自定义Alert

使用方法 导入头文件 #import "UIViewController+WLAlert.h"

调用： [self showMyAlert:@"Alert" withCancelMsg:@"取消" withCancelBlock:^{

} withCertainMsg:@"ok" withCertainBlock:^{
    
}];
-------------------------------------------
[self showTextFieldAlert:@"Field" withPlaceholder:@"input" withCancelMsg:@"cancel" withCancelBlock:^{
    
} withCertainMsg:@"ok" withCertainBlock:^(NSString *text) {
    
}];