此方法在IOS7中不适合
一、自定义AlertView
1、首先新建一个OC类继承与AlertView。
2、然后再.m中添加方法 - (void)layoutSubviews
可以再这个方法里边改变alertView的背景图片，各个按钮的图片，等一系列的操作
示例代码如下：
for (UIView *v inself.subviews) {
if ([v isKindOfClass:[UIImageView class]]) {
UIImageView *imageV = (UIImageView *)v;
UIImage *image = [UIImage imageNamed:kAlertViewBackground];
image = [[image stretchableImageWithLeftCapWidth:0topCapHeight:kAlertViewBackgroundCapHeight] retain];
[imageV setImage:image];//替换alertView地背景图片
}
if ([v isKindOfClass:[UILabel class]]) {
UILabel *label = (UILabel *)v;
if ([label.text isEqualToString:self.title]) {
label.font = [kAlertViewTitleFont retain];
label.numberOfLines = 0;
label.lineBreakMode = UILineBreakModeWordWrap;
label.textColor = kAlertViewTitleTextColor;
label.backgroundColor = [UIColor clearColor];
label.textAlignment = UITextAlignmentCenter;
label.shadowColor = kAlertViewTitleShadowColor;
label.shadowOffset = kAlertViewTitleShadowOffset;//替换Title的样式
}else{
label.font = [kAlertViewMessageFont retain];
label.numberOfLines = 0;
label.lineBreakMode = UILineBreakModeWordWrap;
label.textColor = kAlertViewMessageTextColor;
label.backgroundColor = [UIColor clearColor];
label.textAlignment = UITextAlignmentCenter;
label.shadowColor = kAlertViewMessageShadowColor;
label.shadowOffset = kAlertViewMessageShadowOffset;
}
}
if ([v isKindOfClass:NSClassFromString(@"UIAlertButton")]) {//替换取消等按钮的样式
UIButton *button = (UIButton *)v;
UIImage *image = nil;
if (button.tag == 1) {
image = [UIImage imageNamed:[NSString stringWithFormat:@"alert-%@-button.png", @"gray"]];
}else{
image = [UIImage imageNamed:[NSString stringWithFormat:@"alert-%@-button.png", @"black"]];
}
image = [image stretchableImageWithLeftCapWidth:(int)(image.size.width+1)>>1 topCapHeight:0];
button.titleLabel.font = kAlertViewButtonFont;
button.titleLabel.minimumFontSize = 10;
button.titleLabel.textAlignment = UITextAlignmentCenter;
button.titleLabel.shadowOffset = kAlertViewButtonShadowOffset;
button.backgroundColor = [UIColor clearColor];
[button setBackgroundImage:image forState:UIControlStateNormal];
[button setTitleColor:kAlertViewButtonTextColorforState:UIControlStateNormal];
[button setTitleShadowColor:kAlertViewButtonShadowColorforState:UIControlStateNormal];
}
}
二、更改AlertView的弹出位置及其宽度
在代理方法
- (void)willPresentAlertView:(UIAlertView *)alertView
中修改。