如何定义UISegmentedControl的框架？
我希望分段控件出现在container view的底部，即UIView。
答案 0 :(得分：178)
这个是完美的我测试.....
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];
然后在你的课程中添加你的方法。
- (void)MySegmentControlAction:(UISegmentedControl *)segment
{
if(segment.selectedSegmentIndex == 0)
{
// code for the first button
}
}
对于已弃用的UISegmentedControlStyle，您可以查看this URL。
答案 1 :(得分：19)
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2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;}
}
}
答案 2 :(得分：12)
更新了Swift 4.x的答案：
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中的原始答案：
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];
然后创建在用户更改值时调用的segmentAction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switch语句，因为它看起来更干净。您可以通过创建枚举并将其中的值用于选项（optionUno，optionDos，optionTres）而不是0,1,2来改进它。
答案 3 :(得分：7)
步骤1。使用索引值
创建分段控件- (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];
//--**--
}
第2步。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
}
}
答案 4 :(得分：6)
要以编程方式将UISegmentedControl添加到容器视图，请执行以下步骤：
// 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];
如果您有任何疑问，请与我联系。
答案 5 :(得分：1)
这适用于所有类型的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];
答案 6 :(得分：1)
<强>夫特：
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
}
}