1.for循环遍历
//for循环遍历
NSArray *array = @[@1,@2,@3,@4,@5];
for (int i = 0; i < array.count; i++) {
NSLog(@"array[i]=%@",array[i]);
}
//for循环反向遍历
for (NSInteger i = array.count-1; i >= 0; i--) {
NSLog(@"array[i]=%@", array[i]);
}
2.NSEnumerator遍历法
//NSEnumerator遍历法
NSEnumerator *enumerator = [array objectEnumerator];
id object;
while ((object = [enumerator nextObject]) != nil) {
NSLog(@"object=%@",object);
}
//NSEnumerator遍历法反向遍历
NSEnumerator *reverseenu = [array reverseObjectEnumerator];
id object;
while ((object = [reverseenu nextObject]) != nil) {
NSLog(@"object=%@",object1);
}
3.快速遍历法
//快速遍历法
for (NSObject *obj in array) {
NSLog(@"obj=%@",obj);
}
//快速遍历法反向遍历
for (NSObject *obj in [array reverseObjectEnumerator]) {
NSLog(@"obj=%@",obj);
}
4.块枚举法
//块枚举法
[array enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"idx=%zd,obj=%@",idx,obj);
}];
//块枚举法反向遍历
[array enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"idx=%zd,obj=%@",idx,obj);
}];
