.scroll.frame = CGRectMake(0, 20, 320, 270);
}
self.scroll.backgroundColor = [UIColor redColor];
self.scroll.pagingEnabled = YES;
self.scroll.contentSize =CGSizeMake(1280, 270);
UIView*firstView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 270)];
...
UIView*fourthView = [[UIView alloc]initWithFrame:CGRectMake(960, 0, 320, 270)];
[self.scroll addSubview:firstView];
[self.scroll addSubview:secondView];
[self.scroll addSubview:thirdView];
[self.scroll addSubview:fourthView];
[self.view addSubview:self.scroll];
}
You say you're adding it totally by code, but you're making an IBOutlet to scroll. Did you create it in IB? If not, your problem is that you never instantiate the scroll view. Also, there's no need to create an ivar for scroll, just create the property inside the #interface declaration for your class extension, and refer to it with self.scroll.
I wanted to use the bounds of a UIView to create a UILabel and add it to that UIView inside the viewDidLoad method, however, I have found that the bounds of UIView is still null inside viewDidLoad. But when I look at a demo app, the bounds of its UIView is already initialised in viewDidLoad.
In the interface I have
#interface ViewController : UIViewController
#property (weak, nonatomic) IBOutlet UIView *promotionView;
#end
And I am trying to do
- (void)viewDidLoad
{
[super viewDidLoad];
UIView *container = [[UIView alloc] initWithFrame:self.promotionView.bounds];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, container.bounds.size.height-100, 320, 20)];
label.text = #"Promotion Title";
[container addSubview:label];
[self.promotionView addSubview: container];
}
but it doesn't work because the bounds of promotionView is null.
You can do it like this in viewDidAppear:
-(void)viewDidAppear:(BOOL)animated {
static int first = 1;
if (first) {
UIView *container = [[UIView alloc] initWithFrame:self.promotionView.bounds];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, container.bounds.size.height-100, 320, 20)];
label.text = #"Promotion Title";
[container addSubview:label];
[self.promotionView addSubview: container];
first = 0;
}
}