我们一般切换UIViewController的时候用的是如下代码
#import "UIViewControllerDemo.h" UIViewControllerDemo *vc = [UIViewControllerDemo alloc] initWithNibName:nil bundle:nil] autorelease]; [self.navigationController pushViewController:vc animated:YES];
当我们需要切换的UIViewController多的时候呢,代码难免写成:
#import "UIViewControllerDemo1.h" #import "UIViewControllerDemo2.h" #import "UIViewControllerDemo3.h" #import "UIViewControllerDemo4.h" UIViewControllerDemo1 *vc1 UIViewControllerDemo2 *vc2 UIViewControllerDemo3 *vc3 UIViewControllerDemo4 *vc4
以后维护的时候很是麻烦
下面我们将对UIViewController切换的方法进行改造
-(void) pushVC:(NSString *)vcName{ Class class = NSClassFromString(vcName); NSAssert(class != nil, @"Class 必须存在"); UIViewController *vc = [[[NSClassFromString(vcName) alloc] init] autorelease]; [self.navigationController pushViewController:vc animated:YES]; }
这里可以加入一个协议,使用我们指定的方法来初始化,这样可以在初始话的同时带入参数
@protocol XYSwitchControllerProtocol <NSObject> -(id) initWithObject:(id)object; @end -(void) pushVC:(NSString *)vcName object:(id)object{ Class class = NSClassFromString(vcName); NSAssert(class != nil, @"Class 必须存在"); UIViewController *vc = nil; if ([class conformsToProtocol:@protocol(XYSwitchControllerProtocol)]) { vc = [[[NSClassFromString(vcName) alloc] initWithObject:object] autorelease]; }else { vc = [[[NSClassFromString(vcName) alloc] init] autorelease]; vc.parameters = object; } [self.navigationController pushViewController:vc animated:YES]; }
模态的方法则多个考虑个UINavigationController
-(void) modalVC:(NSString *)vcName withNavigationVC:(NSString *)nvcName object:(id)object succeed:(UIViewController_block_void)block{ Class class = NSClassFromString(vcName); NSAssert(class != nil, @"Class 必须存在"); UIViewController *vc = nil; if ([class conformsToProtocol:@protocol(XYSwitchControllerProtocol)]) { vc = [[[NSClassFromString(vcName) alloc] initWithObject:object] autorelease]; }else { vc = [[[NSClassFromString(vcName) alloc] init] autorelease]; vc.parameters = object; } UINavigationController *nvc = nil; if (nvcName) { nvc = [[[NSClassFromString(vcName) alloc] initWithRootViewController:vc] autorelease]; [self presentViewController:nvc animated:YES completion:block]; return; } [self presentViewController:vc animated:YES completion:block]; }
原文地址：http://blog.csdn.net/j2eelamp/article/details/24594159
