對於我的應用程序,我想將NSString轉換爲包含二進制等效項的NSMutableString。所有空間必須放在適當的位置。將字符串轉換爲空格不變的二進制文件
我發現了一個將字符串轉換爲二進制的代碼片段,但是排除了所有的空格。它看起來像這個或多或少:
NSMutableString *str2 = [NSMutableString stringWithFormat:@""];
for(NSInteger numberCopy = str; numberCopy > 0; numberCopy >>=1) {
//Prepend "0" or "1", depending on the bit
[str2 insertString:((numberCopy & 1) ? @"1" : @"0") atIndex:0];
}
str被輸入,str2被輸出。
對於包含空格的版本,我有一個數組將輸入字符串除以componentsSeparatedByString: @" "
,然後將二進制轉換程序片段(上面)切片到每個數組對象。我想補充的空間早在
不過,我得到跟該控制檯錯誤
*** -[__NSArrayM objectAtIndex:]: index 2 beyond bounds [0 .. 1]
(雖然我不認爲它很重要):
0 CoreFoundation 0x00007fff84a08b06 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8c72f3f0 objc_exception_throw + 43
2 CoreFoundation 0x00007fff849a58ec -[__NSArrayM objectAtIndex:] + 252
3 G-Clock 0x0000000100001ff1 -[GCAppController tick:] + 1937
4 Foundation 0x00007fff8a011d05 __NSFireDelayedPerform + 358
5 CoreFoundation 0x00007fff849c5804 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
6 CoreFoundation 0x00007fff849c531d __CFRunLoopDoTimer + 557
7 CoreFoundation 0x00007fff849aaad9 __CFRunLoopRun + 1529
8 CoreFoundation 0x00007fff849aa0e2 CFRunLoopRunSpecific + 290
9 HIToolbox 0x00007fff83bbdeb4 RunCurrentEventLoopInMode + 209
10 HIToolbox 0x00007fff83bbdb94 ReceiveNextEventCommon + 166
11 HIToolbox 0x00007fff83bbdae3 BlockUntilNextEventMatchingListInMode + 62
12 AppKit 0x00007fff88b7a533 _DPSNextEvent + 685
13 AppKit 0x00007fff88b79df2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
14 AppKit 0x00007fff88b711a3 -[NSApplication run] + 517
15 AppKit 0x00007fff88b15bd6 NSApplicationMain + 869
16 G-Clock 0x0000000100000ea2 main + 34
17 libdyld.dylib 0x00007fff864fc7e1 start + 0
18 ??? 0x0000000000000003 0x0 + 3
)
我可以弄清楚什麼是錯的,更別說如何改變它了。
我的代碼,通過str是輸入和str2是輸出:
//Convert to binary
NSMutableString *str2 = [NSMutableString stringWithFormat:@""];
int count = -1;
NSArray *array = [str componentsSeparatedByString: @" "];
NSUInteger numObjects = [array count];
//Converts each object of array into binary separately, so spaces remain intact.
while (1) {
++count;
NSString *string = array[count];
NSMutableString *mutStr = [NSMutableString stringWithFormat:@""];
for (NSInteger numberCopy = [string intValue]; numberCopy > 0; numberCopy >>=1) {
//Prepend "0" or "1", depending on the bit
[mutStr insertString:((numberCopy & 1) ? @"1" : @"0") atIndex:0];
}
if (numObjects != count + 1) {
//Add space if this is not last run through
[mutStr appendString: @" "];
} else break;
[str2 appendString: mutStr];
}
這是絕對不會讓我的代碼工作,但不幸的是,它不是解決方案。編輯該文件。 –
@ jazz14456:代碼中出現了另一個錯誤,請參閱更新後的答案。 –
我也在同一時間發佈:)。我會接受你的,因爲你不是提問者,而且你做了第一部分關於'count + 1'而不是'++ count'以及最後的錯誤 –