UISegment属性的深度剖析

1.segmentedControlStyle

设置segment的显示样式。

typedef NS_ENUM(NSInteger, UISegmentedControlStyle) {
UISegmentedControlStylePlain,     // large plain 系统默认平板样式
segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;
UISegmentedControlStyleBordered,  // large bordered 黑边样式
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBordered;
UISegmentedControlStyleBar,       // small button/nav bar style. Tintable 条状样式
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
    UISegmentedControlStyleBezeled,   // DEPRECATED. Do not use this style. 这个类型不要使用,用了会报错喔。
};

2.tintColor 渐变颜色

Default tintColor is nil.
Only used if style is UISegmentedControlStyleBar默认空，只有使用UISegmentedControlStyleBar，才能设置渐变颜色。

segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
segmentedControl.tintColor = [UIColor redColor];

3.momentary 设置在点击后是否恢复原样

默认为NO

segmentedControl.momentary = No;

4. numberOfSegments(只读)

获取总选项数segmentedControl.numberOfSegments

5. selectedSegmentIndex

用来设置选中项或者返回选中项。
segmentedControl.selectedSegmentIndex = 2;//设置默认选择项索引
segmentedControl.selectedSegmentIndex // 获取选中项

6.- (void)setTitle:(NSString *)title forSegmentAtIndex:(NSUInteger)segment;

[segmentedControl setTitle:@"two" forSegmentAtIndex:1];//设置指定索引的题目

7. - (void)setImage:(UIImage *)image forSegmentAtIndex:(NSUInteger)segment;

[segmentedControl setImage:[UIImage imageNamed:@"lan.png"] forSegmentAtIndex:3];//设置指定索引的图片

8.-(void)insertSegmentWithTitle:(NSString*)title atIndex:(NSUInteger)segment animated:(BOOL)animated;

[segmentedControl insertSegmentWithTitle:@"add" atIndex:3 animated:NO];//在指定索引插入一个选项并设置题目

9.-(void)insertSegmentWithImage:(UIImage *)image atIndex:(NSUInteger)segment animated:(BOOL)animated;

[segmentedControl insertSegmentWithImage:[UIImage imageNamed:@"mei.png"] atIndex:2 animated:NO];//在指定索引插入一个选项并设置图片

10．- (void)removeSegmentAtIndex:(NSUInteger)segment animated:(BOOL)animated;

[segmentedControl removeSegmentAtIndex:0 animated:NO];//移除指定索引的选项

11. - (void)removeAllSegments;

//移除所有选项
//[segmentedControl removeAllSegments];

12. - (void)setWidth:(CGFloat)width forSegmentAtIndex:(NSUInteger)segment;

// set to 0.0 width to autosize. default is 0.0
选项卡的宽度默认为0，此方法能够设置选项卡宽度。
[segmentedControl setWidth:70.0 forSegmentAtIndex:2];//设置指定索引选项的宽度

13. - (void)setContentOffset:(CGSize)offset forSegmentAtIndex:(NSUInteger)segment;

// adjust offset of image or text inside the segment. default is (0,0)
[segmentedControl setContentOffset:CGSizeMake(10,0) forSegmentAtIndex:1];
设置选项卡内部文字或者图片与默认位置的偏移量，默认位置在选项卡的中心。

14. - (void)setEnabled:(BOOL)enabled forSegmentAtIndex:(NSUInteger)segment;

[segmentedControl setEnabled:NO forSegmentAtIndex:4];//设置指定索引选项不可选

15.增加事件响应机制

监听的是这个事件：UIControlEventValueChanged，值改变事件

[segmentedControl addTarget:self  action:@selector(itemClick)   forControlEvents:UIControlEventValueChanged];