小编Rup*_*ert的帖子

我有一个Tab栏应用程序.在其中一个标签栏中,我有一个导航控制器.我试图设置一个UIButton与图像作为导航栏的右键.

    UIButton *refreshButton = [[UIButton alloc] init];
    [refreshButton setImage:[UIImage imageNamed:@"refresh_icon.png"] forState:UIControlStateNormal];
    [refreshButton addTarget:self action:@selector(refreshSection) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithCustomView:refreshButton];
    //[rightButton setImage:[UIImage imageNamed:@"refresh_icon.png"]]; << DOESN'T WORK EITHER  
    self.navigationItem.rightBarButtonItem = rightButton;
    [refreshButton release];
    [rightButton release];

但图像没有显示出来.我得到一个隐形按钮.

编辑: 我希望按钮样​​式为普通或背景为透明,以便只显示图像.因此我使用UI按钮而不是直接使用UIBarButton.

是否可以从UISwipeGestureRecognizer获取手势起点.喜欢它的可能性

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch * touch = [touches anyObject];
    gestureStartPoint = [touch locationInView:self];
}