從上海華盈刪除的UITextField不讓它消失在屏幕上

我有以下代碼從上海華盈刪除的UITextField不讓它消失在屏幕上

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

步進通過它與調試器輸出

(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，它仍然是可見的，它不會消失。即使我之後立即做[self setNeedsDisplay]。

有沒有人遇到過這個？這是SDK中的錯誤還是我錯過了一些東西？

來源

2010-04-21 jamesmoschou