相信大家都見過或用過
NSSelectorFromString 與 [NSObject performSelector:]
[ 常見的使用場景 ] ：
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 0) {
[self func0];
} else if (indexPath.row == 1) {
[self func1];
} else if (indexPath.row == N) {
[self funcN];
} else {
[self doSomething];
}
}
那這個可以用動態(tài)方法怎么做重構(gòu)呢？
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
SEL funcSEL = NSSelectorFromString([NSString stringWithFormat:@"func%d", indexPath.row]);
if ([self respondsToSelector:funcSEL]) {
[self performSelector:funcSEL];
} else {
[self dosomething];
}
}
