iphone - 从超级视图中删除 UITextField 不会使其在屏幕上消失

Question

我有以下代码

// Breakpoint here
[label removeFromSuperview];
[label release];
label = nil;

使用调试器输出单步执行它

(gdb) po [self subviews]
<NSCFArray 0x476af70>(
<UIImageView: 0x47581a0; frame = (0 0; 232 81); opaque = NO; autoresize = W+H; userInteractionEnabled = NO; layer = <CALayer: 0x476b3d0>>,
<UILabel: 0x4758870; frame = (15 11; 202 56); text = 'Test'; clipsToBounds = YES; autoresize = W+H; userInteractionEnabled = NO; layer = <CALayer: 0x476b590>>
)

(gdb) po label
<UILabel: 0x4758870; frame = (15 11; 202 56); text = 'Test'; clipsToBounds = YES; autoresize = W+H; userInteractionEnabled = NO; layer = <CALayer: 0x476b590>>
(gdb) n
(gdb) n
(gdb) n
(gdb) po [self subviews]
<NSCFArray 0x478c4e0>(
<UIImageView: 0x47581a0; frame = (0 0; 232 81); opaque = NO; autoresize = W+H; userInteractionEnabled = NO; layer = <CALayer: 0x476b3d0>>
)

然而它仍然是可见的，它并没有消失。即使我[self setNeedsDisplay]之后立即做也不会。

有没有其他人遇到过这个？它是 SDK 中的错误还是我遗漏了什么？

Answer 1

事实证明，我在其他地方的代码中的一个错误导致在彼此之上创建多个相同的视图，从而导致了这种行为。