#uiviewcontroller
如何判断UIViewController的视图是否可见？
这是@ progrmr的解决方案作为一个UIViewController类别：
// UIViewController+Additions.h
@interface UIViewController (Additions)
- (BOOL)isVisible;
@end
// UIViewController+Additions.m
#import "UIViewController+Additions.h"
@implementation UIViewController (Additions)
- (BOOL)isVisible {
return [self isViewLoaded] && self.view.window;
}
@end... 展开详请
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