XBLoadButton:圆形按钮，执行时会有光环圈旋转

XBLoadButton 圆形按钮，执行时会有光环圈旋转 代码 #import "XBLoadingButton.h" XBLoadingButton* btn = [[XBLoadingButton alloc] initWithFrame:CGRectMake(100, 200, 80, 80)]; [btn setTitle:@"点击开始"]; __weak typeof (btn) wBtn = btn; [btn addAction:^{ [wBtn setTitle:@"正在加载"]; dispatch_async(dispatch_get_global_queue(0, 0), ^{ sleep(3); dispatch_async(dispatch_get_main_queue(), ^{