我将一个Text View拖放到storyborad中的一个viewController中，并设置“自动布局”，使此textView成为0 top，0领先，0尾随其superview。但是，为什么它们之间仍然在左右分别留有间隙（大约8像素）？在大纲文档中有顶部（和底部）布局指南，它们有罪吗？
我的应用程序使用FMDB和Mantle,在iPhone 5模拟器之后一切正常但在iPhone 5s之前崩溃,看起来像Bool Variable是原因.但我无法理解为什么iPhone 5s,6和6 plus上的一切正常.
@property (nonatomic, assign) BOOL isMyFan;
@property (nonatomic, assign) BOOL isMyFollow;
@property (nonatomic, assign) NSInteger cityID;
@property (nonatomic, assign) NSInteger provinceID;
@property (nonatomic, assign) NSInteger locationID;
2015-07-14 21:33:17.264 ATOMPSGod[48894:607] -[__NSCFString charValue]: unrecognized selector sent to instance 0x79fb7700
2015-07-14 21:33:17.268 ATOMPSGod[48894:607] *** Caught exception setting key "isMyFollow" : -[__NSCFString charValue]: unrecognized selector sent to instance 0x79fb7700
2015-07-14 21:33:17.277 ATOMPSGod[48894:607] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString charValue]: unrecognized selector sent to instance 0x79fb7700' …