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NSArray *array = [NSMutableArray array];
如果我使用这段代码分配一个数组,屏幕后面会发生什么?这是一种好时尚还是缺点?在我的项目,如果我有这样的事情:这个objective-c变量初始化时尚是否正确?
NSArray *array = [NSMutableArray array];
array = [array arrayByAddingObject:@"Hi"];
NSLog(@"%@",array);
输出:嗨
但如果我这样做是这样的:5日线得到了触发
@property (assign) NSArray *filesInfo;
switch (streamEvent) {
case NSStreamEventOpenCompleted: {
self.filesInfo = [NSArray array];
self.didOpenStream = YES;
self.receivedData = [NSMutableData data];
break;
}
case NSStreamEventHasBytesAvailable: {
data = [self.streamInfo read:self];
if (data) {
[self.receivedData appendData:data];
}
else {
[self.streamInfo streamError:self errorCode:kGRFTPClientCantReadStream];
}
break;
}
case NSStreamEventHasSpaceAvailable:
break;
case NSStreamEventErrorOccurred: {
[self.streamInfo streamError:self errorCode:[GRError errorCodeWithError:[theStream streamError]]];
break;
}
case NSStreamEventEndEncountered: {
NSUInteger offset = 0;
CFIndex parsedBytes;
uint8_t *bytes = (uint8_t *)[self.receivedData bytes];
NSUInteger totalbytes = [self.receivedData length];
do {
@autoreleasepool {
CFDictionaryRef listingEntity = NULL;
parsedBytes = CFFTPCreateParsedResourceListing(NULL, &bytes[offset], totalbytes - offset, &listingEntity);
if (parsedBytes > 0) {
if (listingEntity != NULL) {
self.filesInfo = [self.filesInfo arrayByAddingObject:(__bridge_transfer NSDictionary *)listingEntity];
}
offset += parsedBytes;
}
}
} while (parsedBytes > 0);
[self.streamInfo streamComplete:self];
break;
}
default:
break;
}
之后,filesInfo类型变为到NSConcreteMutableData类型。
预先感谢您!
是的,我知道这是非常破碎和危险。我的项目中的代码片段是由其他人编写的2011,似乎模仿Java变量声明时尚。例如:Map map = new HashMap (); –