UISegmentedControl更改圆角

1  UISegmentedControl *segmentC = [[UISegmentedControl alloc]initWithItems:[NSArray arrayWithObjects:@"本周周报",@"历史周报", nil]];
2    
3    segmentC.frame = CGRectMake(0,0, 120, 30);
4    
5   
6    
7    segmentC.layer.borderColor = [UIColor whiteColor].CGColor;
8    
9    segmentC.layer.borderWidth = 1;
10    
11    segmentC.tintColor = [UIColor whiteColor];
12    
13    segmentC.backgroundColor = [UIColor clearColor];
14    
15    
16    
17    NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], NSForegroundColorAttributeName,[UIFont systemFontOfSize:14],NSFontAttributeName,nil];
18    
19    [segmentC setTitleTextAttributes:dic forState:UIControlStateNormal];
20    
21    segmentC.layer.cornerRadius = 15.0f;
22    
23    segmentC.layer.masksToBounds = YES;
24    
25    
26    segmentC.tintColor = [UIColor whiteColor];
27    
28        self.navigationItem.titleView = segmentC;