NSString* valueStr = [NSString stringWithFormat:@"Test%d", i];
[_dic setObject:valueStr forKey:keyObject];
}
NSLog(@"_dic.count = %lu", [_dic count]);
}
-(void) add1 {
NSLog(@"add");
for(int i = 0; i < 5; ++ i) {
/**
* 非 autorelease 的键对象，使用完毕后要手动去 release 掉，效率较高(人为控制的销毁时机是最佳的)~
*/
KeyObject* keyObject = [[KeyObject alloc] initWithX:i*5 y:i*3];
NSString* valueStr = [NSString stringWithFormat:@"Test%d", i];
[_dic setObject:valueStr forKey:keyObject];
[keyObject release];
}
NSLog(@"_dic.count = %lu", [_dic count]);
}
/**
* objective-c 字典常规的遍历方式，先快速遍历字典的键，然后用键找出对应的值~
*/
-(void) echo {
NSLog(@"echo");
NSLog(@"_dic.count = %lu", [_dic count]);
for(KeyObject* keyObject in _dic) {
NSString* valueStr = [_dic objectForKey:keyObject];
NSLog(@"keyObject.x = %d, keyObject.y = %d, valueStr = %@", keyObject.x, keyObject.y, valueStr);
}
}
/**
* 朋友问我怎么打印出 NSMutableDictionary 中的内容，我不假思索地便回答：遍历+打印啊~
* 然后，对方投来鄙视的一眼，“你就不知道重写值对象的 -(NSString*) description;方法？”
* 顿时我就傻了~在 java 里面没少这么干，在 objective-c 里面竟然不知道举一反三，实乃罪过~
*/
-(void) echo1 {
NSLog(@"echo1");
NSLog(@"_dic.count = %lu", [_dic count]);
NSLog(@"%@", _dic);
}
-(void) search {
NSLog(@" -------- search begin! --------");
KeyObject* k0 = [KeyObject kObjectWithX:5 y:3];
NSString* result0 = [_dic objectForKey:k0];
NSLog(@"结果为：%@", result0);
KeyObject* k1 = [KeyObject kObjectWithX:20 y:12];
NSString* result1 = [_dic objectForKey:k1];
NSLog(@"结果为：%@", result1);
NSLog(@" -------- search finish! --------");
}
-(void) dealloc {
[_dic release];
[super dealloc];
}
@end
最后是 main.m
[cpp]
//
// main.m
// DictionaryKeyObject
//
// Created by BruceYang on 12-7-31.
// Copyright (c) 2012年 EricGameStudio. All rights reserved.
//
#import
#import "KeyTest.h"
int main (int argc, const char * argv[]) {
// 自动释放池~
@autoreleasepool {
KeyTest* kt = [[KeyTest alloc] init];
// [kt test];
[kt add1];
[kt echo1];
[kt echo];
[kt search];
}
return 0;
}
作者：yang3wei