/*---------------------NSArray---------------------------*/
//創建數組
NSArray *array1 = [NSArray arrayWithObject:@"1"];
NSArray *array2 = [NSArray arrayWithObjects:@"1",@"2",@"3", nil];
NSArray *array3 = [NSArray arrayWithArray:array2];
NSLog(@"array1 = %@",array1);
NSLog(@"array2 = %@",array2);
NSLog(@"array3 = %@",array3);
//獲取數組內數據個數
int count = [array2 count];
NSLog(@"array2 size is %d",count);
//訪問數組內的數據
NSString *str1 = [array2 objectAtIndex:0];
NSLog(@"array2 first content is %@",str1);
//數組中插入數據 返回新的數組
NSArray *array4 = [array3 arrayByAddingObject:@"4"];
NSLog(@"array4 = %@",array4);
//數組內的數據以制定字符連接
NSString *str2 = [array4 componentsJoinedByString:@","];
NSLog(@"str2 = %@",str2);
//判斷數組中是否包含某對象
BOOL b1 = [array4 containsObject:@"4"];
BOOL b2 = [array4 containsObject:@"5"];
NSLog(@"b1 = %d,b2 = %d",b1,b2);
//取數組內製定對象的索引
int index = [array4 indexOfObject:@"4"];
NSLog(@"index = %d",index);
NSString *str3 = [array4 lastObject];
NSLog(@"array4 last object is %@",str3);
/*-----------------------可變數組NSMutableArray-----------------------------------------*/
//初始化數組 指定數組長度 但可變
NSMutableArray *mArray1 = [NSMutableArray arrayWithCapacity:5];
//向數組中添加元素
[mArray1 addObject:@"aaaa"];
[mArray1 addObject:@"cccc"];
NSLog(@"mArray1 = %@",mArray1);
//向指定位置插入元素
[mArray1 insertObject:@"bbbb" atIndex:1];
[mArray1 insertObject:@"dddd" atIndex:[mArray1 count]];
[mArray1 insertObject:@"eeee" atIndex:[mArray1 count]];
NSLog(@"mArray1 = %@",mArray1);
//移除元素
[mArray1 removeObject:@"eeee"];
NSLog(@"mArray1 = %@",mArray1);
[mArray1 removeObjectAtIndex:[mArray1 count]-1];
NSLog(@"mArray1 = %@",mArray1);
NSArray *array5 = [NSArray arrayWithObjects:@"bbbb",@"cccc", nil];
[mArray1 removeObjectsInArray:array5];
NSLog(@"mArray1 = %@",mArray1);
//向數組內插入數組
NSMutableArray *mArray2 = [NSMutableArray arrayWithObjects:@"aaaa",@"aaaa", nil];
[mArray2 addObject:@"bbbb"];
NSLog(@"mArray2 = %@",mArray2);
[mArray2 addObjectsFromArray:array4];
NSLog(@"mArray2 = %@",mArray2);
//替換元素
[mArray2 replaceObjectAtIndex:[mArray2 count]-1 withObject:@"5"];
NSLog(@"mArray2 = %@",mArray2);
//遍歷數組 常規方法:性能較低
NSArray *array6 = [NSArray arrayWithObjects:@"a",@"b",@"c",@"d",@"e", nil];
int len = [array6 count];
for (int i=0; i<len; i++) {
NSString *value = [array6 objectAtIndex:i];
NSLog(@"array6 %d content is %@",i,value);
}
//枚舉遍歷 相當於java中的增強for循環
for (NSString *string in array6) {
NSLog(@"array6 content is %@",string);
}
NSLog(@"-----------------------");
//當不確定數組元素類型時
for(id string in array6){
NSLog(@"array6 content is %@",string);
}
Objective-C中NSArray和NSMutableArray的基本用法
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