當(dāng)用戶輸入不僅僅是布爾值時，可使用分段控件 （UISegmentedControl）。分段控件提供一欄按鈕（有時稱為按鈕欄），但只能激活其中一個按鈕。分段控件會導(dǎo)致用戶在屏幕上看到的內(nèi)容發(fā) 生變化。它們常用于在不同類別的信息之間選擇，或在不同的應(yīng)用屏幕之間切換。下面介紹基本屬性和基本方法的使用。
1.初始化UISegmentedControl
初始化方法：傳入的數(shù)組可以是字符串也可以是UIImage對象的圖片數(shù)組
NSArray *segmentedArray = [[NSArray alloc]initWithObjects:@"1",@"2",@"3",@"4",nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc]initWithItems:segmentedArray];
segmentedControl.frame = CGRectMake(20.0, 20.0, 250.0, 50.0);
segmentedControl.selectedSegmentIndex = 2;//設(shè)置默認(rèn)選擇項索引
segmentedControl.tintColor = [UIColor redColor];
2. 設(shè)置樣式
??：這個屬性已經(jīng)廢棄，不再起任何作用，它的枚舉如下：
segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain
3.設(shè)置在點擊后是否恢復(fù)原樣
segmentedControl.momentary = YES
4.其他屬性
設(shè)置標(biāo)簽寬度是否隨內(nèi)容自適應(yīng)：
@property(nonatomic) BOOL apportionsSegmentWidthsByContent；
注意：如果設(shè)置為NO，則所有標(biāo)簽寬度一致，為最大寬度。
5.獲取指定索引選項的圖片imageForSegmentAtIndex：
UIImageView *imageForSegmentAtIndex = [[UIImageViewalloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]];
imageForSegmentAtIndex.frame = CGRectMake(60.0, 120.0, 30.0, 30.0);? ;
6.獲取指定索引選項的標(biāo)題titleForSegmentAtIndex
UILabel *titleForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 160.0, 30.0, 30.0)];
titleForSegmentAtIndex.text = [segmentedControl titleForSegmentAtIndex:0];
7.獲取總選項數(shù)segmentedControl.numberOfSegments
UILabel *numberOfSegments = [[UILabel alloc]initWithFrame:CGRectMake(140.0, 170.0, 30.0, 30.0)];
numberOfSegments.text = [NSString stringWithFormat:@"%d",segmentedControl.numberOfSegments];
8.獲取指定索引選項的寬度widthForSegmentAtIndex：
UILabel *widthForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(180.0, 210.0, 70.0, 30.0)];
widthForSegmentAtIndex.text = [NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]];
9.設(shè)置指定索引選項不可選
// [segmentedControl setEnabled:NO forSegmentAtIndex:4];
10.判斷指定索引選項是否可選
// BOOL enableFlag = [segmentedControl isEnabledForSegmentAtIndex:4];
11.添加委托方法
[mySegmentedControladdTarget:selfaction:@selector(segmentAction:)forControlEvents:UIControlEventValueChanged]; ?
12.實現(xiàn)委托方法
-(void)segmentAction:(UISegmentedControl *)Seg{
NSInteger Index = Seg.selectedSegmentIndex;
NSLog(@"Index %i", Index);
switch (Index) {
case 0:
[self selectmyView1];
break;
case 1:
[self selectmyView2];
break;
case 2:
[self selectmyView3];
break;
case 3:
[self selectmyView4];
break;
case 4:
[self selectmyView5];
break;
case 5:
[self selectmyView6];
break;
default:
break;
}
}
13. 項目中實際應(yīng)用，放在導(dǎo)航欄中
自定義UISegmentedcontrol
UISegmentedControl *segmentedControl=[[UISegmentedControl alloc] initWithFrame:CGRectMake(80.0f, 8.0f, 200.0f, 30.0f) ];
[segmentedControl insertSegmentWithTitle:@"1" atIndex:0 animated:YES];
[segmentedControl insertSegmentWithTitle:@"2" atIndex:1 animated:YES];
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
segmentedControl.momentary = YES;
segmentedControl.multipleTouchEnabled=NO;
[segmentedControl addTarget:self action:@selector(Selectbutton:) forControlEvents:UIControlEventValueChanged];
UIBarButtonItem *segButton = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];? //自定義UIBarButtonItem，封裝定義好的UIsegmented。
[segmentedControl release];
self.navigationItem.rightBarButtonItem = segButton;? //添加到導(dǎo)航欄中
[segButton release];
14.??：下面是一些找到的圖片，在xib中的一些設(shè)置
主要參考分段選擇器
