在使用popViewController时候遇到了两个比较隐蔽的问题.因此,在以后的开发中需要自己注意.
tips1
在调用popViewController时,使用GCD丢到main queue中去执行:
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
...
[self.navigationController popViewControllerAnimated:NO];
...
});
tips2
在代码中可能连续多次调用popViewControllerAnimated地方,最好通过遍历navigationController.viewControllers找到具体要遍历到哪个再直接pop到目标controller.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
BOOL findIt = NO;
UIViewController *targetVC = nil;
for (UIViewController *subVC in self.navigationController.viewControllers) {
if (findIt) {
break;
}
if (subVC == xxx) {
findIt = YES;
}else{
targetVC = subVC;
}
}
[self.navigationController popToViewController:targetVC animated:NO];
});
