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自定义UISegmentedControl

 
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ios5自定义UISegmentedControl

You need to provide the following images:

segment background selected (this has both left and right caps)

segment background unselected (this has both left and right caps)

segment middle, left selected, right unselected

segment middle, left unselected, right selected

segment middle, both left & right selected

segment middle, both left & right unselected

And then use the following code to set:

/* Unselected background */
UIImage *unselectedBackgroundImage = [[UIImage imageNamed:@"segment_background_unselected"] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 10, 10, 10)];
[[UISegmentedControl appearance] setBackgroundImage:unselectedBackgroundImage
                                           forState:UIControlStateNormal
                                         barMetrics:UIBarMetricsDefault];

/* Selected background */
UIImage *selectedBackgroundImage = [[UIImage imageNamed:@"segment_background_selected"] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 10, 10, 10)];
[[UISegmentedControl appearance] setBackgroundImage:selectedBackgroundImage
                                           forState:UIControlStateSelected
                                         barMetrics:UIBarMetricsDefault];

/* Image between two unselected segments */
UIImage *bothUnselectedImage = [[UIImage imageNamed:@"segment_middle_unselected"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
[[UISegmentedControl appearance] setDividerImage:bothUnselectedImage
                             forLeftSegmentState:UIControlStateNormal
                               rightSegmentState:UIControlStateNormal
                                      barMetrics:UIBarMetricsDefault];

/* Image between segment selected on the left and unselected on the right */
UIImage *leftSelectedImage = [[UIImage imageNamed:@"segment_middle_left_selected"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
[[UISegmentedControl appearance] setDividerImage:leftSelectedImage
                             forLeftSegmentState:UIControlStateSelected
                               rightSegmentState:UIControlStateNormal
                                      barMetrics:UIBarMetricsDefault];

/* Image between segment selected on the right and unselected on the right */
UIImage *rightSelectedImage = [[UIImage imageNamed:@"segment_middle_right_selected"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
[[UISegmentedControl appearance] setDividerImage:rightSelectedImage
                             forLeftSegmentState:UIControlStateNormal
                               rightSegmentState:UIControlStateSelected
                                      barMetrics:UIBarMetricsDefault];


Note that you'll have to adjust the cap size in the stretchable images to match your images.
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