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//一、NSString/*----------------创建字符串的方法----------------*///1、创建常量字符串。NSString *astring = @"This is a String!";//2、创建空字符串，给予赋值。NSString *astring = [[NSString alloc] init];astring = @"This is a String!";[astring release];NSLog(@"astring:%@",astring);//3、在以上方法中，提升速度:initWit 阅读全文
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史上最全的iOS面试题及答案1.写一个NSString类的实现+(id)initWithCString:(c*****t char *)nullTerminatedCString encoding:(NSStringEncoding)encoding;+ (id) stringWithCString: (c*****t char*)nullTerminatedCString encoding: (NSStringEncoding)encoding{ NSString *obj; obj = [self allocWithZone: NSDefaultMallocZone()]; obj = [ 阅读全文
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编辑器加载中... 阅读全文