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>>
)

但它仍然可见，它不会消失。即使我之后立即执行 [self setNeedsDisplay] 也不会。

还有其他人遇到过这个吗？这是 SDK 中的错误还是我遗漏了什么？

Answer 1

事实证明，我的代码中其他地方的错误导致在彼此之上创建多个相同的视图，从而导致此行为。