为什么我收到有关 NSMutableArray 不兼容指针类型的警告？
我在 iPad 上收到一个简单的文本字符串，我试图简单地将其解析为表视图，但我收到以下警告：
"Incompatible pointer type assigning to 'NSMutableArray*' from 'NSArray'"
因此，controller.h
NSMutableArray *homeData;
@property (nonatomic, retain) NSMutableArray *homeData;
然后，controller.m
@synthesize homeData;
后跟
[searchData appendData:data];
NSString *searchString = [[NSString alloc] initWithData:searchData encoding:NSUTF8StringEncoding];
NSArray *sectionString = [searchString componentsSeparatedByString:@";;"];
homeData = [[[sectionString objectAtIndex:0] componentsSeparatedByString:@";"] retain];
(data = 'no_home;;no_locl;;no_natl;;9:CHardaker;;')
在正常情况下，该字符串将包含一个索引号和缩写名称的列表，最多 100。
我在最后的 homeData 行收到警告。我期望 homeData objectAtIndex:0 应该是 no_home，但事实并非如此，这是执行中唯一突出的问题。
I receive a simple text string on my iPad and I am trying to simply parse this into a table view, but I get the following warning:
"Incompatible pointer type assigning to 'NSMutableArray*' from 'NSArray'"
So, controller.h
NSMutableArray *homeData;
@property (nonatomic, retain) NSMutableArray *homeData;
then, controller.m
@synthesize homeData;
followed by
[searchData appendData:data];
NSString *searchString = [[NSString alloc] initWithData:searchData encoding:NSUTF8StringEncoding];
NSArray *sectionString = [searchString componentsSeparatedByString:@";;"];
homeData = [[[sectionString objectAtIndex:0] componentsSeparatedByString:@";"] retain];
(data = 'no_home;;no_locl;;no_natl;;9:CHardaker;;')
Under normal circumstances, the string will hold a list of index numbers and abbreviated names, up to 100.
I get the warning on the final homeData line. I would expect that homeData objectAtIndex:0 should be no_home, however it is not and this is the only issue outstanding in the execution.
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componentsSeparatedByString:返回一个NSArray，而不是NSMutableArray。如果您想要可变变体，请将最后一行更改为：componentsSeparatedByString:returns anNSArray, not anNSMutableArray. If you want the mutable variant, change the last line to: