Ios 我加上“观察员”；contentSize“；当contentSize具有新值但在某些设备上崩溃时，更改帧
我将“contentSize”的观察者添加到UITableView，代码如下：Ios 我加上“观察员”；contentSize“；当contentSize具有新值但在某些设备上崩溃时，更改帧,ios,objective-c,Ios,Objective C,我将“contentSize”的观察者添加到UITableView，代码如下： [self addObserver:_contentView forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:nil]; if ([keyPath isEqualToString:@"contentSize"]) { CGFloat topHeight = 0;
[self addObserver:_contentView forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:nil];
if ([keyPath isEqualToString:@"contentSize"]) {
CGFloat topHeight = 0;
if (_topPartView != nil) {
topHeight = _topPartView.frame.size.height;
}
_mininumDisplayHeight = MIN(_settedMin, _contentView.contentSize.height);
_maxinumDisplayHeight = MIN(_settedMax, _contentView.contentSize.height+topHeight);
if (_displayState == MaxDisPlay) {
DDLogDebug(@"-contentSize displayMax-");
_contentView.frame = [self maxFrame];
[self resetTopWithContentFrame:[self maxFrame]];
}else{
DDLogDebug(@"-contentSize displayMin-");
_contentView.frame = [self minFrame];
[self resetTopWithContentFrame:[self minFrame]];
}
}
[self addObserver:_contentView forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:nil];
if ([keyPath isEqualToString:@"contentSize"]) {
CGFloat topHeight = 0;
if (_topPartView != nil) {
topHeight = _topPartView.frame.size.height;
}
_mininumDisplayHeight = MIN(_settedMin, _contentView.contentSize.height);
_maxinumDisplayHeight = MIN(_settedMax, _contentView.contentSize.height+topHeight);
if (_displayState == MaxDisPlay) {
DDLogDebug(@"-contentSize displayMax-");
_contentView.frame = [self maxFrame];
[self resetTopWithContentFrame:[self maxFrame]];
}else{
DDLogDebug(@"-contentSize displayMin-");
_contentView.frame = [self minFrame];
[self resetTopWithContentFrame:[self minFrame]];
}
}
-(CGRect)minFrame{
CGFloat ignore = 0;
if (_topPartView != nil ) {
ignore = _topPartView.frame.size.height;
}
NSString *valueStr = [NSString stringWithFormat:@"%.2f",self.bounds.size.height - _mininumDisplayHeight];
return CGRectMake(0, valueStr.floatValue, self.bounds.size.width, _maxinumDisplayHeight - ignore);
}
-(CGRect)maxFrame{
CGFloat ignore = 0;
if (_topPartView != nil ) {
ignore = _topPartView.frame.size.height;
}
NSString *valueStr = [NSString stringWithFormat:@"%.2f",self.bounds.size.height - (_maxinumDisplayHeight - ignore)];
return CGRectMake(0, valueStr.floatValue, self.bounds.size.width, _maxinumDisplayHeight - ignore);
}
Crashed: com.apple.main-thread
0 libsystem_c.dylib 0x1abaf7620 __vfprintf + 40
1 libsystem_c.dylib 0x1abb1ae54 __v2printf + 396
2 libsystem_c.dylib 0x1abb016f4 _vsnprintf + 264
3 libsystem_c.dylib 0x1abaf680c snprintf_l + 32
4 CoreFoundation 0x1abe34344 __CFStringAppendFormatCore + 8928
5 CoreFoundation 0x1abe35920 _CFStringCreateWithFormatAndArgumentsAux2 + 156
6 Foundation 0x1ac160d50 +[NSString stringWithFormat:] + 76
7 MyApp 0x100554ccc -[CustomPullView minFrame] + 118 (CustomPullView.m:118)
8 MyApp 0x100555884 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 275 (CustomPullView.m:275)
9 Foundation 0x1ac25b89c NSKeyValueNotifyObserver + 292
10 Foundation 0x1ac25d924 NSKeyValueDidChange + 340
11 Foundation 0x1ac25d398 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 632
12 Foundation 0x1ac1a6f60 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 72
13 Foundation 0x1ac2597d0 _NSSetSizeValueAndNotify + 316
14 UIKitCore 0x1b01abac0 -[UITableView setContentSize:skipContentOffsetAdjustment:] + 108
15 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
16 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
17 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
18 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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25 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
26 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
27 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
28 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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37 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
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47 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
48 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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57 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
58 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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66 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
67 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
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85 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
86 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
87 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
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96 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
97 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
98 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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107 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
108 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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118 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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127 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
128 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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136 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
137 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
138 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
139 Foundation 0x1ac25b89c NSKeyValueNotifyObserver + 292
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145 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
146 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
147 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
148 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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156 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
157 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
158 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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168 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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175 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
176 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
177 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
178 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
179 Foundation 0x1ac25b89c NSKeyValueNotifyObserver + 292
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186 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
187 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
188 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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196 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
197 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
198 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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205 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
206 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
207 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
208 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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215 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
216 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
217 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
218 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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225 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
226 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
227 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
228 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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236 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
237 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
238 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
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242 Foundation 0x1ac1a6f60 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 72
243 Foundation 0x1ac2597d0 _NSSetSizeValueAndNotify + 316
244 UIKitCore 0x1b01abac0 -[UITableView setContentSize:skipContentOffsetAdjustment:] + 108
245 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
246 UIKitCore 0x1b01aa160 -[UITableView _rectChangedWithNewSize:oldSize:] + 404
247 UIKitCore 0x1b01aa75c -[UITableView setFrame:] + 256
248 MyApp 0x100555894 -[CustomPullView observeValueForKeyPath:ofObject:change:context:] + 276 (CustomPullView.m:276)
249 Foundation 0x1ac25b89c NSKeyValueNotifyObserver + 292
250 Foundation 0x1ac25d924 NSKeyValueDidChange + 340
251 Foundation 0x1ac25d398 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 632
252 Foundation 0x1ac1a6f60 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 72
253 Foundation 0x1ac2597d0 _NSSetSizeValueAndNotify + 316
254 UIKitCore 0x1b01abac0 -[UITableView setContentSize:skipContentOffsetAdjustment:] + 108
255 UIKitCore 0x1b01839b8 -[UITableView _updateContentSizeSkippingContentOffsetAdjustment:] + 516
我找不到坠机的原因，也无法重现坠机过程。此崩溃主要出现在13.5以上的任何iOS设备上。有人能帮我吗？可能
self.bounds.size.width#包括并将CGRectMake（0，valueStr.floatValue，self.bounds.size.width，_maxinumDisplayHeight-ignore）
替换为CGRectMake（0，valueStr.floatValue，isnan（self.bounds.size.width）？0:self.bounds.size.width，_maxinumDisplayHeight-ignore）
/p>只是一个注释而已。。。我认为如果您倾听frame
的更改，并根据更改计算内容大小，而不是相反，那么您的解决方案会更加稳定。