如何定义一个UISegmentedControl
的外框? 我想让分段控制器显示在包含视图的底部,即UIView
。
如何定义一个UISegmentedControl
的外框? 我想让分段控制器显示在包含视图的底部,即UIView
。
这一个是完美的,我进行了测试……
UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 435)];
scroll.contentSize = CGSizeMake(320, 700);
scroll.showsHorizontalScrollIndicator = YES;
NSArray *itemArray = [NSArray arrayWithObjects: @"One", @"Two", @"Three", nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
segmentedControl.frame = CGRectMake(35, 200, 250, 50);
segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;
[segmentedControl addTarget:self action:@selector(MySegmentControlAction:) forControlEvents: UIControlEventValueChanged];
segmentedControl.selectedSegmentIndex = 1;
[scroll addSubview:segmentedControl];
[segmentedControl release];
[self.view addSubview:scroll];
然后在你的类中添加你的方法。
- (void)MySegmentControlAction:(UISegmentedControl *)segment
{
if(segment.selectedSegmentIndex == 0)
{
// code for the first button
}
}
如果你需要使用已被弃用的UISegmentedControlStyle,可以查看此链接。
import UIKit
class ViewController: UIViewController {
/**
Loads the view and in our case we override default loadView to provide
custom SegmentedControl.
*/
override func loadView() {
super.loadView()
self.view.backgroundColor = UIColor.purpleColor()
println("Main view's loadView() called.")
// Initialize
let items = ["Purple", "Green", "Blue"]
let customSC = UISegmentedControl(items: items)
customSC.selectedSegmentIndex = 0
// Set up Frame and SegmentedControl
let frame = UIScreen.mainScreen().bounds
customSC.frame = CGRectMake(frame.minX + 10, frame.minY + 50,
frame.width - 20, frame.height*0.1)
// Style the Segmented Control
customSC.layer.cornerRadius = 5.0 // Don't let background bleed
customSC.backgroundColor = UIColor.blackColor()
customSC.tintColor = UIColor.whiteColor()
// Add target action method
customSC.addTarget(self, action: "changeColor:", forControlEvents: .ValueChanged)
// Add this custom Segmented Control to our view
self.view.addSubview(customSC)
}
/**
Handler for when custom Segmented Control changes and will change the
background color of the view depending on the selection.
*/
func changeColor(sender: UISegmentedControl) {
println("Change color handler is called.")
print("Changing Color to ")
switch sender.selectedSegmentIndex {
case 1:
self.view.backgroundColor = UIColor.greenColor()
println("Green")
case 2:
self.view.backgroundColor = UIColor.blueColor()
println("Blue")
default:
self.view.backgroundColor = UIColor.purpleColor()
println("Purple")
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
SOURCE: http://www.richardhsu.me/
适用于 Swift 4.x 的更新答案:
class SegmentClass: UIViewController {
func addControl() {
let items = ["Uno", "Dos", "Tres"]
let segmentedControl = UISegmentedControl(items: items)
segmentedControl.frame = CGRect(x: 35, y: 200, width: 250, height: 50)
segmentedControl.addTarget(self, action: #selector(segmentAction(_:)), for: .valueChanged)
segmentedControl.selectedSegmentIndex = 1
view.addSubview(segmentedControl)
}
@objc func segmentAction(_ segmentedControl: UISegmentedControl) {
switch (segmentedControl.selectedSegmentIndex) {
case 0:
break // Uno
case 1:
break // Dos
case 2:
break // Tres
default:
break
}
}
}
Objective-C 的原始回答:
NSArray *itemArray = [NSArray arrayWithObjects: @"Uno", @"Dos", @"Tres", nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
segmentedControl.frame = CGRectMake(35, 200, 250, 50);
[segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents: UIControlEventValueChanged];
segmentedControl.selectedSegmentIndex = 1;
[self.view addSubview:segmentedControl];
然后创建segmentAction方法,在用户更改值时调用该方法
- (void)segmentAction:(UISegmentedControl *)segment
{
switch (segment.selectedSegmentIndex) {
case 0:
// Uno
break;
case 1:
// Dos
break;
case 2:
// Tres
break;
default:
break;
}
}
我更喜欢使用switch语句,因为它更清晰易读。你可以通过创建一个枚举并使用其中的值(optionUno、optionDos、optionTres)代替0、1、2来改进它。
你可以这样做...
UISegmentedControl *segmentControl = [[UISegmentedControl alloc]initWithItems:@[@"One",@"Two"]];
[segmentControl setSegmentedControlStyle:UISegmentedControlStyleBar];
segmentControl.frame = CGRectMake(10, 50, 300, 30);
[segmentControl addTarget:self action:@selector(segmentedControlValueDidChange:) forControlEvents:UIControlEventValueChanged];
[segmentControl setSelectedSegmentIndex:0];
[scrollView addSubview:segmentControl];
[segmentControl release];
第二步:
-(void)segmentedControlValueDidChange:(UISegmentedControl *)segment
{
switch (segment.selectedSegmentIndex) {
case 0:{
//action for the first button (Current)
break;}
case 1:{
//action for the first button (Current)
break;}
}
}
步骤1:创建带有索引值的分段控件
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"common-bg.jpg"]];
[self.navigationItem setHidesBackButton:YES];
//-- For creating segment control in navigation bar
UISegmentedControl *mainSegment = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Back", @"Month", @"Year", @"Home", nil]];
[mainSegment setSegmentedControlStyle:UISegmentedControlStyleBar];
mainSegment.frame = CGRectMake(0,0, 400, 43);
self.navigationItem.titleView = mainSegment;
mainSegment.selectedSegmentIndex = 1;
[mainSegment addTarget:self action:@selector(mainSegmentControl:) forControlEvents: UIControlEventValueChanged];
[self.view addSubview:mainSegment];
//--**--
}
步骤2. 创建子视图
- (void)mainSegmentControl:(UISegmentedControl *)segment
{
if(segment.selectedSegmentIndex == 0)
{
// action for the first button (Current or Default)
}
else if(segment.selectedSegmentIndex == 1)
{
// action for the second button
}
else if(segment.selectedSegmentIndex == 2)
{
// action for the third button
}
else if(segment.selectedSegmentIndex == 3)
{
// action for the fourth button
}
}
// Create UISegmentedControl object to add control UISegment.
UISegmentedControl *objSegment = [[UISegmentedControl alloc] initWithItems:array];
// Set frame for objSegment Control (formate: (x, y, width, height)). where, y = (height of view - height of control).
[objSegment setFrame:CGRectMake(0, (self.view.frame.size.height - 40), 320, 40)];
// handle UISegmentedControl action.
[objSegment addTarget:self action:@selector(handleSegmentControl:) forControlEvents: UIControlEventValueChanged];
// Add your UISegmentedControl in your view.
[self.view addSubview:objSegment];
Swift:
let items = ["All Fruits", "Orange", "Grapes", "Banana"]
let filtersSegment = UISegmentedControl(items: items)
filtersSegment.frame = CGRect.init(x: 0, y: 0, width: 300, height: 50)
filtersSegment.selectedSegmentIndex = 0
filtersSegment.tintColor = UIColor.black
filtersSegment.addTarget(self, action: #selector(self.filterApply), for: UIControlEvents.valueChanged)
self.view.addSubview(filterSegment)
@objc private func filterApply(segment: UISegmentedControl) -> Void {
switch segment.selectedSegmentIndex {
case 1:
//Do something for Orange
case 2:
//Do something for Grapes
case 3:
//Do something for Banana
default:
//Do something for All Fruits
}
}
这将适用于所有类型的iOS设备:
UISegment *segment = [[UISegmentedControl alloc] initWithItems:array];
segment.frame = CGRectMake(0, self.view.frame.size.height - 40, 300, 40);
UIFont *font = [UIFont fontWithName:@"DroidSans" size:18.0f];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:font
forKey:NSFontAttributeName];
[segment setTitleTextAttributes:attributes
forState:UIControlStateNormal];
[segment addTarget:self action:@selector(segmentAction:) forControlEvents: UIControlEventValueChanged];
[self.view addSubview:segment];