LLDB调试 ☞ Image lookup

1.1 image lookup -address 查找崩溃位置

当你遇见数组崩溃，你又没有找到崩溃的位置，只扔给你一堆报错信息，这时候image lookup来帮助你。如下

0   CoreFoundation                      0x0000000103209b0b __exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x00000001079db141 objc_exception_throw + 48
    2   CoreFoundation                      0x000000010313effb -[__NSArrayM objectAtIndex:] + 203
    3   DiDi                                0x00000001009a9f3a -[FW_MyHomeTableView tableView:cellForRowAtIndexPath:] + 1322
    4   UIKit                               0x00000001055a2ab2 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 750
    5   UIKit                               0x00000001055a2cf8 -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 74
    6   UIKit                               0x0000000105577639 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2845
    7   UIKit                               0x00000001055abccc -[UITableView _performWithCachedTraitCollection:] + 111
    8   UIKit                               0x0000000105592e7a -[UITableView layoutSubviews] + 233
    9   UIKit                               0x00000001054f955b -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1268
    10  QuartzCore                          0x0000000105114904 -[CALayer layoutSublayers] + 146

寻找到自己项目的标识，看到frame3位置，你只需要这样查找位置：

image lookup -a 0x00000001009a9f3a
      Address: DiDi[0x0000000100609f3a] (DiDi.__TEXT.__text + 6323194)
      Summary: DiDi`-[FW_MyHomeTableView tableView:cellForRowAtIndexPath:] + 1322 at FW_MyHomeTableView.m:243

项目中FW_MyHomeTableView.m.243,perfect!

1.2 image lookup -name 查找方法来源

此命令可以用来朝赵方法的来源。包括第三方SDK中的方法，也能被查到。
例：查找transformOtherModelToSuit：

(lldb) image lookup -n transformOtherModelToSuit:
1 match found in /Users/xxx/Library/Developer/Xcode/DerivedData/DiDi-cwpbvvyvqmeijmcjnneothzuthsy/Build/Products/Debug-iphonesimulator/DiDi.app/DiDi:
        Address: DiDi[0x0000000100293d60] (DiDi.__TEXT.__text + 2693664)
        Summary: DiDi`+[FW_BetFunction transformOtherModelToSuit:] at FW_BetFunction.m:107

1.3 image lookup -type 查看成员

查看某个class的所有属性和成员变量。不过貌似frameWork库中的文件不能查看。

(lldb) image lookup -t MatchEvent
1 match found in /Users/xxxx/Library/Developer/Xcode/DerivedData/DiDi-cwpbvvyvqmeijmcjnneothzuthsy/Build/Products/Debug-iphonesimulator/DiDi.app/DiDi:
id = {0x00433d32}, name = "MatchEvent", byte-size = 48, decl = MatchEvent.h:11, compiler_type = "@interface MatchEvent : NSObject{
    BOOL _isHome;
    NSString * _playerName;
    NSString * _timePoint;
    NSString * _eventType;
    NSString * _eventDesc;
}
@property ( getter = isHome,setter = setIsHome:,assign,readwrite,nonatomic ) BOOL isHome;
@property ( getter = playerName,setter = setPlayerName:,readwrite,copy,nonatomic ) NSString * playerName;
@property ( getter = timePoint,setter = setTimePoint:,readwrite,copy,nonatomic ) NSString * timePoint;
@property ( getter = eventType,setter = setEventType:,readwrite,copy,nonatomic ) NSString * eventType;
@property ( getter = eventDesc,setter = setEventDesc:,readwrite,copy,nonatomic ) NSString * eventDesc;
@end"