UIAlertView 的基本用法就不再说了，如果我们向用户提供了选项，并且需要这些选项，可以通过实现协议里的方法。我们通过以下两个方法判断选择：
1，硬编码的方式对按钮的索引做比较，或用switch语句。
2，通过-buttonTitleAtIndex方法，比较字符串。
如果警告视图较多，那就不只是判断是那个按钮被按下，而是那个警告视图的那个按钮了。
我们使用Block能让这个过程更加漂亮。
XYAlertView.h：
#import <UIKit/UIKit.h>
typedef void(^XYAlertBlock)(void);
@interface XYAlertView : UIAlertView<UIAlertViewDelegate>{
}
+ (void)showWithTitle:(NSString *)title
message:(NSString *)message
buttonTitle:(NSString *)buttonTitle;
+ (void)showWithTitle:(NSString *)title
message:(NSString *)message
cancelTitle:(NSString *)cancelTitle
cancelBlock:(XYAlertBlock)cancelBlock
otherTitle:(NSString *)otherTitle
otherBlock:(XYAlertBlock)otherBlock;
@end
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XYAlertView.m：
#import "XYAlertView.h"
@interface XYAlertView ()
@property (nonatomic, copy) XYAlertBlock cancelBlock;
@property (nonatomic, copy) XYAlertBlock otherBlock;
@property (nonatomic, copy) NSString *cancelButtonTitle;
@property (nonatomic, copy) NSString *otherButtonTitle;
- (id)initWithTitle:(NSString *)title
message:(NSString *)message
cancelTitle:(NSString *)cancelTitle
ancelBlock:(XYAlertBlock)cancelBolck
otherTitle:(NSString *)otherTitle
otherBlock:(XYAlertBlock)otherBlock;
@implementation XYAlertView
@synthesize cancelBlock = _cancelBlock;
@synthesize otherBlock = _otherBlock;
@synthesize cancelButtonTitle = _cancelButtonTitle;
@synthesize otherButtonTitle = _otherButtonTitle;
+ (void)showWithTitle:(NSString *)title message:(NSString *)message buttonTitle:(NSString *)buttonTitle{
[self showWithTitle:title message:message cancelTitle:buttonTitle cancelBlock:nil otherTitle:nil otherBlock:nil];
}
+ (void)showWithTitle:(NSString *)title message:(NSString *)message cancelTitle:(NSString *)cancelTitle cancelBlock:(XYAlertBlock)cancelBlock otherTitle:(NSString *)otherTitle otherBlock:(XYAlertBlock)otherBlock{
[[[self alloc] initWithTitle:title message:message cancelTitle:cancelTitle ancelBlock:cancelBlock otherTitle:otherTitle otherBlock:otherBlock] show];
}
- (id)initWithTitle:(NSString *)title message:(NSString *)message cancelTitle:(NSString *)cancelTitle ancelBlock:(XYAlertBlock)cancelBolck otherTitle:(NSString *)otherTitle otherBlock:(XYAlertBlock)otherBlock{
if ((self = [super initWithTitle:title message:message delegate:self cancelButtonTitle:cancelTitle otherButtonTitles:otherTitle, nil])) {
if (cancelBolck == nil && otherBlock == nil) {
self.delegate = nil;
}
self.cancelButtonTitle = cancelTitle;
self.otherButtonTitle = otherTitle;
self.cancelBlock = cancelBolck;
self.otherBlock = otherBlock;
}
return self;
}
#pragma mark -
#pragma mark UIAlertViewDelegate
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
NSString *buttonTitle = [alertView buttonTitleAtIndex:buttonIndex];
if ([buttonTitle isEqualToString:self.cancelButtonTitle]) {
if (self.cancelBlock) {
self.cancelBlock();
}
}else if ([buttonTitle isEqualToString:self.otherButtonTitle]){
if (self.otherBlock) {
self.otherBlock();
}
}
}
@end
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