Objective-C:Foundation 프레임워크 - 일반 클래스 - NSArray
1 #pragma mark
2 void arrayCreate() {
3 //
4 NSArray *array = [NSArray array];
5
6 // 1
7 array = [NSArray arrayWithObject:@"123"];
8
9 //
10 array = [NSArray arrayWithObjects:@"a", @"b", @"c", nil];
11
12 int count = [array count];
13 // count = array.count;
14 NSLog(@"%i", count);
15 }
16
17 #pragma mark
18 void arrayUse() {
19 NSObject *obj = [[NSObject alloc] init];
20 NSArray *array = [NSArray arrayWithObjects:@"a", @"b", @"c" , obj, nil];
21 //
22 if ([array containsObject:@"a"]) {
23 NSLog(@" a");
24 }
25
26 NSString *last = [array lastObject];
27 NSLog(@"last=%@", last);
28
29 NSString *str = [array objectAtIndex:1];
30 NSLog(@"%@", str);
31
32 int index = [array indexOfObject:@"c"];
33 NSLog(@"index=%i", index);
34
35 [obj release];
36 }
37
38 #pragma mark
39 void arrayMemory() {
40 // 1
41 Student *stu1 = [[Student alloc] init];
42 Student *stu2 = [[Student alloc] init];
43 Student *stu3 = [[Student alloc] init];
44
45 NSLog(@"stu1:%zi", [stu1 retainCount]);
46
47 // ， 1， retain
48 // 2
49 NSArray *array = [[NSArray alloc] initWithObjects:stu1, stu2, stu3, nil];
50
51 NSLog(@"stu1:%zi", [stu1 retainCount]);
52
53 NSLog(@"count=%zi", array.count);
54
55 // 1
56 [stu1 release];
57 [stu2 release];
58 [stu3 release];
59
60 // ， release
61 // 0
62 [array release];
63 }
64
65 #pragma mark
66 void arrayMessage() {
67 Student *stu1 = [Student student];
68 Student *stu2 = [Student student];
69 Student *stu3 = [Student student];
70
71 NSArray *array = [NSArray arrayWithObjects:stu1, stu2, stu3, nil];
72 // test
73 // [array makeObjectsPerformSelector:@selector(test)];
74 [array makeObjectsPerformSelector:@selector(test2:) withObject:@"123"];
75 }
76
77 #pragma mark 1
78 void arrayFor1() {
79 Student *stu1 = [Student student];
80 NSArray *array = [NSArray arrayWithObjects:stu1, @"1", @"2", @"3", nil];
81 int count = array.count;
82 for (int i = 0; i<count; i++) {
83 // id == void *
84 id obj = [array objectAtIndex:i];
85 NSLog(@"%i-%@", i, obj);
86 }
87 }
88
89 #pragma mark 2
90 void arrayFor2() {
91 Student *stu1 = [Student student];
92 NSArray *array = [NSArray arrayWithObjects:stu1, @"1", @"2", @"3", nil];
93 //
94 int i =0;
95 for (id obj in array) {
96 NSLog(@"%i-%@", i, obj);
97 i++;
98 }
99 }
100
101 #pragma mark 3
102 void arrayFor3() {
103 Student *stu1 = [Student student];
104 NSArray *array = [NSArray arrayWithObjects:stu1, @"1", @"2", @"3", nil];
105 [array enumerateObjectsUsingBlock:
106 ^(id obj, NSUInteger idx, BOOL *stop) {
107 NSLog(@"%i-%@", idx, obj);
108
109 // 1，
110 if (idx == 1) {
111 // BOOL
112 *stop = YES;
113 }
114 }];
115 }
116
117 #pragma mark 4
118 void arrayFor4() {
119 Student *stu1 = [Student student];
120 NSArray *array = [NSArray arrayWithObjects:stu1, @"1", @"2", @"3", nil];
121
122 //
123 // NSEnumerator *enumerator = [array objectEnumerator];
124 // （ ）
125 NSEnumerator *enumerator = [array reverseObjectEnumerator];
126
127 // allObjects
128 NSArray *array2 = [enumerator allObjects];
129 NSLog(@"array2:%@", array2);
130
131 //
132 id obj = nil;
133 while (obj = [enumerator nextObject]) {
134 NSLog(@"obj=%@", obj);
135 }
136 }#import <Foundation/Foundation.h>
@interface Book : NSObject
@property (nonatomic, retain) NSString *name;
+ (id)bookWithName:(NSString *)name;
@end
#import "Book.h"
@implementation Book
+ (id)bookWithName:(NSString *)name {
Book *book = [[[Book alloc] init] autorelease];
book.name = name;
return book;
}
- (void)dealloc {
[_name release];
[super dealloc];
}
@end 1 #pragma mark
2 void arrayNew() {
3 NSArray *array = [NSArray arrayWithObjects:@"1", @"2", nil];
4
5 NSArray *array2 = [array arrayByAddingObject:@"3"];
6
7 NSArray *array3 = [array arrayByAddingObjectsFromArray:[NSArray arrayWithObjects:@"4", @"5", nil]];
8
9 NSLog(@"array:%@", array);
10 NSLog(@"array2:%@", array2);
11 NSLog(@"array3:%@", array3);
12
13
14 NSArray *array4 = [NSArray arrayWithObjects:@"1", @"2", @"3", @"4", nil];
15 NSRange range = NSMakeRange(1, 2);
16 NSArray *array5 = [array4 subarrayWithRange:range];
17 NSLog(@"array5:%@", array5);
18 }
19
20 #pragma mark
21 void arrayOther() {
22 NSArray *array = [NSArray arrayWithObjects:@"1", @"2", @"3", @"4", nil];
23 // 1-2-3-4
24 // -
25 NSString *str = [array componentsJoinedByString:@"-"];
26 NSLog(@"%@", str);
27
28 // （ xml ）
29 NSString *path = @"/Users/apple/Desktop/array.xml";
30 [array writeToFile:path atomically:YES];
31
32
33 path = @"/Users/apple/Desktop/array.txt";
34 // （ ）
35 NSArray *array2 = [NSArray arrayWithContentsOfFile:path];
36 NSLog(@"array2:%@", array2);
37 }
38
39 #pragma mark 1
40 void arraySort1() {
41 NSArray *array = [NSArray arrayWithObjects:@"2", @"3", @"1", @"4", nil];
42
43 // ，
44 // ：compare:
45 NSArray *array2 = [array sortedArrayUsingSelector:@selector(compare:)];
46 NSLog(@"array2:%@", array2);
47 }
48
49 #pragma mark 2
50 void arraySort2() {
51 Student *stu1 = [Student studentWithFirstname:@"MingJie" lastname:@"Li"];
52 Student *stu2 = [Student studentWithFirstname:@"LongHu" lastname:@"Huang"];
53 Student *stu3 = [Student studentWithFirstname:@"LianJie" lastname:@"Li"];
54 Student *stu4 = [Student studentWithFirstname:@"Jian" lastname:@"Xiao"];
55 NSArray *array = [NSArray arrayWithObjects:stu1,stu2,stu3, stu4, nil];
56
57 //
58 NSArray *array2 = [array sortedArrayUsingSelector:@selector(compareStudent:)];
59
60 NSLog(@"array2:%@", array2);
61 }
62
63 #pragma mark 3
64 void arraySort3() {
65 Student *stu1 = [Student studentWithFirstname:@"MingJie" lastname:@"Li"];
66 Student *stu2 = [Student studentWithFirstname:@"LongHu" lastname:@"Huang"];
67 Student *stu3 = [Student studentWithFirstname:@"LianJie" lastname:@"Li"];
68 Student *stu4 = [Student studentWithFirstname:@"Jian" lastname:@"Xiao"];
69 NSArray *array = [NSArray arrayWithObjects:stu1,stu2,stu3, stu4, nil];
70
71 // block
72 NSArray *array2 = [array sortedArrayUsingComparator:
73 ^NSComparisonResult(Student *obj1, Student *obj2) {
74 //
75 NSComparisonResult result = [obj1.lastname compare:obj2.lastname];
76 // ，
77 if (result == NSOrderedSame) {
78 result = [obj1.firstname compare:obj2.firstname];
79 }
80
81 return result;
82 }];
83
84 NSLog(@"array2:%@", array2);
85 }
86
87 #pragma mark 4-
88 void arraySort4() {
89 Student *stu1 = [Student studentWithFirstname:@"MingJie" lastname:@"Li" bookName:@"book1"];
90 Student *stu2 = [Student studentWithFirstname:@"LongHu" lastname:@"Huang" bookName:@"book2"];
91 Student *stu3 = [Student studentWithFirstname:@"LianJie" lastname:@"Li" bookName:@"book2"];
92 Student *stu4 = [Student studentWithFirstname:@"Jian" lastname:@"Xiao" bookName:@"book1"];
93 NSArray *array = [NSArray arrayWithObjects:stu1,stu2,stu3, stu4, nil];
94
95 // 1.
96 // key @property
97 NSSortDescriptor *bookNameDesc = [NSSortDescriptor sortDescriptorWithKey:@"book.name" ascending:YES];
98 // 2.
99 NSSortDescriptor *lastnameDesc = [NSSortDescriptor sortDescriptorWithKey:@"lastname" ascending:YES];
100 // 3.
101 NSSortDescriptor *firstnameDesc = [NSSortDescriptor sortDescriptorWithKey:@"firstname" ascending:YES];
102 //
103 NSArray *descs = [NSArray arrayWithObjects:bookNameDesc, lastnameDesc, firstnameDesc, nil];
104
105 NSArray *array2 = [array sortedArrayUsingDescriptors:descs];
106
107 NSLog(@"array2:%@", array2);
108 }이 내용에 흥미가 있습니까?
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